""ET TROJAN Cobalt Strike Beacon Activity""

SID: 2032362

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_04_01, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, tag c2, updated_at 2023_09_12, reviewed_at 2024_03_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • db9214c2f8340ceba664800481f0ca08

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: ".gif?utmac="

  • Value: "&utmcn="

  • Value: "&utmcs="

  • Value: !"Referer|3a 20|"

  • Value: !"referer|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_uri

  • http_uri

  • http_header

  • http_header

source