""ET TROJAN Observed Malicious SSL Cert (FIN8 ShellTea CnC)""

SID: 2027463

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2019_06_13, deployment Perimeter, malware_family ShellTea, performance_impact Low, signature_severity Major, tag SSL_Malicious_Cert, tag FIN8, updated_at 2019_06_13, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

• Link

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: from_server,established

Contents:

• Value: "|16|"

• Value: "|0b|"

• Value: "|BF 98 15 9B 69 48 D8 F8|"

Within: 8

PCRE:

Special Options:

• fast_pattern

source