def pehash(self):
if not HAVE_PEHASH:
self.log('error', "PEhash is missing. Please copy PEhash to the modules directory of Viper")
return
current_pehash = None
if __sessions__.is_set():
current_pehash = calculate_pehash(__sessions__.current.file.path)
self.log('info', "PEhash: {0}".format(bold(current_pehash)))
if self.args.all or self.args.cluster or self.args.scan:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
sample_path = get_sample_path(sample.sha256)
pe_hash = calculate_pehash(sample_path)
if pe_hash:
rows.append((sample.name, sample.md5, pe_hash))
if self.args.all:
self.log('info', "PEhash for all files:")
header = ['Name', 'MD5', 'PEhash']
self.log('table', dict(header=header, rows=rows))
elif self.args.cluster:
self.log('info', "Clustering files by PEhash...")
cluster = {}
for sample_name, sample_md5, pe_hash in rows:
cluster.setdefault(pe_hash, []).append([sample_name, sample_md5])
for item in cluster.items():
if len(item[1]) > 1:
self.log('info', "PEhash cluster {0}:".format(bold(item[0])))
self.log('table', dict(header=['Name', 'MD5'], rows=item[1]))
elif self.args.scan:
if __sessions__.is_set() and current_pehash:
self.log('info', "Finding matching samples...")
matches = []
for row in rows:
if row[1] == __sessions__.current.file.md5:
continue
if row[2] == current_pehash:
matches.append([row[0], row[1]])
if matches:
self.log('table', dict(header=['Name', 'MD5'], rows=matches))
else:
self.log('info', "No matches found")
def compiletime(self):
def get_compiletime(pe):
return datetime.datetime.fromtimestamp(
pe.FILE_HEADER.TimeDateStamp)
if not self.__check_session():
return
compile_time = get_compiletime(self.pe)
self.log('info', "Compile Time: {0}".format(bold(compile_time)))
if self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
cur_compile_time = get_compiletime(cur_pe)
except:
continue
if compile_time == cur_compile_time:
matches.append([sample.name, sample.md5, cur_compile_time])
else:
if self.args.window:
if cur_compile_time > compile_time:
delta = (cur_compile_time - compile_time)
elif cur_compile_time < compile_time:
delta = (compile_time - cur_compile_time)
delta_minutes = int(delta.total_seconds()) / 60
if delta_minutes <= self.args.window:
matches.append(
[sample.name, sample.md5, cur_compile_time])
self.log('info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log(
'table',
dict(header=['Name', 'MD5', 'Compile Time'], rows=matches))
def compiletime(self):
def get_compiletime(pe):
return datetime.datetime.fromtimestamp(pe.FILE_HEADER.TimeDateStamp)
if not self.__check_session():
return
compile_time = get_compiletime(self.pe)
self.log('info', "Compile Time: {0}".format(bold(compile_time)))
if self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
cur_compile_time = get_compiletime(cur_pe)
except:
continue
if compile_time == cur_compile_time:
matches.append([sample.name, sample.md5, cur_compile_time])
else:
if self.args.window:
if cur_compile_time > compile_time:
delta = (cur_compile_time - compile_time)
elif cur_compile_time < compile_time:
delta = (compile_time - cur_compile_time)
delta_minutes = int(delta.total_seconds()) / 60
if delta_minutes <= self.args.window:
matches.append([sample.name, sample.md5, cur_compile_time])
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'MD5', 'Compile Time'], rows=matches))
def ghiro(self):
if not HAVE_REQUESTS:
self.log(
'error',
"Missing dependency, install requests (`pip install requests`)"
)
return
payload = dict(private='true', json='true')
files = dict(image=open(__sessions__.current.file.path, 'rb'))
response = requests.post('http://www.imageforensic.org/api/submit/',
data=payload,
files=files)
results = response.json()
if results['success']:
report = results['report']
if len(report['signatures']) > 0:
self.log('', bold("Signatures:"))
for signature in report['signatures']:
self.log('item', signature['description'])
else:
self.log('error', "The analysis failed")
def get_config(self, family):
if not __sessions__.is_set():
self.log('error', "No session opened")
return
try:
module = importlib.import_module('modules.rats.{0}'.format(family))
except ImportError:
self.log('error',
"There is no module for family {0}".format(bold(family)))
return
config = module.config(__sessions__.current.file.data)
if not config:
self.log('error', "No Configuration Detected")
return
rows = []
for key, value in config.items():
rows.append([key, value])
rows = sorted(rows, key=lambda entry: entry[0])
self.log('info', "Configuration:")
self.log('table', dict(header=['Key', 'Value'], rows=rows))
def peid(self):
def get_signatures():
with file(os.path.join(CIRTKIT_ROOT, 'data/peid/UserDB.TXT'),
'rt') as f:
sig_data = f.read()
signatures = peutils.SignatureDatabase(data=sig_data)
return signatures
def get_matches(pe, signatures):
matches = signatures.match_all(pe, ep_only=True)
return matches
if not self.__check_session():
return
signatures = get_signatures()
peid_matches = get_matches(self.pe, signatures)
if peid_matches:
self.log('info', "PEiD Signatures:")
for sig in peid_matches:
if type(sig) is list:
self.log('item', sig[0])
else:
self.log('item', sig)
else:
self.log('info', "No PEiD signatures matched.")
if self.args.scan and peid_matches:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
cur_peid_matches = get_matches(cur_pe, signatures)
except:
continue
if peid_matches == cur_peid_matches:
matches.append([sample.name, sample.sha256])
self.log('info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'SHA256'],
rows=matches))
def peid(self):
def get_signatures():
with file(os.path.join(CIRTKIT_ROOT, 'data/peid/UserDB.TXT'), 'rt') as f:
sig_data = f.read()
signatures = peutils.SignatureDatabase(data=sig_data)
return signatures
def get_matches(pe, signatures):
matches = signatures.match_all(pe, ep_only=True)
return matches
if not self.__check_session():
return
signatures = get_signatures()
peid_matches = get_matches(self.pe, signatures)
if peid_matches:
self.log('info', "PEiD Signatures:")
for sig in peid_matches:
if type(sig) is list:
self.log('item', sig[0])
else:
self.log('item', sig)
else:
self.log('info', "No PEiD signatures matched.")
if self.args.scan and peid_matches:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
cur_peid_matches = get_matches(cur_pe, signatures)
except:
continue
if peid_matches == cur_peid_matches:
matches.append([sample.name, sample.sha256])
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'SHA256'], rows=matches))
def ghiro(self):
if not HAVE_REQUESTS:
self.log('error', "Missing dependency, install requests (`pip install requests`)")
return
payload = dict(private='true', json='true')
files = dict(image=open(__sessions__.current.file.path, 'rb'))
response = requests.post('http://www.imageforensic.org/api/submit/', data=payload, files=files)
results = response.json()
if results['success']:
report = results['report']
if len(report['signatures']) > 0:
self.log('', bold("Signatures:"))
for signature in report['signatures']:
self.log('item', signature['description'])
else:
self.log('error', "The analysis failed")
def get_config(self, family):
if not __sessions__.is_set():
self.log('error', "No session opened")
return
try:
module = importlib.import_module('modules.rats.{0}'.format(family))
except ImportError:
self.log('error', "There is no module for family {0}".format(bold(family)))
return
config = module.config(__sessions__.current.file.data)
if not config:
self.log('error', "No Configuration Detected")
return
rows = []
for key, value in config.items():
rows.append([key, value])
rows = sorted(rows, key=lambda entry: entry[0])
self.log('info', "Configuration:")
self.log('table', dict(header=['Key', 'Value'], rows=rows))
def language(self):
def get_iat(pe):
iat = []
if hasattr(pe, 'DIRECTORY_ENTRY_IMPORT'):
for peimport in pe.DIRECTORY_ENTRY_IMPORT:
iat.append(peimport.dll)
return iat
def check_module(iat, match):
for imp in iat:
if imp.find(match) != -1:
return True
return False
def is_cpp(data, cpp_count):
for line in data:
if 'type_info' in line or 'RTTI' in line:
cpp_count += 1
break
if cpp_count == 2:
return True
return False
def is_delphi(data):
for line in data:
if 'Borland' in line:
path = line.split('\\')
for p in path:
if 'Delphi' in p:
return True
return False
def is_vbdotnet(data):
for line in data:
if 'Compiler' in line:
stuff = line.split('.')
if 'VisualBasic' in stuff:
return True
return False
def is_autoit(data):
for line in data:
if 'AU3!' in line:
return True
return False
def is_packed(pe):
for section in pe.sections:
if section.get_entropy() > 7:
return True
return False
def get_strings(content):
regexp = '[\x30-\x39\x41-\x5f\x61-\x7a\-\.:]{4,}'
return re.findall(regexp, content)
def find_language(iat, sample, content):
dotnet = False
cpp_count = 0
found = None
# VB check
if check_module(iat, 'VB'):
self.log(
'info', "{0} - Possible language: Visual Basic".format(
sample.name))
return True
# .NET check
if check_module(iat, 'mscoree.dll') and not found:
dotnet = True
found = '.NET'
# C DLL check
if not found and (check_module(iat, 'msvcr') or check_module(
iat, 'MSVCR') or check_module(iat, 'c++')):
cpp_count += 1
if not found:
data = get_strings(content)
if is_cpp(data, cpp_count) and not found:
found = 'CPP'
if not found and cpp_count == 1:
found = 'C'
if not dotnet and is_delphi(data) and not found:
found = 'Delphi'
if dotnet and is_vbdotnet(data):
found = 'Visual Basic .NET'
if is_autoit(data) and not found:
found = 'AutoIt'
return found
if not self.__check_session():
return
if is_packed(self.pe):
self.log(
'warning',
"Probably packed, the language guess might be unreliable")
language = find_language(get_iat(self.pe), __sessions__.current.file,
__sessions__.current.file.data)
if language:
self.log('info', "Probable language: {0}".format(bold(language)))
else:
self.log('error', "Programming language not identified")
return
if self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
except pefile.PEFormatError as e:
continue
cur_packed = ''
if is_packed(cur_pe):
cur_packed = 'Yes'
cur_language = find_language(get_iat(cur_pe), sample,
open(sample_path, 'rb').read())
if not cur_language:
continue
if cur_language == language:
matches.append([sample.name, sample.md5, cur_packed])
if matches:
self.log(
'table',
dict(header=['Name', 'MD5', 'Is Packed'], rows=matches))
else:
self.log('info', "No matches found")
def security(self):
def get_certificate(pe):
# TODO: this only extract the raw list of certificate data.
# I need to parse them, extract single certificates and perhaps return
# the PEM data of the first certificate only.
pe_security_dir = pefile.DIRECTORY_ENTRY[
'IMAGE_DIRECTORY_ENTRY_SECURITY']
address = pe.OPTIONAL_HEADER.DATA_DIRECTORY[
pe_security_dir].VirtualAddress
# size = pe.OPTIONAL_HEADER.DATA_DIRECTORY[pe_security_dir].Size
if address:
return pe.write()[address + 8:]
else:
return None
def get_signed_samples(current=None, cert_filter=None):
db = Database()
samples = db.find(key='all')
results = []
for sample in samples:
# Skip if it's the same file.
if current:
if sample.sha256 == current:
continue
# Obtain path to the binary.
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
# Open PE instance.
try:
cur_pe = pefile.PE(sample_path)
except:
continue
cur_cert_data = get_certificate(cur_pe)
if not cur_cert_data:
continue
cur_cert_md5 = get_md5(cur_cert_data)
if cert_filter:
if cur_cert_md5 == cert_filter:
results.append([sample.name, sample.md5])
else:
results.append([sample.name, sample.md5, cur_cert_md5])
return results
if self.args.all:
self.log('info',
"Scanning the repository for all signed samples...")
all_of_them = get_signed_samples()
self.log('info',
"{0} signed samples found".format(bold(len(all_of_them))))
if len(all_of_them) > 0:
self.log(
'table',
dict(header=['Name', 'MD5', 'Cert MD5'], rows=all_of_them))
return
if not self.__check_session():
return
cert_data = get_certificate(self.pe)
if not cert_data:
self.log('warning', "No certificate found")
return
cert_md5 = get_md5(cert_data)
self.log('info',
"Found certificate with MD5 {0}".format(bold(cert_md5)))
if self.args.dump:
cert_path = os.path.join(
self.args.dump,
'{0}.crt'.format(__sessions__.current.file.sha256))
with open(cert_path, 'wb+') as cert_handle:
cert_handle.write(cert_data)
self.log('info', "Dumped certificate to {0}".format(cert_path))
self.log(
'info', "You can parse it using the following command:\n\t" +
bold("openssl pkcs7 -inform DER -print_certs -text -in {0}".
format(cert_path)))
# TODO: do scan for certificate's serial number.
if self.args.scan:
self.log('info',
"Scanning the repository for matching signed samples...")
matches = get_signed_samples(
current=__sessions__.current.file.sha256, cert_filter=cert_md5)
self.log('info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'SHA256'],
rows=matches))
# TODO: this function needs to be better integrated with the rest of the command.
# TODO: need to add more error handling and figure out why so many samples are failing.
if self.args.check:
if not HAVE_VERIFYSIGS:
self.log(
'error',
"Dependencies missing for authenticode validation. Please install M2Crypto and pyasn1 (`pip install pyasn1 M2Crypto`)"
)
return
try:
auth, computed_content_hash = get_auth_data(
__sessions__.current.file.path)
except Exception as e:
self.log('error',
"Unable to parse PE certificate: {0}".format(str(e)))
return
try:
auth.ValidateAsn1()
auth.ValidateHashes(computed_content_hash)
auth.ValidateSignatures()
auth.ValidateCertChains(time.gmtime())
except Exception, e:
self.log(
'error',
"Unable to validate PE certificate: {0}".format(str(e)))
return
self.log('info', bold('Signature metadata:'))
self.log('info', 'Program name: {0}'.format(auth.program_name))
self.log('info', 'URL: {0}'.format(auth.program_url))
if auth.has_countersignature:
self.log(
'info',
bold('Countersignature is present. Timestamp: {0} UTC'.
format(
time.asctime(time.gmtime(
auth.counter_timestamp)))))
else:
self.log('info', bold('Countersignature is not present.'))
self.log('info', bold('Binary is signed with cert issued by:'))
self.log('info', '{0}'.format(auth.signing_cert_id[0]))
self.log('info', '{0}'.format(auth.cert_chain_head[2][0]))
self.log(
'info', 'Chain not before: {0} UTC'.format(
time.asctime(time.gmtime(auth.cert_chain_head[0]))))
self.log(
'info', 'Chain not after: {0} UTC'.format(
time.asctime(time.gmtime(auth.cert_chain_head[1]))))
if auth.has_countersignature:
self.log('info', bold('Countersig chain head issued by:'))
self.log('info', '{0}'.format(auth.counter_chain_head[2]))
self.log(
'info', 'Countersig not before: {0} UTC'.format(
time.asctime(time.gmtime(auth.counter_chain_head[0]))))
self.log(
'info', 'Countersig not after: {0} UTC'.format(
time.asctime(time.gmtime(auth.counter_chain_head[1]))))
self.log('info', bold('Certificates:'))
for (issuer, serial), cert in auth.certificates.items():
self.log('info', 'Issuer: {0}'.format(issuer))
self.log('info', 'Serial: {0}'.format(serial))
subject = cert[0][0]['subject']
subject_dn = str(dn.DistinguishedName.TraverseRdn(subject[0]))
self.log('info', 'Subject: {0}'.format(subject_dn))
not_before = cert[0][0]['validity']['notBefore']
not_after = cert[0][0]['validity']['notAfter']
not_before_time = not_before.ToPythonEpochTime()
not_after_time = not_after.ToPythonEpochTime()
self.log(
'info', 'Not Before: {0} UTC ({1})'.format(
time.asctime(time.gmtime(not_before_time)),
not_before[0]))
self.log(
'info', 'Not After: {0} UTC ({1})'.format(
time.asctime(time.gmtime(not_after_time)),
not_after[0]))
if auth.trailing_data:
self.log(
'info',
'Signature Blob had trailing (unvalidated) data ({0} bytes): {1}'
.format(len(auth.trailing_data),
auth.trailing_data.encode('hex')))
def imphash(self):
if self.args.scan and self.args.cluster:
self.log('error', "You selected two exclusive options, pick one")
return
if self.args.cluster:
self.log('info', "Clustering all samples by imphash...")
db = Database()
samples = db.find(key='all')
cluster = {}
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_imphash = pefile.PE(sample_path).get_imphash()
except:
continue
if cur_imphash not in cluster:
cluster[cur_imphash] = []
cluster[cur_imphash].append([sample.sha256, sample.name])
for cluster_name, cluster_members in cluster.items():
# Skipping clusters with only one entry.
if len(cluster_members) == 1:
continue
self.log('info',
"Imphash cluster {0}".format(bold(cluster_name)))
self.log('table',
dict(header=['MD5', 'Name'], rows=cluster_members))
return
if self.__check_session():
try:
imphash = self.pe.get_imphash()
except AttributeError:
self.log(
'error',
"No imphash support, upgrade pefile to a version >= 1.2.10-139 (`pip install --upgrade pefile`)"
)
return
self.log('info', "Imphash: {0}".format(bold(imphash)))
if self.args.scan:
self.log('info',
"Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_imphash = pefile.PE(sample_path).get_imphash()
except:
continue
if imphash == cur_imphash:
matches.append([sample.name, sample.sha256])
self.log(
'info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table',
dict(header=['Name', 'SHA256'], rows=matches))
def resources(self):
# Use this function to retrieve resources for the given PE instance.
# Returns all the identified resources with indicators and attributes.
def get_resources(pe):
resources = []
if hasattr(pe, 'DIRECTORY_ENTRY_RESOURCE'):
count = 1
for resource_type in pe.DIRECTORY_ENTRY_RESOURCE.entries:
try:
resource = {}
if resource_type.name is not None:
name = str(resource_type.name)
else:
name = str(
pefile.RESOURCE_TYPE.get(
resource_type.struct.Id))
if name is None:
name = str(resource_type.struct.Id)
if hasattr(resource_type, 'directory'):
for resource_id in resource_type.directory.entries:
if hasattr(resource_id, 'directory'):
for resource_lang in resource_id.directory.entries:
data = pe.get_data(
resource_lang.data.struct.
OffsetToData,
resource_lang.data.struct.Size)
filetype = get_type(data)
md5 = get_md5(data)
language = pefile.LANG.get(
resource_lang.data.lang, None)
sublanguage = pefile.get_sublang_name_for_lang(
resource_lang.data.lang,
resource_lang.data.sublang)
offset = ('%-8s' %
hex(resource_lang.data.struct
.OffsetToData)).strip()
size = (
'%-8s' %
hex(resource_lang.data.struct.Size)
).strip()
resource = [
count, name, offset, md5, size,
filetype, language, sublanguage
]
# Dump resources if requested to and if the file currently being
# processed is the opened session file.
# This is to avoid that during a --scan all the resources being
# scanned are dumped as well.
if (self.args.open or self.args.dump
) and pe == self.pe:
if self.args.dump:
folder = self.args.dump
else:
folder = tempfile.mkdtemp()
resource_path = os.path.join(
folder, '{0}_{1}_{2}'.format(
__sessions__.current.file.
md5, offset, name))
resource.append(resource_path)
with open(resource_path,
'wb') as resource_handle:
resource_handle.write(data)
resources.append(resource)
count += 1
except Exception as e:
self.log('error', e)
continue
return resources
if not self.__check_session():
return
# Obtain resources for the currently opened file.
resources = get_resources(self.pe)
if not resources:
self.log('warning', "No resources found")
return
headers = [
'#', 'Name', 'Offset', 'MD5', 'Size', 'File Type', 'Language',
'Sublanguage'
]
if self.args.dump or self.args.open:
headers.append('Dumped To')
self.log('table', dict(header=headers, rows=resources))
# If instructed, open a session on the given resource.
if self.args.open:
for resource in resources:
if resource[0] == self.args.open:
__sessions__.new(resource[8])
return
# If instructed to perform a scan across the repository, start looping
# through all available files.
elif self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
# Retrieve list of samples stored locally and available in the
# database.
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
# Skip if it's the same file.
if sample.sha256 == __sessions__.current.file.sha256:
continue
# Obtain path to the binary.
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
# Open PE instance.
try:
cur_pe = pefile.PE(sample_path)
except:
continue
# Obtain the list of resources for the current iteration.
cur_resources = get_resources(cur_pe)
matched_resources = []
# Loop through entry's resources.
for cur_resource in cur_resources:
# Loop through opened file's resources.
for resource in resources:
# If there is a common resource, add it to the list.
if cur_resource[3] == resource[3]:
matched_resources.append(resource[3])
# If there are any common resources, add the entry to the list
# of matched samples.
if len(matched_resources) > 0:
matches.append([
sample.name, sample.md5,
'\n'.join(r for r in matched_resources)
])
self.log('info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log(
'table',
dict(header=['Name', 'MD5', 'Resource MD5'], rows=matches))
def entrypoint(self):
if self.args.scan and self.args.cluster:
self.log('error', "You selected two exclusive options, pick one")
return
if self.args.all:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(
sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
rows.append([sample.md5, sample.name, cur_ep])
self.log(
'table',
dict(header=['MD5', 'Name', 'AddressOfEntryPoint'], rows=rows))
return
if self.args.cluster:
db = Database()
samples = db.find(key='all')
cluster = {}
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(
sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
if cur_ep not in cluster:
cluster[cur_ep] = []
cluster[cur_ep].append([sample.md5, sample.name])
for cluster_name, cluster_members in cluster.items():
# Skipping clusters with only one entry.
if len(cluster_members) == 1:
continue
self.log(
'info', "AddressOfEntryPoint cluster {0}".format(
bold(cluster_name)))
self.log('table',
dict(header=['MD5', 'Name'], rows=cluster_members))
return
if not self.__check_session():
return
ep = self.pe.OPTIONAL_HEADER.AddressOfEntryPoint
self.log('info', "AddressOfEntryPoint: {0}".format(ep))
if self.args.scan:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(
sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
if ep == cur_ep:
rows.append([sample.md5, sample.name])
self.log(
'info',
"Following are samples with AddressOfEntryPoint {0}".format(
bold(ep)))
self.log('table', dict(header=['MD5', 'Name'], rows=rows))
def pehash(self):
if not HAVE_PEHASH:
self.log(
'error',
"PEhash is missing. Please copy PEhash to the modules directory of Viper"
)
return
current_pehash = None
if __sessions__.is_set():
current_pehash = calculate_pehash(__sessions__.current.file.path)
self.log('info', "PEhash: {0}".format(bold(current_pehash)))
if self.args.all or self.args.cluster or self.args.scan:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
sample_path = get_sample_path(sample.sha256)
pe_hash = calculate_pehash(sample_path)
if pe_hash:
rows.append((sample.name, sample.md5, pe_hash))
if self.args.all:
self.log('info', "PEhash for all files:")
header = ['Name', 'MD5', 'PEhash']
self.log('table', dict(header=header, rows=rows))
elif self.args.cluster:
self.log('info', "Clustering files by PEhash...")
cluster = {}
for sample_name, sample_md5, pe_hash in rows:
cluster.setdefault(pe_hash,
[]).append([sample_name, sample_md5])
for item in cluster.items():
if len(item[1]) > 1:
self.log('info',
"PEhash cluster {0}:".format(bold(item[0])))
self.log('table', dict(header=['Name', 'MD5'],
rows=item[1]))
elif self.args.scan:
if __sessions__.is_set() and current_pehash:
self.log('info', "Finding matching samples...")
matches = []
for row in rows:
if row[1] == __sessions__.current.file.md5:
continue
if row[2] == current_pehash:
matches.append([row[0], row[1]])
if matches:
self.log('table', dict(header=['Name', 'MD5'],
rows=matches))
else:
self.log('info', "No matches found")
def entrypoint(self):
if self.args.scan and self.args.cluster:
self.log('error', "You selected two exclusive options, pick one")
return
if self.args.all:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
rows.append([sample.md5, sample.name, cur_ep])
self.log('table', dict(header=['MD5', 'Name', 'AddressOfEntryPoint'], rows=rows))
return
if self.args.cluster:
db = Database()
samples = db.find(key='all')
cluster = {}
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
if cur_ep not in cluster:
cluster[cur_ep] = []
cluster[cur_ep].append([sample.md5, sample.name])
for cluster_name, cluster_members in cluster.items():
# Skipping clusters with only one entry.
if len(cluster_members) == 1:
continue
self.log('info', "AddressOfEntryPoint cluster {0}".format(bold(cluster_name)))
self.log('table', dict(header=['MD5', 'Name'],
rows=cluster_members))
return
if not self.__check_session():
return
ep = self.pe.OPTIONAL_HEADER.AddressOfEntryPoint
self.log('info', "AddressOfEntryPoint: {0}".format(ep))
if self.args.scan:
db = Database()
samples = db.find(key='all')
rows = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_ep = pefile.PE(sample_path).OPTIONAL_HEADER.AddressOfEntryPoint
except:
continue
if ep == cur_ep:
rows.append([sample.md5, sample.name])
self.log('info', "Following are samples with AddressOfEntryPoint {0}".format(bold(ep)))
self.log('table', dict(header=['MD5', 'Name'],
rows=rows))
def run(self):
super(Fuzzy, self).run()
if not HAVE_PYDEEP:
self.log('error', "Missing dependency, install pydeep (`pip install pydeep`)")
return
arg_verbose = False
arg_cluster = False
if self.args:
if self.args.verbose:
arg_verbose = self.args.verbose
if self.args.cluster:
arg_cluster = self.args.cluster
db = Database()
samples = db.find(key='all')
# Check if we're operating in cluster mode, otherwise we run on the
# currently opened file.
if arg_cluster:
self.log('info', "Generating clusters, this might take a while...")
clusters = dict()
for sample in samples:
if not sample.ssdeep:
continue
if arg_verbose:
self.log('info', "Testing file {0} with ssdeep {1}".format(
sample.md5, sample.ssdeep))
clustered = False
for cluster_name, cluster_members in clusters.items():
# Check if sample is already in the cluster.
if sample.md5 in cluster_members:
continue
if arg_verbose:
self.log('info', "Testing {0} in cluser {1}".format(
sample.md5, cluster_name))
for member in cluster_members:
if sample.md5 == member[0]:
continue
member_hash = member[0]
member_name = member[1]
member_ssdeep = db.find(key='md5', value=member_hash)[0].ssdeep
if pydeep.compare(sample.ssdeep, member_ssdeep) > 40:
if arg_verbose:
self.log('info', "Found home for {0} in cluster {1}".format(
sample.md5, cluster_name))
clusters[cluster_name].append([sample.md5, sample.name])
clustered = True
break
if not clustered:
cluster_id = len(clusters) + 1
clusters[cluster_id] = [[sample.md5, sample.name],]
ordered_clusters = collections.OrderedDict(sorted(clusters.items()))
self.log('info', "Following are the identified clusters with more than one member")
for cluster_name, cluster_members in ordered_clusters.items():
# We include in the results only clusters with more than just
# one member.
if len(cluster_members) <= 1:
continue
self.log('info', "Ssdeep cluster {0}".format(bold(cluster_name)))
self.log('table', dict(header=['MD5', 'Name'],
rows=cluster_members))
# We're running against the already opened file.
else:
if not __sessions__.is_set():
self.log('error', "No session opened")
return
if not __sessions__.current.file.ssdeep:
self.log('error', "No ssdeep hash available for opened file")
return
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
if not sample.ssdeep:
continue
score = pydeep.compare(__sessions__.current.file.ssdeep,
sample.ssdeep)
if score > 40:
matches.append(['{0}%'.format(score), sample.name,
sample.sha256])
if arg_verbose:
self.log('info', "Match {0}%: {2} [{1}]".format(score,
sample.name, sample.sha256))
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Score', 'Name', 'SHA256'],
rows=matches))
def resources(self):
# Use this function to retrieve resources for the given PE instance.
# Returns all the identified resources with indicators and attributes.
def get_resources(pe):
resources = []
if hasattr(pe, 'DIRECTORY_ENTRY_RESOURCE'):
count = 1
for resource_type in pe.DIRECTORY_ENTRY_RESOURCE.entries:
try:
resource = {}
if resource_type.name is not None:
name = str(resource_type.name)
else:
name = str(pefile.RESOURCE_TYPE.get(resource_type.struct.Id))
if name is None:
name = str(resource_type.struct.Id)
if hasattr(resource_type, 'directory'):
for resource_id in resource_type.directory.entries:
if hasattr(resource_id, 'directory'):
for resource_lang in resource_id.directory.entries:
data = pe.get_data(resource_lang.data.struct.OffsetToData, resource_lang.data.struct.Size)
filetype = get_type(data)
md5 = get_md5(data)
language = pefile.LANG.get(resource_lang.data.lang, None)
sublanguage = pefile.get_sublang_name_for_lang(resource_lang.data.lang, resource_lang.data.sublang)
offset = ('%-8s' % hex(resource_lang.data.struct.OffsetToData)).strip()
size = ('%-8s' % hex(resource_lang.data.struct.Size)).strip()
resource = [count, name, offset, md5, size, filetype, language, sublanguage]
# Dump resources if requested to and if the file currently being
# processed is the opened session file.
# This is to avoid that during a --scan all the resources being
# scanned are dumped as well.
if (self.args.open or self.args.dump) and pe == self.pe:
if self.args.dump:
folder = self.args.dump
else:
folder = tempfile.mkdtemp()
resource_path = os.path.join(folder, '{0}_{1}_{2}'.format(__sessions__.current.file.md5, offset, name))
resource.append(resource_path)
with open(resource_path, 'wb') as resource_handle:
resource_handle.write(data)
resources.append(resource)
count += 1
except Exception as e:
self.log('error', e)
continue
return resources
if not self.__check_session():
return
# Obtain resources for the currently opened file.
resources = get_resources(self.pe)
if not resources:
self.log('warning', "No resources found")
return
headers = ['#', 'Name', 'Offset', 'MD5', 'Size', 'File Type', 'Language', 'Sublanguage']
if self.args.dump or self.args.open:
headers.append('Dumped To')
self.log('table', dict(header=headers, rows=resources))
# If instructed, open a session on the given resource.
if self.args.open:
for resource in resources:
if resource[0] == self.args.open:
__sessions__.new(resource[8])
return
# If instructed to perform a scan across the repository, start looping
# through all available files.
elif self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
# Retrieve list of samples stored locally and available in the
# database.
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
# Skip if it's the same file.
if sample.sha256 == __sessions__.current.file.sha256:
continue
# Obtain path to the binary.
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
# Open PE instance.
try:
cur_pe = pefile.PE(sample_path)
except:
continue
# Obtain the list of resources for the current iteration.
cur_resources = get_resources(cur_pe)
matched_resources = []
# Loop through entry's resources.
for cur_resource in cur_resources:
# Loop through opened file's resources.
for resource in resources:
# If there is a common resource, add it to the list.
if cur_resource[3] == resource[3]:
matched_resources.append(resource[3])
# If there are any common resources, add the entry to the list
# of matched samples.
if len(matched_resources) > 0:
matches.append([sample.name, sample.md5, '\n'.join(r for r in matched_resources)])
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'MD5', 'Resource MD5'], rows=matches))
def language(self):
def get_iat(pe):
iat = []
if hasattr(pe, 'DIRECTORY_ENTRY_IMPORT'):
for peimport in pe.DIRECTORY_ENTRY_IMPORT:
iat.append(peimport.dll)
return iat
def check_module(iat, match):
for imp in iat:
if imp.find(match) != -1:
return True
return False
def is_cpp(data, cpp_count):
for line in data:
if 'type_info' in line or 'RTTI' in line:
cpp_count += 1
break
if cpp_count == 2:
return True
return False
def is_delphi(data):
for line in data:
if 'Borland' in line:
path = line.split('\\')
for p in path:
if 'Delphi' in p:
return True
return False
def is_vbdotnet(data):
for line in data:
if 'Compiler' in line:
stuff = line.split('.')
if 'VisualBasic' in stuff:
return True
return False
def is_autoit(data):
for line in data:
if 'AU3!' in line:
return True
return False
def is_packed(pe):
for section in pe.sections:
if section.get_entropy() > 7:
return True
return False
def get_strings(content):
regexp = '[\x30-\x39\x41-\x5f\x61-\x7a\-\.:]{4,}'
return re.findall(regexp, content)
def find_language(iat, sample, content):
dotnet = False
cpp_count = 0
found = None
# VB check
if check_module(iat, 'VB'):
self.log('info', "{0} - Possible language: Visual Basic".format(sample.name))
return True
# .NET check
if check_module(iat, 'mscoree.dll') and not found:
dotnet = True
found = '.NET'
# C DLL check
if not found and (check_module(iat, 'msvcr') or check_module(iat, 'MSVCR') or check_module(iat, 'c++')):
cpp_count += 1
if not found:
data = get_strings(content)
if is_cpp(data, cpp_count) and not found:
found = 'CPP'
if not found and cpp_count == 1:
found = 'C'
if not dotnet and is_delphi(data) and not found:
found = 'Delphi'
if dotnet and is_vbdotnet(data):
found = 'Visual Basic .NET'
if is_autoit(data) and not found:
found = 'AutoIt'
return found
if not self.__check_session():
return
if is_packed(self.pe):
self.log('warning', "Probably packed, the language guess might be unreliable")
language = find_language(
get_iat(self.pe),
__sessions__.current.file,
__sessions__.current.file.data
)
if language:
self.log('info', "Probable language: {0}".format(bold(language)))
else:
self.log('error', "Programming language not identified")
return
if self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_pe = pefile.PE(sample_path)
except pefile.PEFormatError as e:
continue
cur_packed = ''
if is_packed(cur_pe):
cur_packed = 'Yes'
cur_language = find_language(
get_iat(cur_pe),
sample,
open(sample_path, 'rb').read()
)
if not cur_language:
continue
if cur_language == language:
matches.append([sample.name, sample.md5, cur_packed])
if matches:
self.log('table', dict(header=['Name', 'MD5', 'Is Packed'], rows=matches))
else:
self.log('info', "No matches found")
def security(self):
def get_certificate(pe):
# TODO: this only extract the raw list of certificate data.
# I need to parse them, extract single certificates and perhaps return
# the PEM data of the first certificate only.
pe_security_dir = pefile.DIRECTORY_ENTRY['IMAGE_DIRECTORY_ENTRY_SECURITY']
address = pe.OPTIONAL_HEADER.DATA_DIRECTORY[pe_security_dir].VirtualAddress
# size = pe.OPTIONAL_HEADER.DATA_DIRECTORY[pe_security_dir].Size
if address:
return pe.write()[address + 8:]
else:
return None
def get_signed_samples(current=None, cert_filter=None):
db = Database()
samples = db.find(key='all')
results = []
for sample in samples:
# Skip if it's the same file.
if current:
if sample.sha256 == current:
continue
# Obtain path to the binary.
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
# Open PE instance.
try:
cur_pe = pefile.PE(sample_path)
except:
continue
cur_cert_data = get_certificate(cur_pe)
if not cur_cert_data:
continue
cur_cert_md5 = get_md5(cur_cert_data)
if cert_filter:
if cur_cert_md5 == cert_filter:
results.append([sample.name, sample.md5])
else:
results.append([sample.name, sample.md5, cur_cert_md5])
return results
if self.args.all:
self.log('info', "Scanning the repository for all signed samples...")
all_of_them = get_signed_samples()
self.log('info', "{0} signed samples found".format(bold(len(all_of_them))))
if len(all_of_them) > 0:
self.log('table', dict(header=['Name', 'MD5', 'Cert MD5'], rows=all_of_them))
return
if not self.__check_session():
return
cert_data = get_certificate(self.pe)
if not cert_data:
self.log('warning', "No certificate found")
return
cert_md5 = get_md5(cert_data)
self.log('info', "Found certificate with MD5 {0}".format(bold(cert_md5)))
if self.args.dump:
cert_path = os.path.join(self.args.dump, '{0}.crt'.format(__sessions__.current.file.sha256))
with open(cert_path, 'wb+') as cert_handle:
cert_handle.write(cert_data)
self.log('info', "Dumped certificate to {0}".format(cert_path))
self.log('info', "You can parse it using the following command:\n\t" +
bold("openssl pkcs7 -inform DER -print_certs -text -in {0}".format(cert_path)))
# TODO: do scan for certificate's serial number.
if self.args.scan:
self.log('info', "Scanning the repository for matching signed samples...")
matches = get_signed_samples(current=__sessions__.current.file.sha256, cert_filter=cert_md5)
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'SHA256'], rows=matches))
# TODO: this function needs to be better integrated with the rest of the command.
# TODO: need to add more error handling and figure out why so many samples are failing.
if self.args.check:
if not HAVE_VERIFYSIGS:
self.log('error', "Dependencies missing for authenticode validation. Please install M2Crypto and pyasn1 (`pip install pyasn1 M2Crypto`)")
return
try:
auth, computed_content_hash = get_auth_data(__sessions__.current.file.path)
except Exception as e:
self.log('error', "Unable to parse PE certificate: {0}".format(str(e)))
return
try:
auth.ValidateAsn1()
auth.ValidateHashes(computed_content_hash)
auth.ValidateSignatures()
auth.ValidateCertChains(time.gmtime())
except Exception, e:
self.log('error', "Unable to validate PE certificate: {0}".format(str(e)))
return
self.log('info', bold('Signature metadata:'))
self.log('info', 'Program name: {0}'.format(auth.program_name))
self.log('info', 'URL: {0}'.format(auth.program_url))
if auth.has_countersignature:
self.log('info', bold('Countersignature is present. Timestamp: {0} UTC'.format(
time.asctime(time.gmtime(auth.counter_timestamp)))))
else:
self.log('info', bold('Countersignature is not present.'))
self.log('info', bold('Binary is signed with cert issued by:'))
self.log('info', '{0}'.format(auth.signing_cert_id[0]))
self.log('info', '{0}'.format(auth.cert_chain_head[2][0]))
self.log('info', 'Chain not before: {0} UTC'.format(
time.asctime(time.gmtime(auth.cert_chain_head[0]))))
self.log('info', 'Chain not after: {0} UTC'.format(
time.asctime(time.gmtime(auth.cert_chain_head[1]))))
if auth.has_countersignature:
self.log('info', bold('Countersig chain head issued by:'))
self.log('info', '{0}'.format(auth.counter_chain_head[2]))
self.log('info', 'Countersig not before: {0} UTC'.format(
time.asctime(time.gmtime(auth.counter_chain_head[0]))))
self.log('info', 'Countersig not after: {0} UTC'.format(
time.asctime(time.gmtime(auth.counter_chain_head[1]))))
self.log('info', bold('Certificates:'))
for (issuer, serial), cert in auth.certificates.items():
self.log('info', 'Issuer: {0}'.format(issuer))
self.log('info', 'Serial: {0}'.format(serial))
subject = cert[0][0]['subject']
subject_dn = str(dn.DistinguishedName.TraverseRdn(subject[0]))
self.log('info', 'Subject: {0}'.format(subject_dn))
not_before = cert[0][0]['validity']['notBefore']
not_after = cert[0][0]['validity']['notAfter']
not_before_time = not_before.ToPythonEpochTime()
not_after_time = not_after.ToPythonEpochTime()
self.log('info', 'Not Before: {0} UTC ({1})'.format(
time.asctime(time.gmtime(not_before_time)), not_before[0]))
self.log('info', 'Not After: {0} UTC ({1})'.format(
time.asctime(time.gmtime(not_after_time)), not_after[0]))
if auth.trailing_data:
self.log('info', 'Signature Blob had trailing (unvalidated) data ({0} bytes): {1}'.format(
len(auth.trailing_data), auth.trailing_data.encode('hex')))
def imphash(self):
if self.args.scan and self.args.cluster:
self.log('error', "You selected two exclusive options, pick one")
return
if self.args.cluster:
self.log('info', "Clustering all samples by imphash...")
db = Database()
samples = db.find(key='all')
cluster = {}
for sample in samples:
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_imphash = pefile.PE(sample_path).get_imphash()
except:
continue
if cur_imphash not in cluster:
cluster[cur_imphash] = []
cluster[cur_imphash].append([sample.sha256, sample.name])
for cluster_name, cluster_members in cluster.items():
# Skipping clusters with only one entry.
if len(cluster_members) == 1:
continue
self.log('info', "Imphash cluster {0}".format(bold(cluster_name)))
self.log('table', dict(header=['MD5', 'Name'],
rows=cluster_members))
return
if self.__check_session():
try:
imphash = self.pe.get_imphash()
except AttributeError:
self.log('error', "No imphash support, upgrade pefile to a version >= 1.2.10-139 (`pip install --upgrade pefile`)")
return
self.log('info', "Imphash: {0}".format(bold(imphash)))
if self.args.scan:
self.log('info', "Scanning the repository for matching samples...")
db = Database()
samples = db.find(key='all')
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
sample_path = get_sample_path(sample.sha256)
if not os.path.exists(sample_path):
continue
try:
cur_imphash = pefile.PE(sample_path).get_imphash()
except:
continue
if imphash == cur_imphash:
matches.append([sample.name, sample.sha256])
self.log('info', "{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log('table', dict(header=['Name', 'SHA256'], rows=matches))
def run(self):
super(Fuzzy, self).run()
if not HAVE_PYDEEP:
self.log(
'error',
"Missing dependency, install pydeep (`pip install pydeep`)")
return
arg_verbose = False
arg_cluster = False
if self.args:
if self.args.verbose:
arg_verbose = self.args.verbose
if self.args.cluster:
arg_cluster = self.args.cluster
db = Database()
samples = db.find(key='all')
# Check if we're operating in cluster mode, otherwise we run on the
# currently opened file.
if arg_cluster:
self.log('info',
"Generating clusters, this might take a while...")
clusters = dict()
for sample in samples:
if not sample.ssdeep:
continue
if arg_verbose:
self.log(
'info', "Testing file {0} with ssdeep {1}".format(
sample.md5, sample.ssdeep))
clustered = False
for cluster_name, cluster_members in clusters.items():
# Check if sample is already in the cluster.
if sample.md5 in cluster_members:
continue
if arg_verbose:
self.log(
'info', "Testing {0} in cluser {1}".format(
sample.md5, cluster_name))
for member in cluster_members:
if sample.md5 == member[0]:
continue
member_hash = member[0]
member_name = member[1]
member_ssdeep = db.find(
key='md5', value=member_hash)[0].ssdeep
if pydeep.compare(sample.ssdeep,
member_ssdeep) > 40:
if arg_verbose:
self.log(
'info',
"Found home for {0} in cluster {1}".
format(sample.md5, cluster_name))
clusters[cluster_name].append(
[sample.md5, sample.name])
clustered = True
break
if not clustered:
cluster_id = len(clusters) + 1
clusters[cluster_id] = [
[sample.md5, sample.name],
]
ordered_clusters = collections.OrderedDict(
sorted(clusters.items()))
self.log(
'info',
"Following are the identified clusters with more than one member"
)
for cluster_name, cluster_members in ordered_clusters.items():
# We include in the results only clusters with more than just
# one member.
if len(cluster_members) <= 1:
continue
self.log('info',
"Ssdeep cluster {0}".format(bold(cluster_name)))
self.log(
'table',
dict(header=['MD5', 'Name'], rows=cluster_members))
# We're running against the already opened file.
else:
if not __sessions__.is_set():
self.log('error', "No session opened")
return
if not __sessions__.current.file.ssdeep:
self.log('error',
"No ssdeep hash available for opened file")
return
matches = []
for sample in samples:
if sample.sha256 == __sessions__.current.file.sha256:
continue
if not sample.ssdeep:
continue
score = pydeep.compare(__sessions__.current.file.ssdeep,
sample.ssdeep)
if score > 40:
matches.append(
['{0}%'.format(score), sample.name, sample.sha256])
if arg_verbose:
self.log(
'info', "Match {0}%: {2} [{1}]".format(
score, sample.name, sample.sha256))
self.log(
'info',
"{0} relevant matches found".format(bold(len(matches))))
if len(matches) > 0:
self.log(
'table',
dict(header=['Score', 'Name', 'SHA256'], rows=matches))
def run(self):
super(VirusTotal, self).run()
if self.args is None:
return
if self.args.hash:
try:
params = {'apikey': KEY,'hash':self.args.hash}
response = requests.get(VIRUSTOTAL_URL_DOWNLOAD, params=params)
if response.status_code == 403:
self.log('error','This command requires virustotal private API key')
self.log('error','Please check that your key have the right permissions')
return
if response.status_code == 200:
response = response.content
tmp = tempfile.NamedTemporaryFile(delete=False)
tmp.write(response)
tmp.close()
return __sessions__.new(tmp.name)
except Exception as e:
self.log('error', "Failed to download file: {0}".format(e))
if not HAVE_REQUESTS:
self.log('error', "Missing dependency, install requests (`pip install requests`)")
return
if not __sessions__.is_set():
self.log('error', "No session opened")
return
data = {'resource': __sessions__.current.file.md5, 'apikey': KEY}
try:
response = requests.post(VIRUSTOTAL_URL, data=data)
except Exception as e:
self.log('error', "Failed performing request: {0}".format(e))
return
try:
virustotal = response.json()
# since python 2.7 the above line causes the Error dict object not callable
except Exception as e:
# workaround in case of python 2.7
if str(e) == "'dict' object is not callable":
try:
virustotal = response.json
except Exception as e:
self.log('error', "Failed parsing the response: {0}".format(e))
self.log('error', "Data:\n{}".format(response.content))
return
else:
self.log('error', "Failed parsing the response: {0}".format(e))
self.log('error', "Data:\n{}".format(response.content))
return
rows = []
if 'scans' in virustotal:
for engine, signature in virustotal['scans'].items():
if signature['detected']:
signature = signature['result']
else:
signature = ''
rows.append([engine, signature])
rows.sort()
if rows:
self.log('info', "VirusTotal Report:")
self.log('table', dict(header=['Antivirus', 'Signature'], rows=rows))
if self.args.submit:
self.log('', "")
self.log('info', "The file is already available on VirusTotal, no need to submit")
else:
self.log('info', "The file does not appear to be on VirusTotal yet")
if self.args.submit:
try:
data = {'apikey': KEY}
files = {'file': open(__sessions__.current.file.path, 'rb').read()}
response = requests.post(VIRUSTOTAL_URL_SUBMIT, data=data, files=files)
except Exception as e:
self.log('error', "Failed Submit: {0}".format(e))
return
try:
virustotal = response.json()
# since python 2.7 the above line causes the Error dict object not callable
except Exception as e:
# workaround in case of python 2.7
if str(e) == "'dict' object is not callable":
try:
virustotal = response.json
except Exception as e:
self.log('error', "Failed parsing the response: {0}".format(e))
self.log('error', "Data:\n{}".format(response.content))
return
else:
self.log('error', "Failed parsing the response: {0}".format(e))
self.log('error', "Data:\n{}".format(response.content))
return
if 'verbose_msg' in virustotal:
self.log('info', "{}: {}".format(bold("VirusTotal message"), virustotal['verbose_msg']))
if self.args.comment:
try:
data = {'apikey' : KEY, 'resource': __sessions__.current.file.md5, 'comment' : ' '.join(self.args.comment)}
response = requests.post(VIRUSTOTAL_URL_COMMENT,data=data)
except Exception as e:
self.log('error',"Failed Submit Comment: {0}".format(e))
return
try:
virustotal = response.json()
# since python 2.7 the above line causes the Error dict object not callable
except Exception as e:
# workaround in case of python 2.7
if str(e) == "'dict' object is not callable":
try:
virustotal = response.json
except Exception as e:
self.log('error',"Failed parsing the response: {0}".format(e))
self.log('error',"Data:\n{}".format(response.content))
return
else:
self.log('error',"Failed parsing the response: {0}".format(e))
self.log('error',"Data:\n{}".format(response.content))
return
if 'verbose_msg' in virustotal:
self.log('info',("{}: {}".format(bold("VirusTotal message"), virustotal['verbose_msg'])))
return