def convert_indicator(indicator20):
indicator1x = Indicator(id_=convert_id20(indicator20["id"]),
timestamp=text_type(indicator20["modified"]))
if "name" in indicator20:
indicator1x.title = indicator20["name"]
if "description" in indicator20:
indicator1x.add_description(indicator20["description"])
indicator1x.indicator_types = convert_open_vocabs_to_controlled_vocabs(
indicator20["labels"], INDICATOR_LABEL_MAP)
indicator1x.add_valid_time_position(
convert_to_valid_time(
text_type(indicator20["valid_from"]),
text_type(indicator20["valid_until"])
if "valid_until" in indicator20 else None))
indicator1x.add_observable(
create_pattern_object(
indicator20["pattern"]).toSTIX1x(id20=indicator20["id"]))
if "kill_chain_phases" in indicator20:
process_kill_chain_phases(indicator20["kill_chain_phases"],
indicator1x)
if "object_marking_refs" in indicator20:
for m_id in indicator20["object_marking_refs"]:
ms = create_marking_specification(m_id)
if ms:
CONTAINER.add_marking(indicator1x, ms, descendants=True)
if "granular_markings" in indicator20:
error(
"Granular Markings present in '%s' are not supported by stix2slider",
604, indicator20["id"])
record_id_object_mapping(indicator20["id"], indicator1x)
return indicator1x
def main():
# NOTE: ID values will differ due to being regenerated on each script execution
pkg1 = STIXPackage()
pkg1.title = "Example of Indicator Composition for an aggregate indicator composition"
# USE CASE: Indicator with aggregate pattern
# Add TTP for malware usage
malware_ttp = TTP()
malware_ttp.behavior = Behavior()
malware = MalwareInstance()
malware.title = "foobar malware"
malware.add_type("Remote Access Trojan")
malware_ttp.behavior.add_malware_instance(malware)
c2_ttp = TTP()
c2_ttp.resources = Resource()
c2_ttp.resources.infrastructure = Infrastructure()
c2_ttp.resources.infrastructure.add_type(VocabString("Malware C2"))
pkg1.add_ttp(c2_ttp)
pkg1.add_ttp(malware_ttp)
nw_ind = Indicator()
nw_ind.description = "Indicator for a particular C2 infstructure IP address."
# add network network connection to this indicator
obs = NetworkConnection()
sock = SocketAddress()
sock.ip_address = "46.123.99.25"
sock.ip_address.category = "ipv4-addr"
sock.ip_address.condition = "Equals"
obs.destination_socket_address = sock
nw_ind.add_observable(obs)
nw_ind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
# create File Hash indicator w/ embedded Observable
file_ind = Indicator()
file_ind.description = "Indicator for the hash of the foobar malware."
file_ind.add_indicator_type("File Hash Watchlist")
file_obs = File()
file_obs.add_hash("01234567890abcdef01234567890abcdef")
file_obs.hashes[0].type_ = "MD5"
file_obs.hashes[0].type_.condition = "Equals"
file_ind.add_observable(file_obs)
# create references
file_ind.add_indicated_ttp(TTP(idref=malware_ttp.id_))
# create container indicator
ind = Indicator()
ind.add_indicator_type(VocabString("Campaign Characteristics"))
ind.description = "Indicator for a composite of characteristics for the use of specific malware and C2 infrastructure within a Campaign."
# Add campaign with related
camp = Campaign()
camp.title = "holy grail"
pkg1.add_campaign(camp)
camp.related_ttps.append(TTP(idref=c2_ttp.id_))
camp.related_ttps.append(TTP(idref=malware_ttp.id_))
# Add threat actor
ta = ThreatActor()
ta.identity = Identity()
ta.identity.name = "boobear"
ta.observed_ttps.append(TTP(idref=malware_ttp.id_))
pkg1.add_threat_actor(ta)
# Create composite expression
ind.composite_indicator_expression = CompositeIndicatorExpression()
ind.composite_indicator_expression.operator = "AND"
ind.composite_indicator_expression.append(file_ind)
ind.composite_indicator_expression.append(nw_ind)
pkg1.add_indicator(ind)
print pkg1.to_xml()
# USE CASE: Indicator with partial matching
pkg2 = STIXPackage()
pkg2.title = "Example of Indicator Composition for a one of many indicator composition"
# create container indicator
watchlistind = Indicator()
watchlistind.add_indicator_type("IP Watchlist")
watchlistind.description = "This Indicator specifies a pattern where any one or more of a set of three IP addresses are observed."
watchlistind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
# Create composite expression
watchlistind.composite_indicator_expression = CompositeIndicatorExpression()
watchlistind.composite_indicator_expression.operator = "OR"
ips = ['23.5.111.68', '23.5.111.99', '46.123.99.25']
for ip in ips:
new_ind = Indicator()
new_ind.description = "This Indicator specifies a pattern where one specific IP address is observed"
# add network network connection to this indicator
obs = Address()
obs.address_value = ip
obs.address_value.condition = "Equals"
new_ind.add_observable(obs)
new_ind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
watchlistind.composite_indicator_expression.append(new_ind)
pkg2.add_indicator(watchlistind)
print pkg2.to_xml()
# USE CASE: Indicator with compound detection
pkg3 = STIXPackage()
pkg3.title = "Example of Indicator Composition for compound detection"
# create container indicator
watchlistind2 = Indicator()
watchlistind2.add_indicator_type("IP Watchlist")
watchlistind2.description = "This Indicator specifies a composite condition of two preexisting Indicators (each identifying a particular TTP with low confidence) that in aggregate identify the particular TTP with high confidence."
# Create composite expression
watchlistind2.composite_indicator_expression = CompositeIndicatorExpression()
watchlistind2.composite_indicator_expression.operator = "OR"
watchlistind2.add_indicated_ttp(TTP(idref=c2_ttp.id_))
watchlistind2.confidence = "High"
nw_ind.description = "Indicator for a particular C2 IP address used by a malware variant."
nw_ind.confidence = "Low"
nw_ind.indicator_types = ["C2"]
file_ind.description = "Indicator that contains malicious file hashes for a particular malware variant."
file_ind.confidence = "Low"
watchlistind2.composite_indicator_expression.append(nw_ind)
watchlistind2.composite_indicator_expression.append(file_ind)
pkg3.add_indicator(watchlistind2)
print pkg3.to_xml()
def main():
# NOTE: ID values will differ due to being regenerated on each script execution
pkg1 = STIXPackage()
pkg1.title = "Example of Indicator Composition for an aggregate indicator composition"
# USE CASE: Indicator with aggregate pattern
# Add TTP for malware usage
malware_ttp = TTP()
malware_ttp.behavior = Behavior()
malware = MalwareInstance()
malware.title = "foobar malware"
malware.add_type("Remote Access Trojan")
malware_ttp.behavior.add_malware_instance(malware)
c2_ttp = TTP()
c2_ttp.resources = Resource()
c2_ttp.resources.infrastructure = Infrastructure()
c2_ttp.resources.infrastructure.add_type(VocabString("Malware C2"))
pkg1.add_ttp(c2_ttp)
pkg1.add_ttp(malware_ttp)
nw_ind = Indicator()
nw_ind.description = "Indicator for a particular C2 infstructure IP address."
# add network network connection to this indicator
obs = NetworkConnection()
sock = SocketAddress()
sock.ip_address = "46.123.99.25"
sock.ip_address.category = "ipv4-addr"
sock.ip_address.condition = "Equals"
obs.destination_socket_address = sock
nw_ind.add_observable(obs)
nw_ind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
# create File Hash indicator w/ embedded Observable
file_ind = Indicator()
file_ind.description = "Indicator for the hash of the foobar malware."
file_ind.add_indicator_type("File Hash Watchlist")
file_obs = File()
file_obs.add_hash("01234567890abcdef01234567890abcdef")
file_obs.hashes[0].type_ = "MD5"
file_obs.hashes[0].type_.condition = "Equals"
file_ind.add_observable(file_obs)
# create references
file_ind.add_indicated_ttp(TTP(idref=malware_ttp.id_))
# create container indicator
ind = Indicator()
ind.add_indicator_type(VocabString("Campaign Characteristics"))
ind.description = "Indicator for a composite of characteristics for the use of specific malware and C2 infrastructure within a Campaign."
# Add campaign with related
camp = Campaign()
camp.title = "holy grail"
pkg1.add_campaign(camp)
camp.related_ttps.append(TTP(idref=c2_ttp.id_))
camp.related_ttps.append(TTP(idref=malware_ttp.id_))
# Add threat actor
ta = ThreatActor()
ta.identity = Identity()
ta.identity.name = "boobear"
ta.observed_ttps.append(TTP(idref=malware_ttp.id_))
pkg1.add_threat_actor(ta)
# Create composite expression
ind.composite_indicator_expression = CompositeIndicatorExpression()
ind.composite_indicator_expression.operator = "AND"
ind.composite_indicator_expression.append(file_ind)
ind.composite_indicator_expression.append(nw_ind)
pkg1.add_indicator(ind)
print pkg1.to_xml()
# USE CASE: Indicator with partial matching
pkg2 = STIXPackage()
pkg2.title = "Example of Indicator Composition for a one of many indicator composition"
# create container indicator
watchlistind = Indicator()
watchlistind.add_indicator_type("IP Watchlist")
watchlistind.description = "This Indicator specifies a pattern where any one or more of a set of three IP addresses are observed."
watchlistind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
# Create composite expression
watchlistind.composite_indicator_expression = CompositeIndicatorExpression(
)
watchlistind.composite_indicator_expression.operator = "OR"
ips = ['23.5.111.68', '23.5.111.99', '46.123.99.25']
for ip in ips:
new_ind = Indicator()
new_ind.description = "This Indicator specifies a pattern where one specific IP address is observed"
# add network network connection to this indicator
obs = Address()
obs.address_value = ip
obs.address_value.condition = "Equals"
new_ind.add_observable(obs)
new_ind.add_indicated_ttp(TTP(idref=c2_ttp.id_))
watchlistind.composite_indicator_expression.append(new_ind)
pkg2.add_indicator(watchlistind)
print pkg2.to_xml()
# USE CASE: Indicator with compound detection
pkg3 = STIXPackage()
pkg3.title = "Example of Indicator Composition for compound detection"
# create container indicator
watchlistind2 = Indicator()
watchlistind2.add_indicator_type("IP Watchlist")
watchlistind2.description = "This Indicator specifies a composite condition of two preexisting Indicators (each identifying a particular TTP with low confidence) that in aggregate identify the particular TTP with high confidence."
# Create composite expression
watchlistind2.composite_indicator_expression = CompositeIndicatorExpression(
)
watchlistind2.composite_indicator_expression.operator = "OR"
watchlistind2.add_indicated_ttp(TTP(idref=c2_ttp.id_))
watchlistind2.confidence = "High"
nw_ind.description = "Indicator for a particular C2 IP address used by a malware variant."
nw_ind.confidence = "Low"
nw_ind.indicator_types = ["C2"]
file_ind.description = "Indicator that contains malicious file hashes for a particular malware variant."
file_ind.confidence = "Low"
watchlistind2.composite_indicator_expression.append(nw_ind)
watchlistind2.composite_indicator_expression.append(file_ind)
pkg3.add_indicator(watchlistind2)
print pkg3.to_xml()
