SID: 2042538

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_12_09, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2022_12_09

Reference:

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: "/chunky/"

  • Value: ".gif"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/.gif$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

source