""ET TROJAN Cobalt Strike Beacon (Bing Profile)""

SID: 2032354

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_03_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2021_03_30, reviewed_at 2023_08_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 18b0ca0508f92c5ac6e75b9865b77a51

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/search/?q=" Depth: 11

  • Value: "&go=Search&qs=bs&form="

  • Value: "DUP=" Depth: 4

  • Value: "&T="

  • Value: "&A="

  • Value: "&IG"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/\&IG$/C"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_cookie

  • http_cookie

  • http_cookie

  • http_cookie

  • http_header

source