""ET TROJAN Cobalt Strike Related Activity (POST)""

SID: 2035547

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_03_21, deployment Perimeter, malware_family Cobalt_Strike, signature_severity Major, updated_at 2022_03_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/submit.php?id=" Depth: 15

  • Value: "|3b 20|MANM|3b 20|MANM)|0d 0a|"

  • Value: !"Referer|3a|"

  • Value: !"Cookie|3a 20|"

Within:

PCRE: "/Host\x3a\x20\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}$/Hm"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

source