def cvebuild(var):
"""Search for a CVE ID and return a STIX formatted response."""
cve = CVESearch()
data = json.loads(cve.id(var))
if data:
try:
from stix.utils import set_id_namespace
namespace = {NS: NS_PREFIX}
set_id_namespace(namespace)
except ImportError:
from mixbox.idgen import set_id_namespace
from mixbox.namespaces import Namespace
namespace = Namespace(NS, NS_PREFIX, "")
set_id_namespace(namespace)
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg.stix_header.handling = _marking()
# Define the exploit target
expt = ExploitTarget()
expt.title = data['id']
expt.description = data['summary']
expt.information_source = InformationSource(
identity=Identity(name="National Vulnerability Database"))
# Add the vulnerability object to the package object
expt.add_vulnerability(_vulnbuild(data))
# Add the COA object to the ET object
for coa in COAS:
expt.potential_coas.append(
CourseOfAction(
idref=coa['id'],
timestamp=expt.timestamp))
# Do some TTP stuff with CAPEC objects
if TTPON is True:
try:
for i in data['capec']:
pkg.add_ttp(_buildttp(i, expt))
except KeyError:
pass
expt.add_weakness(_weakbuild(data))
# Add the exploit target to the package object
pkg.add_exploit_target(expt)
xml = pkg.to_xml()
title = pkg.id_.split(':', 1)[-1]
# If the function is not imported then output the xml to a file.
if __name__ == '__main__':
_postconstruct(xml, title)
return xml
else:
sys.exit("[-] Error retrieving details for " + var)
def generateTTP(incident, attribute, ttps, eventTags):
ttp = TTP(timestamp=getDateFromTimestamp(int(attribute["timestamp"])))
ttp.id_= namespace[1] + ":ttp-" + attribute["uuid"]
setTLP(ttp, attribute["distribution"], mergeTags(eventTags, attribute["AttributeTag"]))
ttp.title = attribute["category"] + ": " + attribute["value"] + " (MISP Attribute #" + attribute["id"] + ")"
if attribute["type"] == "vulnerability":
vulnerability = Vulnerability()
vulnerability.cve_id = attribute["value"]
et = ExploitTarget(timestamp=getDateFromTimestamp(int(attribute["timestamp"])))
et.id_= namespace[1] + ":et-" + attribute["uuid"]
if attribute["comment"] != "" and attribute["comment"] != "Imported via the freetext import.":
et.title = attribute["comment"]
else:
et.title = "Vulnerability " + attribute["value"]
et.add_vulnerability(vulnerability)
ttp.exploit_targets.append(et)
else:
malware = MalwareInstance()
malware.add_name(attribute["value"])
ttp.behavior = Behavior()
ttp.behavior.add_malware_instance(malware)
if attribute["comment"] != "":
ttp.description = attribute["comment"]
ttps.append(ttp)
rttp = TTP(idref=ttp.id_, timestamp=ttp.timestamp)
relatedTTP = RelatedTTP(rttp, relationship=attribute["category"])
incident.leveraged_ttps.append(relatedTTP)
def convert_vulnerability(v20):
v1x = Vulnerability()
if "name" in v20:
v1x.title = v20["name"]
if "description" in v20:
v1x.add_description(v20["description"])
if "labels" in v20:
add_missing_list_property_to_description(v1x, "labels", v20["labels"])
v1x.cve_id = extract_external_id("cve", v20["external_references"])
et = ExploitTarget(id_=convert_id20(v20["id"]),
timestamp=text_type(v20["modified"]))
et.add_vulnerability(v1x)
if "kill_chain_phases" in v20:
process_kill_chain_phases(v20["kill_chain_phases"], et)
if "object_marking_refs" in v20:
for m_id in v20["object_marking_refs"]:
ms = create_marking_specification(m_id)
if ms:
CONTAINER.add_marking(et, ms, descendants=True)
if "granular_markings" in v20:
error(
"Granular Markings present in '%s' are not supported by stix2slider",
604, v20["id"])
record_id_object_mapping(v20["id"], et)
return et
def md5(hash,provider,reporttime):
vuln = Vulnerability()
vuln.cve_id = "MD5-" + hash
vuln.description = "maliciousMD5"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
# Create a CyboX File Object
f = File()
# This automatically detects that it's an MD5 hash based on the length
f.add_hash(hash)
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "MD5-" + hash
indicator.description = ("Malicious hash " + hash + " reported from " + provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
# Add The File Object to the Indicator. This will promote the CybOX Object
# to a CybOX Observable internally.
indicator.add_observable(f)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open('/opt/TARDIS/Observables/MD5/' + hash + '.xml','w')
f.write(stix_package.to_xml())
f.close()
def url(ip,provider,reporttime):
vuln = Vulnerability()
vuln.cve_id = "IPV4-" + str(ip)
vuln.description = "maliciousURL"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
addr = Address(address_value=str(ip), category=Address.CAT_IPV4)
addr.condition = "Equals"
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "URL-" + str(ip)
indicator.description = ("Malicious URL " + str(ip) + " reported from " + provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
indicator.add_observable(addr)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open('/opt/TARDIS/Observables/URL/' + str(ip) + '.xml','w')
f.write(stix_package.to_xml())
f.close()
def url(ip, provider, reporttime):
vuln = Vulnerability()
vuln.cve_id = "IPV4-" + str(ip)
vuln.description = "maliciousURL"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
addr = Address(address_value=str(ip), category=Address.CAT_IPV4)
addr.condition = "Equals"
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "URL-" + str(ip)
indicator.description = ("Malicious URL " + str(ip) + " reported from " +
provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
indicator.add_observable(addr)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open('/opt/TARDIS/Observables/URL/' + str(ip) + '.xml', 'w')
f.write(stix_package.to_xml())
f.close()
def md5(hash, provider, reporttime):
vuln = Vulnerability()
vuln.cve_id = "MD5-" + hash
vuln.description = "maliciousMD5"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
# Create a CyboX File Object
f = File()
# This automatically detects that it's an MD5 hash based on the length
f.add_hash(hash)
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "MD5-" + hash
indicator.description = ("Malicious hash " + hash + " reported from " +
provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
# Add The File Object to the Indicator. This will promote the CybOX Object
# to a CybOX Observable internally.
indicator.add_observable(f)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open('/opt/TARDIS/Observables/MD5/' + hash + '.xml', 'w')
f.write(stix_package.to_xml())
f.close()
def cvebuild(var):
"""Search for a CVE ID and return a STIX formatted response."""
cve = CVESearch()
data = json.loads(cve.id(var))
if data:
try:
from stix.utils import set_id_namespace
namespace = {NS: NS_PREFIX}
set_id_namespace(namespace)
except ImportError:
from stix.utils import idgen
from mixbox.namespaces import Namespace
namespace = Namespace(NS, NS_PREFIX, "")
idgen.set_id_namespace(namespace)
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg.stix_header.handling = marking()
# Define the exploit target
expt = ExploitTarget()
expt.title = data['id']
expt.description = data['summary']
# Add the vulnerability object to the package object
expt.add_vulnerability(vulnbuild(data))
# Do some TTP stuff with CAPEC objects
try:
for i in data['capec']:
ttp = TTP()
ttp.title = "CAPEC-" + str(i['id'])
ttp.description = i['summary']
ttp.exploit_targets.append(ExploitTarget(idref=expt.id_))
pkg.add_ttp(ttp)
except KeyError:
pass
# Do some weakness stuff
if data['cwe'] != 'Unknown':
weak = Weakness()
weak.cwe_id = data['cwe']
expt.add_weakness(weak)
# Add the exploit target to the package object
pkg.add_exploit_target(expt)
xml = pkg.to_xml()
# If the function is not imported then output the xml to a file.
if __name__ == '__main__':
title = pkg.id_.split(':', 1)[-1]
with open(title + ".xml", "w") as text_file:
text_file.write(xml)
return xml
def cvebuild(var):
"""Search for a CVE ID and return a STIX formatted response."""
cve = CVESearch()
data = json.loads(cve.id(var))
if data:
try:
from stix.utils import set_id_namespace
namespace = {NS: NS_PREFIX}
set_id_namespace(namespace)
except ImportError:
from mixbox.idgen import set_id_namespace
from mixbox.namespaces import Namespace
namespace = Namespace(NS, NS_PREFIX, "")
set_id_namespace(namespace)
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg = STIXPackage()
pkg.stix_header = STIXHeader()
pkg.stix_header.handling = _marking()
# Define the exploit target
expt = ExploitTarget()
expt.title = data['id']
expt.description = data['summary']
expt.information_source = InformationSource(identity=Identity(
name="National Vulnerability Database"))
# Add the vulnerability object to the package object
expt.add_vulnerability(_vulnbuild(data))
# Add the COA object to the ET object
for coa in COAS:
expt.potential_coas.append(
CourseOfAction(idref=coa['id'], timestamp=expt.timestamp))
# Do some TTP stuff with CAPEC objects
if TTPON is True:
try:
for i in data['capec']:
pkg.add_ttp(_buildttp(i, expt))
except KeyError:
pass
expt.add_weakness(_weakbuild(data))
# Add the exploit target to the package object
pkg.add_exploit_target(expt)
xml = pkg.to_xml()
title = pkg.id_.split(':', 1)[-1]
# If the function is not imported then output the xml to a file.
if __name__ == '__main__':
_postconstruct(xml, title)
return xml
else:
sys.exit("[-] Error retrieving details for " + var)
def get_exploit_target_from_json(ttp_json):
json_cve = ttp_json['value']
json_title = ttp_json['title']
# title は "%CVE番号% (index)" とする
title = '%s (%s)' % (json_cve, json_title)
# CVE 情報を circl から取得する
cve_info = Cve.get_cve_info(json_cve)
# 各種 CVE 情報のリンクを作成
mitre_url = 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=' + str(
json_cve)
circl_url = 'http://cve.circl.lu/cve/' + str(json_cve)
# Expoit_Target, Vulnerability の Short Description は link
common_short_description = '%s (<a href="%s" target="_blank">MITRE</a>, <a href="%s" target="_blank">circl.lu</a>)<br/>' % (
json_cve, mitre_url, circl_url)
# base_score
try:
vul_cvss_score = CVSSVector()
vul_cvss_score.base_score = cve_info['cvss']
except BaseException:
vul_cvss_score = None
# Expoit_Target, Vulnerability の Description 作成
common_decritpion = common_short_description
# base_score があったら追加する
if vul_cvss_score is not None:
common_decritpion += ('Base Score: %s<br/>' %
(vul_cvss_score.base_score))
# vulnerability の description は circl から取得した description
try:
common_decritpion += ('%s<br/>' % (cve_info['summary']))
except BaseException:
# 取得失敗時は circl のページの url
common_decritpion += ('%s<br/>' % (circl_url))
# ExploitTarget
et = ExploitTarget()
et.title = title
et.description = common_decritpion
et.short_description = common_short_description
# Vulnerability
vulnerablity = Vulnerability()
vulnerablity.title = title
vulnerablity.description = common_decritpion
vulnerablity.short_description = common_short_description
vulnerablity.cve_id = json_cve
if vul_cvss_score is not None:
vulnerablity.cvss_score = vul_cvss_score
et.add_vulnerability(vulnerablity)
return et
def main():
pkg = STIXPackage()
vuln = Vulnerability()
vuln.cve_id = "CVE-2013-3893"
et = ExploitTarget(title="Javascript vulnerability in MSIE 6-11")
et.add_vulnerability(vuln)
pkg.add_exploit_target(et)
print pkg.to_xml()
def main():
pkg = STIXPackage()
vuln = Vulnerability()
vuln.cve_id = "CVE-2013-3893"
et = ExploitTarget(title="Javascript vulnerability in MSIE 6-11")
et.add_vulnerability(vuln)
pkg.add_exploit_target(et)
print pkg.to_xml()
def generate_vulnerability(self, incident, tags, attribute):
ttp = self.create_ttp(tags, attribute)
vulnerability = Vulnerability()
vulnerability.cve_id = attribute.value
ET = ExploitTarget(timestamp=attribute.timestamp)
ET.id_ = "{}:et-{}".format(namespace[1], attribute.uuid)
if attribute.comment and attribute.comment != "Imported via the freetext import.":
ET.title = attribute.comment
else:
ET.title = "Vulnerability {}".format(attribute.value)
ET.add_vulnerability(vulnerability)
ttp.exploit_targets.append(ET)
self.append_ttp(incident, attribute, ttp)
def main():
pkg = STIXPackage()
vuln = Vulnerability()
vuln.cve_id = "CVE-2013-3893"
vuln.add_reference(
"https://technet.microsoft.com/library/security/2887505")
et = ExploitTarget(title="Javascript vulnerability in MSIE 6-11")
et.add_vulnerability(vuln)
pkg.add_exploit_target(et)
print(pkg.to_xml(encoding=None))
def buildTarget(input_dict):
# add incident and confidence
target = ExploitTarget()
target.title = input_dict['title']
target.description = input_dict['description']
if input_dict['vulnerability']:
target.add_vulnerability(input_dict['vulnerability'])
if input_dict['weakness']:
target.add_weakness(input_dict['weakness'])
if input_dict['configuration']:
target.configuration = input_dict['configuration']
if input_dict['informationSource']:
target.information_source = InformationSource(input_dict['informationSource'])
return target
def add_cve_info(pkg):
global cve_info
if cve_info != []:
processed_ttps = []
for x in cve_info:
et = ExploitTarget()
for cve in x.get('cves'):
v = Vulnerability()
v.cve_id = cve
et.add_vulnerability(v)
pkg.add_exploit_target(et)
ttp = x.get('related_ttp')
if ttp not in processed_ttps:
if not ttp.exploit_targets:
ttp.exploit_targets = ExploitTargets()
ttp.exploit_targets.append(RelatedExploitTarget(ExploitTarget(idref=et._id)))
processed_ttps.append(ttp)
def fqdn(fqdn,provider,reporttime):
currentTime = time.time()
parsed_uri = urlparse( str(fqdn) )
domain = '{uri.scheme}://{uri.netloc}/'.format(uri=parsed_uri)
if domain.startswith('https'):
domain = domain[8:]
else:
domain = domain[7:]
if domain.endswith('/'):
domain = domain[:-1]
vuln = Vulnerability()
vuln.cve_id = "FQDN-" + str(domain) + '_' + str(currentTime)
vuln.description = "maliciousIPV4"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
url = URI()
url.value = fqdn
url.type_ = URI.TYPE_URL
url.condition = "Equals"
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "FQDN-" + str(fqdn)
indicator.description = ("Malicious FQDN " + str(fqdn) + " reported from " + provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
indicator.add_observable(url)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open('/opt/TARDIS/Observables/FQDN/' + str(domain) + '_' + str(currentTime) + '.xml','w')
f.write(stix_package.to_xml())
f.close()
def generateTTP(incident, attribute):
ttp = TTP()
ttp.id_="example:ttp-" + attribute["uuid"]
setTLP(ttp, attribute["distribution"])
ttp.title = "MISP Attribute #" + attribute["id"] + " uuid: " + attribute["uuid"]
if attribute["type"] == "vulnerability":
vulnerability = Vulnerability()
vulnerability.cve_id = attribute["value"]
et = ExploitTarget()
et.add_vulnerability(vulnerability)
ttp.exploit_targets.append(et)
else:
malware = MalwareInstance()
malware.add_name(attribute["value"])
ttp.behavior = Behavior()
ttp.behavior.add_malware_instance(malware)
relatedTTP = RelatedTTP(ttp, relationship=attribute["category"])
incident.leveraged_ttps.append(relatedTTP)
def get_exploit_target_from_cve(cve):
title = cve
# description は mitreのページヘのリンク
description = 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=' + str(
cve)
# ExploitTarget
et = ExploitTarget()
et.title = title
et.description = description
et.short_description = description
# Vulnerability
vulnerablity = Vulnerability()
vulnerablity.title = title
vulnerablity.description = description
vulnerablity.short_description = description
vulnerablity.cve_id = cve
et.add_vulnerability(vulnerablity)
return et
def fqdn(fqdn, provider, reporttime):
currentTime = time.time()
parsed_uri = urlparse(str(fqdn))
domain = '{uri.scheme}://{uri.netloc}/'.format(uri=parsed_uri)
if domain.startswith('https'):
domain = domain[8:]
else:
domain = domain[7:]
if domain.endswith('/'):
domain = domain[:-1]
vuln = Vulnerability()
vuln.cve_id = "FQDN-" + str(domain) + '_' + str(currentTime)
vuln.description = "maliciousIPV4"
et = ExploitTarget(title=provider + " observable")
et.add_vulnerability(vuln)
url = URI()
url.value = fqdn
url.type_ = URI.TYPE_URL
url.condition = "Equals"
# Create an Indicator with the File Hash Object created above.
indicator = Indicator()
indicator.title = "FQDN-" + str(fqdn)
indicator.description = ("Malicious FQDN " + str(fqdn) +
" reported from " + provider)
indicator.set_producer_identity(provider)
indicator.set_produced_time(reporttime)
indicator.add_observable(url)
# Create a STIX Package
stix_package = STIXPackage()
stix_package.add(et)
stix_package.add(indicator)
# Print the XML!
#print(stix_package.to_xml())
f = open(
'/opt/TARDIS/Observables/FQDN/' + str(domain) + '_' +
str(currentTime) + '.xml', 'w')
f.write(stix_package.to_xml())
f.close()
def generateTTP(incident, attribute):
ttp = TTP()
ttp.id_ = "example:ttp-" + attribute["uuid"]
setTLP(ttp, attribute["distribution"])
ttp.title = "MISP Attribute #" + attribute["id"] + " uuid: " + attribute[
"uuid"]
if attribute["type"] == "vulnerability":
vulnerability = Vulnerability()
vulnerability.cve_id = attribute["value"]
et = ExploitTarget()
et.add_vulnerability(vulnerability)
ttp.exploit_targets.append(et)
else:
malware = MalwareInstance()
malware.add_name(attribute["value"])
ttp.behavior = Behavior()
ttp.behavior.add_malware_instance(malware)
relatedTTP = RelatedTTP(ttp, relationship=attribute["category"])
incident.leveraged_ttps.append(relatedTTP)
def generateTTP(incident, attribute):
ttp = TTP(timestamp=getDateFromTimestamp(int(attribute["timestamp"])))
ttp.id_= namespace[1] + ":ttp-" + attribute["uuid"]
setTLP(ttp, attribute["distribution"])
ttp.title = attribute["category"] + ": " + attribute["value"] + " (MISP Attribute #" + attribute["id"] + ")"
if attribute["type"] == "vulnerability":
vulnerability = Vulnerability()
vulnerability.cve_id = attribute["value"]
et = ExploitTarget(timestamp=getDateFromTimestamp(int(attribute["timestamp"])))
et.add_vulnerability(vulnerability)
ttp.exploit_targets.append(et)
else:
malware = MalwareInstance()
malware.add_name(attribute["value"])
ttp.behavior = Behavior()
ttp.behavior.add_malware_instance(malware)
if attribute["comment"] != "":
ttp.description = attribute["comment"]
relatedTTP = RelatedTTP(ttp, relationship=attribute["category"])
incident.leveraged_ttps.append(relatedTTP)
def main():
stix_package = STIXPackage()
# Build the Exploit Target
vuln = Vulnerability()
vuln.cve_id = "CVE-2014-0160"
vuln.add_reference("http://heartbleed.com/")
et = ExploitTarget(title="Heartbleed")
et.add_vulnerability(vuln)
stix_package.add_exploit_target(et)
# Build the TTP
ttp = TTP(title="Generic Heartbleed Exploits")
ttp.exploit_targets.append(ExploitTarget(idref=et.id_))
stix_package.add_ttp(ttp)
# Build the indicator
indicator = Indicator(title="Snort Signature for Heartbleed")
indicator.confidence = Confidence("High")
tm = SnortTestMechanism()
tm.rules = [
"""alert tcp any any -> any any (msg:"FOX-SRT - Flowbit - TLS-SSL Client Hello"; flow:established; dsize:< 500; content:"|16 03|"; depth:2; byte_test:1, <=, 2, 3; byte_test:1, !=, 2, 1; content:"|01|"; offset:5; depth:1; content:"|03|"; offset:9; byte_test:1, <=, 3, 10; byte_test:1, !=, 2, 9; content:"|00 0f 00|"; flowbits:set,foxsslsession; flowbits:noalert; threshold:type limit, track by_src, count 1, seconds 60; reference:cve,2014-0160; classtype:bad-unknown; sid: 21001130; rev:9;)""",
"""alert tcp any any -> any any (msg:"FOX-SRT - Suspicious - TLS-SSL Large Heartbeat Response"; flow:established; flowbits:isset,foxsslsession; content:"|18 03|"; depth: 2; byte_test:1, <=, 3, 2; byte_test:1, !=, 2, 1; byte_test:2, >, 200, 3; threshold:type limit, track by_src, count 1, seconds 600; reference:cve,2014-0160; classtype:bad-unknown; sid: 21001131; rev:5;)"""
]
tm.efficacy = "Low"
tm.producer = InformationSource(identity=Identity(name="FOX IT"))
tm.producer.references = [
"http://blog.fox-it.com/2014/04/08/openssl-heartbleed-bug-live-blog/"
]
indicator.test_mechanisms = TestMechanisms([tm])
indicator.add_indicated_ttp(TTP(idref=ttp.id_))
stix_package.add_indicator(indicator)
print(stix_package.to_xml(encoding=None))
def main():
stix_package = STIXPackage()
# Build the Exploit Target
vuln = Vulnerability()
vuln.cve_id = "CVE-2014-0160"
vuln.add_reference("http://heartbleed.com/")
et = ExploitTarget(title="Heartbleed")
et.add_vulnerability(vuln)
stix_package.add_exploit_target(et)
# Build the TTP
ttp = TTP(title="Generic Heartbleed Exploits")
ttp.exploit_targets.append(ExploitTarget(idref=et.id_))
stix_package.add_ttp(ttp)
# Build the indicator
indicator = Indicator(title="Snort Signature for Heartbleed")
indicator.confidence = Confidence("High")
tm = SnortTestMechanism()
tm.rules = [
"""alert tcp any any -> any any (msg:"FOX-SRT - Flowbit - TLS-SSL Client Hello"; flow:established; dsize:< 500; content:"|16 03|"; depth:2; byte_test:1, <=, 2, 3; byte_test:1, !=, 2, 1; content:"|01|"; offset:5; depth:1; content:"|03|"; offset:9; byte_test:1, <=, 3, 10; byte_test:1, !=, 2, 9; content:"|00 0f 00|"; flowbits:set,foxsslsession; flowbits:noalert; threshold:type limit, track by_src, count 1, seconds 60; reference:cve,2014-0160; classtype:bad-unknown; sid: 21001130; rev:9;)""",
"""alert tcp any any -> any any (msg:"FOX-SRT - Suspicious - TLS-SSL Large Heartbeat Response"; flow:established; flowbits:isset,foxsslsession; content:"|18 03|"; depth: 2; byte_test:1, <=, 3, 2; byte_test:1, !=, 2, 1; byte_test:2, >, 200, 3; threshold:type limit, track by_src, count 1, seconds 600; reference:cve,2014-0160; classtype:bad-unknown; sid: 21001131; rev:5;)"""
]
tm.efficacy = "Low"
tm.producer = InformationSource(identity=Identity(name="FOX IT"))
tm.producer.references = ["http://blog.fox-it.com/2014/04/08/openssl-heartbleed-bug-live-blog/"]
indicator.test_mechanisms = TestMechanisms([tm])
indicator.add_indicated_ttp(TTP(idref=ttp.id_))
stix_package.add_indicator(indicator)
print(stix_package.to_xml(encoding=None))
def get_exploit_target_from_json(ttp_json):
json_cve = ttp_json['value']
json_title = ttp_json['title']
# title は "%CVE番号% (index)" とする
title = '%s (%s)' % (json_cve, json_title)
# # CVE 情報を circl から取得する
cve_info = CommonExtractor.get_cve_info(json_cve)
# Expoit_Target, Vulnerability の Short Description は link
common_short_description = CommonExtractor.get_ttp_common_short_description(
ttp_json)
# # base_score
vul_cvss_score = CommonExtractor.get_vul_cvss_score(cve_info)
# Expoit_Target, Vulnerability の Description 作成
common_decritpion = CommonExtractor.get_ttp_common_description(
ttp_json)
# ExploitTarget
et = ExploitTarget()
et.title = title
et.description = common_decritpion
et.short_description = common_short_description
# Vulnerability
vulnerablity = Vulnerability()
vulnerablity.title = title
vulnerablity.description = common_decritpion
vulnerablity.short_description = common_short_description
vulnerablity.cve_id = json_cve
if vul_cvss_score is not None:
vulnerablity.cvss_score = vul_cvss_score
et.add_vulnerability(vulnerablity)
return et
def toStixXml(self, confidence, efficacy):
"""
This method converts a list of FASGuard generated Snort rules into a STIX
compliant XML string ready for output. It first converts the object
into a hash of the right format and then converts it into XML using
STIXPackage.from_dict and to_xml on the resulting object.
Arguments:
confidence - High, Medium or Low. High means low false alarm rate.
efficacy - High, Medium or Low. High means a low missed detection rate.
Returns:
Reference to string containing STIX/CybOX XML file.
"""
logger = logging.getLogger('simple_example')
self.logger = logger
self.logger.debug('In asg.fasguardStixRule')
stix_package = STIXPackage()
# Build the Exploit Target
vuln = Vulnerability()
vuln.cve_id = "Unknown"
et = ExploitTarget(title="From FASGuard")
et.add_vulnerability(vuln)
stix_package.add_exploit_target(et)
# Build the TTP
ttp = TTP(title="FASGuard Produced Signatures")
ttp.exploit_targets.append(ExploitTarget(idref=et.id_))
stix_package.add_ttp(ttp)
# Build the indicator
indicator = Indicator(title="Snort Signature from FASGuard")
indicator.confidence = Confidence(confidence)
tm = SnortTestMechanism()
tm.rules = self.ruleList
tm.efficacy = efficacy
tm.producer = InformationSource(identity=Identity(name="FASGuard"))
tm.producer.references = ["http://fasguard.github.io/"]
indicator.test_mechanisms = [tm]
indicator.add_indicated_ttp(TTP(idref=ttp.id_))
stix_package.add_indicator(indicator)
return stix_package.to_xml()
# stixDict = {'campaigns': [{}],
# 'courses_of_action': [{}],
# 'exploit_targets': [{}],
# 'id': 'INSERT_PACKAGE_ID_HERE'}
# stixDict['indicators'] = [{'indicator':
# {'title':
# 'Automatically Generated FASGuard Signatures',
# 'test_mechanisms':
# {'test_mechanism':
# {'efficacy':'Low',
# 'producer':
# {'Identity':'FASGuard'},
# 'rule':'xyz'}}}}
# ]
stix_package = STIXPackage.from_dict(stixDict)
stix_xml = stix_package.to_xml()
return stix_xml
def toStixXml(self, confidence, efficacy):
"""
This method converts a list of FASGuard generated Snort rules into a STIX
compliant XML string ready for output. It first converts the object
into a hash of the right format and then converts it into XML using
STIXPackage.from_dict and to_xml on the resulting object.
Arguments:
confidence - High, Medium or Low. High means low false alarm rate.
efficacy - High, Medium or Low. High means a low missed detection rate.
Returns:
Reference to string containing STIX/CybOX XML file.
"""
logger = logging.getLogger('simple_example')
self.logger = logger
self.logger.debug('In asg.fasguardStixRule')
stix_package = STIXPackage()
# Build the Exploit Target
vuln = Vulnerability()
vuln.cve_id = "Unknown"
et = ExploitTarget(title="From FASGuard")
et.add_vulnerability(vuln)
stix_package.add_exploit_target(et)
# Build the TTP
ttp = TTP(title="FASGuard Produced Signatures")
ttp.exploit_targets.append(ExploitTarget(idref=et.id_))
stix_package.add_ttp(ttp)
# Build the indicator
indicator = Indicator(title = "Snort Signature from FASGuard")
indicator.confidence = Confidence(confidence)
tm = SnortTestMechanism()
tm.rules = self.ruleList
tm.efficacy = efficacy
tm.producer = InformationSource(identity=Identity(name="FASGuard"))
tm.producer.references = ["http://fasguard.github.io/"]
indicator.test_mechanisms = [tm]
indicator.add_indicated_ttp(TTP(idref=ttp.id_))
stix_package.add_indicator(indicator)
return stix_package.to_xml()
# stixDict = {'campaigns': [{}],
# 'courses_of_action': [{}],
# 'exploit_targets': [{}],
# 'id': 'INSERT_PACKAGE_ID_HERE'}
# stixDict['indicators'] = [{'indicator':
# {'title':
# 'Automatically Generated FASGuard Signatures',
# 'test_mechanisms':
# {'test_mechanism':
# {'efficacy':'Low',
# 'producer':
# {'Identity':'FASGuard'},
# 'rule':'xyz'}}}}
# ]
stix_package = STIXPackage.from_dict(stixDict)
stix_xml = stix_package.to_xml()
return stix_xml
# Exploit Target 1 - Configuration
config = Configuration(
cce_id='CCE-27686-5',
description='The Apache web server be run with the appropriate privileges.',
short_description='Configuration Short Description')
et1.add_configuration(config)
# Exploit Target 1 - Vulnerability
vuln = Vulnerability()
vuln.cve_id = 'CVE-2018-1312'
cvss = CVSSVector()
cvss.base_score = '6.8'
cvss.base_vector = 'AV:N/AC:M/Au:N/C:P/I:P/A:P'
vuln.cvss_score = cvss
vuln.add_reference('https://nvd.nist.gov/vuln/detail/CVE-2018-1312')
et1.add_vulnerability(vuln)
# Exploit Target 1 - Potential COA
coa = CourseOfAction(title='Patch Apache httpd')
et1.potential_coas.append(CourseOfAction(idref=coa.id_))
# Exploit Target 2 - Related to Exploit Target 1
et2 = ExploitTarget(title='Apache HTTP Vulnerability - CVE-2018-1333')
et1.related_exploit_targets.append(ExploitTarget(idref=et2.id_))
# Generate STIX Package
stix_package = STIXPackage()
stix_package.add_exploit_target(et1)
stix_package.add_course_of_action(coa)
stix_package.add_exploit_target(et2)
