def make_network_uri(uri, condition='contains', negate=False, preserve_case = False):
document = 'Network'
search = 'Network/URI'
content_type = 'string'
content = uri
IndicatorItem_node = ioc_api.make_IndicatorItem_node(condition, document, search, content_type, content, negate=negate, preserve_case=preserve_case, context_type = None)
return IndicatorItem_node
def make_email_from(from_address, condition='contains', negate=False, preserve_case = False):
document = 'Email'
search = 'Email/From'
content_type = 'string'
content = from_address
IndicatorItem_node = ioc_api.make_IndicatorItem_node(condition, document, search, content_type, content, negate=negate, preserve_case=preserve_case, context_type = None)
return IndicatorItem_node
def convert_branch(self, old_node, new_node, comment_dict={}):
'''
convert_branch
recursively walk a indicator logic tree, starting from a Indicator node.
converts OpenIOC 1.0 Indicator/IndicatorItems to Openioc 1.1 and preserves order.
input
old_node: old node, an Indicator node, which we walk down to convert
new_node: new node, an Indicator node, which we add new IndicatorItem and Indicator nodes too
comment_dict: maps ids to comment values. only applied to IndicatorItem nodes
return
returns True upon completiong
may raise ValueError
'''
expected_tag = 'Indicator'
if old_node.tag != expected_tag:
raise ValueError('old_node expected tag is [%s]' % expected_tag)
for node in old_node.getchildren():
node_id = node.get('id')
if node.tag == 'IndicatorItem':
condition = node.get('condition')
negation = False
if condition.endswith('not'):
negation = True
condition = condition[:-3]
document = node.xpath('Context/@document')[0]
search = node.xpath('Context/@search')[0]
content_type = node.xpath('Content/@type')[0]
content = node.findtext('Content')
context_type = node.xpath('Context/@type')[0]
new_II_node = ioc_api.make_IndicatorItem_node(
condition=condition,
document=document,
search=search,
content_type=content_type,
content=content,
context_type=context_type,
negate=negation,
id=node_id)
# set comment
comment = node.find('Comment')
if comment is not None:
comment_dict[node_id] = comment.text
new_node.append(new_II_node)
elif node.tag == 'Indicator':
operator = node.get('operator')
if operator.upper() not in ['OR', 'AND']:
raise IOCParseError(
'Indicator@operator is not AND/OR. [%s] has [%s]' %
(node_id, operator))
new_I_node = ioc_api.make_Indicator_node(operator, node_id)
new_node.append(new_I_node)
self.convert_branch(node, new_I_node, comment_dict)
else:
# should never get here
raise IOCParseError('node is not a Indicator/IndicatorItem')
return True
def addStrings(xmldoc, parentnode, strings):
# This simply adds an AND block of the strings found
if len(strings) > 0:
stringsind = ioc_api.make_Indicator_node("AND")
for string in strings:
stringsinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/StringList/string", content=string, content_type="string")
stringsind.append(stringsinditem)
parentnode.append(stringsind)
else:
return
def addStrings(xmldoc, parentnode, strings):
# This simply adds an AND block of the strings found
if len(strings) > 0:
stringsind = ioc_api.make_Indicator_node("AND")
for string in strings:
stringsinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/StringList/string", content=string, content_type="string")
stringsind.append(stringsinditem)
parentnode.append(stringsind)
else:
return
def convert_branch(self, old_node, new_node, comment_dict = {}):
'''
convert_branch
recursively walk a indicator logic tree, starting from a Indicator node.
converts OpenIOC 1.0 Indicator/IndicatorItems to Openioc 1.1 and preserves order.
input
old_node: old node, an Indicator node, which we walk down to convert
new_node: new node, an Indicator node, which we add new IndicatorItem and Indicator nodes too
comment_dict: maps ids to comment values. only applied to IndicatorItem nodes
return
returns True upon completiong
may raise ValueError
'''
expected_tag = 'Indicator'
if old_node.tag != expected_tag:
raise ValueError('old_node expected tag is [%s]' % expected_tag)
for node in old_node.getchildren():
node_id = node.get('id')
if node.tag == 'IndicatorItem':
condition = node.get('condition')
negation = False
if condition.endswith('not'):
negation=True
condition = condition[:-3]
document = node.xpath('Context/@document')[0]
search = node.xpath('Context/@search')[0]
content_type = node.xpath('Content/@type')[0]
content = node.findtext('Content')
context_type = node.xpath('Context/@type')[0]
new_II_node = ioc_api.make_IndicatorItem_node(condition = condition,
document = document,
search = search,
content_type = content_type,
content = content,
context_type = context_type,
negate=negation,
id = node_id)
# set comment
comment = node.find('Comment')
if comment is not None:
comment_dict[node_id] = comment.text
new_node.append(new_II_node)
elif node.tag == 'Indicator':
operator = node.get('operator')
if operator.upper() not in ['OR', 'AND']:
raise IOCParseError('Indicator@operator is not AND/OR. [%s] has [%s]' % (node_id, operator) )
new_I_node = ioc_api.make_Indicator_node(operator, node_id)
new_node.append(new_I_node)
self.convert_branch(node, new_I_node, comment_dict)
else:
# should never get here
raise IOCParseError('node is not a Indicator/IndicatorItem')
return True
def make_email_from(from_address,
condition='contains',
negate=False,
preserve_case=False):
document = 'Email'
search = 'Email/From'
content_type = 'string'
content = from_address
IndicatorItem_node = ioc_api.make_IndicatorItem_node(
condition,
document,
search,
content_type,
content,
negate=negate,
preserve_case=preserve_case,
context_type=None)
return IndicatorItem_node
def make_network_uri(uri,
condition='contains',
negate=False,
preserve_case=False):
document = 'Network'
search = 'Network/URI'
content_type = 'string'
content = uri
IndicatorItem_node = ioc_api.make_IndicatorItem_node(
condition,
document,
search,
content_type,
content,
negate=negate,
preserve_case=preserve_case,
context_type=None)
return IndicatorItem_node
def create_ioc_object(ioc_name,items,and_or=True):
IOC = ioc_api.IOC(name=ioc_name)
top_level_or_node = IOC.top_level_indicator
# build the definition
if and_or:
second_level_and_node = ioc_api.make_Indicator_node('AND')
top_level_or_node.append(second_level_and_node)
for item in items:
condition, document, search, content_type, content = tuple(item)
#print condition, document, search, content_type, content
IndicatorItem_node = ioc_api.make_IndicatorItem_node(condition, document, search, content_type, content)
if and_or:
second_level_and_node.append(IndicatorItem_node)
else:
top_level_or_node.append(IndicatorItem_node)
# update the last modified time
IOC.set_lastmodified_date()
return IOC
def create_ioc_object(ioc_name, items, and_or=True):
IOC = ioc_api.IOC(name=ioc_name)
top_level_or_node = IOC.top_level_indicator
# build the definition
if and_or:
second_level_and_node = ioc_api.make_Indicator_node('AND')
top_level_or_node.append(second_level_and_node)
for item in items:
condition, document, search, content_type, content = tuple(item)
#print condition, document, search, content_type, content
IndicatorItem_node = ioc_api.make_IndicatorItem_node(
condition, document, search, content_type, content)
if and_or:
second_level_and_node.append(IndicatorItem_node)
else:
top_level_or_node.append(IndicatorItem_node)
# update the last modified time
IOC.set_lastmodified_date()
return IOC
def create_ioc_object(ioc_name,items,and_or=True):
"""This comes from William Gibb's 'sample_ioc_writer.py' mentioned in the
program's Docstring. Note: Writing IOC 1.1 files.
"""
IOC = ioc_api.IOC(name=ioc_name)
top_level_or_node = IOC.top_level_indicator
# build the definition
if and_or:
second_level_and_node = ioc_api.make_Indicator_node('AND')
top_level_or_node.append(second_level_and_node)
for item in items:
condition, document, search, content_type, content = tuple(item)
#print condition, document, search, content_type, content
IndicatorItem_node = ioc_api.make_IndicatorItem_node(
condition, document, search, content_type, content
)
if and_or:
second_level_and_node.append(IndicatorItem_node)
else:
top_level_or_node.append(IndicatorItem_node)
# update the last modified time
IOC.set_lastmodified_date()
return IOC
def createMetaData(xmldoc, parentnode, metadata):
# load in the file name. It won't always be the actual file name
# because dionaea renames it with the md5 hash...but it might
# be the actual name
#
# As well, the items here generally won't change, so they are being
# put in an AND block
and_item = ioc_api.make_Indicator_node('AND')
if metadata['malfilename'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is",
document="FileItem",
search="FileItem/FileName",
content=str(
metadata['malfilename']),
content_type="string")
and_item.append(inditem)
# file size
if metadata['malfilesize'] != "":
inditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/SizeInBytes",
content=str(metadata['malfilesize']),
content_type="int")
and_item.append(inditem)
# file md5
if metadata['malmd5'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is",
document="FileItem",
search="FileItem/Md5Sum",
content=metadata['malmd5'],
content_type="md5")
and_item.append(inditem)
# md54k (http://www.md54k.org)
# md54k is not part of Mandiant's list of indicators
# so we are using our iocaware custom list (context_type="iocaware")
# Please see the iocware.iocterms file
if metadata['malmd54k'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is",
document="FileItem",
search="FileItem/Md54ksum",
content=metadata['malmd54k'],
content_type="md5",
context_type="iocaware")
and_item.append(inditem)
if metadata['malsha1'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is",
document="FileItem",
search="FileItem/Sha1sum",
content=metadata['malsha1'],
content_type="sha1")
and_item.append(inditem)
if metadata['malsha256'] != "":
inditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/Sha256sum",
content=metadata['malsha256'],
content_type="sha256")
and_item.append(inditem)
# sha512 is not included in the list of OpenIOC indicators
# so the context_type="iocware" - please see the iocaware.iocterms file
if metadata["malsha512"] != "":
inditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/Sha512sum",
content=metadata['malsha512'],
content_type="sha512",
context_type="iocaware")
and_item.append(inditem)
# SSDeep also isn't included in the list of OpenIOC indicators
if metadata["malssdeep"] != "":
inditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/Ssdeep",
content=metadata["malssdeep"],
content_type="ssdeep",
context_type="iocaware")
and_item.append(inditem)
if metadata['malfiletype'] != "":
inditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/PEInfo/Type",
content=metadata['malfiletype'],
content_type="string")
and_item.append(inditem)
parentnode.append(and_item)
peinfoind = ioc_api.make_Indicator_node("OR")
if len(metadata['iocimports']) > 0:
for importfunc in metadata['iocimports']:
importinditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search=
"FileItem/PEInfo/ImportedModules/Module/ImportedFunctions/string",
content=importfunc,
content_type="string")
peinfoind.append(importinditem)
if len(metadata['iocexports']) > 0:
for exportfunc in metadata['iocexports']:
exportinditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/PEInfo/Exports/ExportedFunctions/string",
content=exportfunc,
content_type="string")
peinfoind.append(exportinditem)
if len(metadata['badpesections']) > 0:
for section in metadata['badpesections']:
sectionind = ioc_api.make_Indicator_node("AND")
sectioninditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/PEInfo/Sections/Section/Name",
content=section[0],
content_type="string")
sectionind.append(sectioninditem)
sectioninditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/PEInfo/Sections/Section/SizeInBytes",
content=str(section[1]),
content_type="int")
sectionind.append(sectioninditem)
sectioninditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search=
"FileItem/PEInfo/Sections/Section/Entropy/CurveData/float",
content=str(section[2]),
content_type="float")
sectionind.append(sectioninditem)
peinfoind.append(sectionind)
# Include any PE Version Information
if len(metadata['versioninfo']) > 0:
infoind = ioc_api.make_Indicator_node("AND")
for infoitem in metadata['versioninfo']:
if metadata['versioninfo'][infoitem] != "" and metadata[
'versioninfo'][infoitem] is not None:
if "Version" in infoitem:
itemvalue = str(metadata['versioninfo'][infoitem]).replace(
", ", ".")
else:
itemvalue = str(metadata['versioninfo'][infoitem])
infoitemsearch = "FileItem/PEInfo/VersionInfoItem/" + infoitem
infoinditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search=infoitemsearch,
content=str(itemvalue),
content_type="string")
infoind.append(infoinditem)
peinfoind.append(infoind)
parentnode.append(peinfoind)
def createDynamicIndicators(xmldoc, parentnode, dynamicindicators):
filescreated = False
processesstarted = False
regkeyscreated = False
mutexescreated = False
hostscontacted = False
hasdynamicindicators = False
# Here we are just testing to see if the report had any
# of the various dynamic indicator types so we know whether
# or not to process them at all
if len(dynamicindicators['droppedfiles']) > 0:
filescreated = True
hasdynamicindicators = True
if len(dynamicindicators['processes']) > 0:
processesstarted = True
hasdynamicindicators = True
if len(dynamicindicators['regkeys']) > 0:
regkeyscreated = True
hasdynamicindicators = True
if len(dynamicindicators['mutexes']) > 0:
mutexescreated = True
hasdynamicindicators = True
if len(dynamicindicators['hosts']) > 0:
hostscontacted = True
hasdynamicindicators = True
if not hasdynamicindicators:
return
ind = ioc_api.make_Indicator_node("OR")
if filescreated:
createdfilesind = ioc_api.make_Indicator_node("OR")
for createdfile in dynamicindicators['droppedfiles']:
createdfilesinditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="FileItem",
search="FileItem/FilenameCreated",
content=createdfile[0],
content_type="string")
createdfilesind.append(createdfilesinditem)
ind.append(createdfilesind)
if processesstarted:
processesind = ioc_api.make_Indicator_node("OR")
for process in dynamicindicators['processes']:
startedprocessesind = ioc_api.make_Indicator_node("AND")
# Process name
startedprocessesitem = ioc_api.make_IndicatorItem_node(
condition="is",
document="ProcessItem",
search="ProcessItem/name",
content=process[0],
content_type="string")
startedprocessesind.append(startedprocessesitem)
# Process pid
startedprocessesitem = ioc_api.make_IndicatorItem_node(
condition="is",
document="ProcessItem",
search="ProcessItem/pid",
content=str(process[1]),
content_type="int")
startedprocessesind.append(startedprocessesitem)
# Process parent pid
startedprocessesitem = ioc_api.make_IndicatorItem_node(
condition="is",
document="ProcessItem",
search="ProcessItem/parentpid",
content=str(process[2]),
content_type="int")
startedprocessesind.append(startedprocessesitem)
processesind.append(startedprocessesind)
ind.append(processesind)
if regkeyscreated:
regkeyind = ioc_api.make_Indicator_node("AND")
for regkey in dynamicindicators['regkeys']:
createdregkeysind = ioc_api.make_IndicatorItem_node(
condition="is",
document="RegistryItem",
search="RegistryItem/KeyPath",
content=regkey,
content_type="string")
regkeyind.append(createdregkeysind)
ind.append(regkeyind)
if mutexescreated:
mutexkeyind = ioc_api.make_Indicator_node("OR")
for mutex in dynamicindicators['mutexes']:
createdmutexesind = ioc_api.make_IndicatorItem_node(
condition="contains",
document="ProcessItem",
search="ProcessItem/HandList/Handl/Name",
content=mutex,
content_type="string")
mutexkeyind.append(createdmutexesind)
ind.append(mutexkeyind)
if hostscontacted:
hostsind = ioc_api.make_Indicator_node("OR")
for host in dynamicindicators['hosts']:
hostsinditem = ioc_api.make_IndicatorItem_node(
condition="is",
document="PortItem",
search="PortItem/remoteIP",
content=host,
content_type="string")
hostsind.append(hostsinditem)
ind.append(hostsind)
parentnode.append(ind)
return
def convert_branch(self, old_node, new_node, ids_to_skip, comment_dict = None):
'''
convert_branch
recursively walk a indicator logic tree, starting from a Indicator node.
converts OpenIOC 1.1 Indicator/IndicatorItems to Openioc 1.0 and preserves order.
input
old_node: old node, an Indicator node, which we walk down to convert
new_node: new node, an Indicator node, which we add new IndicatorItem and Indicator nodes too
ids_to_skip: set of ids not to convert
comment_dict: maps ids to comment values. only applied to IndicatorItem nodes
return
returns True upon completiong
may raise ValueError
'''
expected_tag = 'Indicator'
if old_node.tag != expected_tag:
raise ValueError('old_node expected tag is [%s]' % expected_tag)
for node in old_node.getchildren():
node_id = node.get('id')
if node_id in ids_to_skip:
continue
if node.tag == 'IndicatorItem':
negation = node.get('negate')
condition = node.get('condition')
if 'true' in negation.lower():
new_condition = condition + 'not'
else:
new_condition = condition
document = node.xpath('Context/@document')[0]
search = node.xpath('Context/@search')[0]
content_type = node.xpath('Content/@type')[0]
content = node.findtext('Content')
context_type = node.xpath('Context/@type')[0]
new_II_node = ioc_api.make_IndicatorItem_node(condition = condition,
document = document,
search = search,
content_type = content_type,
content = content,
context_type = context_type,
id = node_id)
# set condition
new_II_node.attrib['condition'] = new_condition
# set comment
if node_id in comment_dict:
comment = comment_dict[node_id]
comment_node = et.Element('Comment')
comment_node.text = comment
new_II_node.append(comment_node)
# remove preserver-case and negate
del new_II_node.attrib['negate']
del new_II_node.attrib['preserve-case']
new_node.append(new_II_node)
elif node.tag == 'Indicator':
operator = node.get('operator')
if operator.upper() not in ['OR', 'AND']:
raise IOCParseError('Indicator@operator is not AND/OR. [%s] has [%s]' % (node_id, operator) )
new_I_node = ioc_api.make_Indicator_node(operator, node_id)
new_node.append(new_I_node)
self.convert_branch(node, new_I_node, ids_to_skip, comment_dict)
else:
# should never get here
raise IOCParseError('node is not a Indicator/IndicatorItem')
return True
def createMetaData(xmldoc, parentnode, metadata):
# load in the file name. It won't always be the actual file name
# because dionaea renames it with the md5 hash...but it might
# be the actual name
#
# As well, the items here generally won't change, so they are being
# put in an AND block
and_item = ioc_api.make_Indicator_node('AND')
if metadata['malfilename'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/FileName", content=str(metadata['malfilename']), content_type="string")
and_item.append(inditem)
# file size
if metadata['malfilesize'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/SizeInBytes", content=str(metadata['malfilesize']), content_type="int")
and_item.append(inditem)
# file md5
if metadata['malmd5'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Md5Sum", content=metadata['malmd5'], content_type="md5")
and_item.append(inditem)
# md54k (http://www.md54k.org)
# md54k is not part of Mandiant's list of indicators
# so we are using our iocaware custom list (context_type="iocaware")
# Please see the iocware.iocterms file
if metadata['malmd54k'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Md54ksum", content=metadata['malmd54k'], content_type="md5", context_type="iocaware")
and_item.append(inditem)
if metadata['malsha1'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Sha1sum", content=metadata['malsha1'], content_type="sha1")
and_item.append(inditem)
if metadata['malsha256'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Sha256sum", content=metadata['malsha256'], content_type="sha256")
and_item.append(inditem)
# sha512 is not included in the list of OpenIOC indicators
# so the context_type="iocware" - please see the iocaware.iocterms file
if metadata["malsha512"] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Sha512sum", content=metadata['malsha512'], content_type="sha512", context_type="iocaware")
and_item.append(inditem)
# SSDeep also isn't included in the list of OpenIOC indicators
if metadata["malssdeep"] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/Ssdeep", content=metadata["malssdeep"], content_type="ssdeep", context_type="iocaware")
and_item.append(inditem)
if metadata['malfiletype'] != "":
inditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/Type", content=metadata['malfiletype'], content_type="string")
and_item.append(inditem)
parentnode.append(and_item)
peinfoind = ioc_api.make_Indicator_node("OR")
if len(metadata['iocimports']) > 0:
for importfunc in metadata['iocimports']:
importinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/ImportedModules/Module/ImportedFunctions/string", content=importfunc, content_type="string")
peinfoind.append(importinditem)
if len(metadata['iocexports']) > 0:
for exportfunc in metadata['iocexports']:
exportinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/Exports/ExportedFunctions/string", content=exportfunc, content_type="string")
peinfoind.append(exportinditem)
if len(metadata['badpesections']) > 0:
for section in metadata['badpesections']:
sectionind = ioc_api.make_Indicator_node("AND")
sectioninditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/Sections/Section/Name", content=section[0], content_type="string")
sectionind.append(sectioninditem)
sectioninditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/Sections/Section/SizeInBytes", content=str(section[1]), content_type="int")
sectionind.append(sectioninditem)
sectioninditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/PEInfo/Sections/Section/Entropy/CurveData/float", content=str(section[2]), content_type="float")
sectionind.append(sectioninditem)
peinfoind.append(sectionind)
# Include any PE Version Information
if len(metadata['versioninfo']) > 0:
infoind = ioc_api.make_Indicator_node("AND")
for infoitem in metadata['versioninfo']:
if metadata['versioninfo'][infoitem] != "" and metadata['versioninfo'][infoitem] is not None:
if "Version" in infoitem:
itemvalue = str(metadata['versioninfo'][infoitem]).replace(", ", ".")
else:
itemvalue = str(metadata['versioninfo'][infoitem])
infoitemsearch = "FileItem/PEInfo/VersionInfoItem/" + infoitem
infoinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search=infoitemsearch, content=str(itemvalue), content_type="string")
infoind.append(infoinditem)
peinfoind.append(infoind)
parentnode.append(peinfoind)
def createDynamicIndicators(xmldoc, parentnode, dynamicindicators):
filescreated = False
processesstarted = False
regkeyscreated = False
mutexescreated = False
hostscontacted = False
hasdynamicindicators = False
# Here we are just testing to see if the report had any
# of the various dynamic indicator types so we know whether
# or not to process them at all
if len(dynamicindicators['droppedfiles']) > 0:
filescreated = True
hasdynamicindicators = True
if len(dynamicindicators['processes']) > 0:
processesstarted = True
hasdynamicindicators = True
if len(dynamicindicators['regkeys']) > 0:
regkeyscreated = True
hasdynamicindicators = True
if len(dynamicindicators['mutexes']) > 0:
mutexescreated = True
hasdynamicindicators = True
if len(dynamicindicators['hosts']) > 0:
hostscontacted = True
hasdynamicindicators = True
if not hasdynamicindicators:
return
ind = ioc_api.make_Indicator_node("OR")
if filescreated:
createdfilesind = ioc_api.make_Indicator_node("OR")
for createdfile in dynamicindicators['droppedfiles']:
createdfilesinditem = ioc_api.make_IndicatorItem_node(condition="is", document="FileItem", search="FileItem/FilenameCreated", content=createdfile[0], content_type="string")
createdfilesind.append(createdfilesinditem)
ind.append(createdfilesind)
if processesstarted:
processesind = ioc_api.make_Indicator_node("OR")
for process in dynamicindicators['processes']:
startedprocessesind = ioc_api.make_Indicator_node("AND")
# Process name
startedprocessesitem = ioc_api.make_IndicatorItem_node(condition="is", document="ProcessItem", search="ProcessItem/name", content=process[0], content_type="string")
startedprocessesind.append(startedprocessesitem)
# Process pid
startedprocessesitem = ioc_api.make_IndicatorItem_node(condition="is", document="ProcessItem", search="ProcessItem/pid", content=str(process[1]), content_type="int")
startedprocessesind.append(startedprocessesitem)
# Process parent pid
startedprocessesitem = ioc_api.make_IndicatorItem_node(condition="is", document="ProcessItem", search="ProcessItem/parentpid", content=str(process[2]), content_type="int")
startedprocessesind.append(startedprocessesitem)
processesind.append(startedprocessesind)
ind.append(processesind)
if regkeyscreated:
regkeyind = ioc_api.make_Indicator_node("AND")
for regkey in dynamicindicators['regkeys']:
createdregkeysind = ioc_api.make_IndicatorItem_node(condition="is", document="RegistryItem", search="RegistryItem/KeyPath", content=regkey, content_type="string")
regkeyind.append(createdregkeysind)
ind.append(regkeyind)
if mutexescreated:
mutexkeyind = ioc_api.make_Indicator_node("OR")
for mutex in dynamicindicators['mutexes']:
createdmutexesind = ioc_api.make_IndicatorItem_node(condition="contains", document="ProcessItem", search="ProcessItem/HandList/Handl/Name", content=mutex, content_type="string")
mutexkeyind.append(createdmutexesind)
ind.append(mutexkeyind)
if hostscontacted:
hostsind = ioc_api.make_Indicator_node("OR")
for host in dynamicindicators['hosts']:
hostsinditem = ioc_api.make_IndicatorItem_node(condition="is", document="PortItem", search="PortItem/remoteIP", content=host, content_type="string")
hostsind.append(hostsinditem)
ind.append(hostsind)
parentnode.append(ind)
return
