""ET TROJAN Cobalt Strike Activity (GET)""

SID: 2035130

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_02_08, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, signature_severity Major, updated_at 2022_04_18, reviewed_at 2023_08_25

Reference:

  • md5

  • b4c716f08907cd4e848bb9ab541dc449

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: ".html?provider="

  • Value: "Windows|20|NT|20|7.1|3b 20|"

  • Value: "wordpress_" Depth: 10

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+Windows\x20NT\x207.1\x3b\x20/Hmi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_cookie

  • http_header

source