""ET USER_AGENTS Observed Malicious User-Agent (CobaltStrike)""
SID: 2035537
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2022_03_18, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2022_03_18, reviewed_at 2024_05_07, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation
Reference:
-
md5
-
b8b7a10dcc0dad157191620b5d4e5312
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: to_server,established
Contents:
- Value: "User-Agent|3a 20|Mozilla/5.0_Frsg_stredf_o21_crown_type"
Within:
PCRE:
Special Options:
-
fast_pattern
-
http_header