""ET TROJAN Cobalt Strike CnC Beacon (POST)""

SID: 2045857

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_05_24, deployment Perimeter, malware_family Cobalt_Strike, confidence High, signature_severity Major, updated_at 2023_05_24

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: "/mobile-home"

  • Value: "Cache-Control|3a 20|no-cache|0d 0a|"

  • Value: "|5f 5f|session|5f 5f|id|3d|" Depth: 14

  • Value: "Content-Type|3a 20|text/plain|0d 0a|"

  • Value: !"|0d 0a|Referer|3a 20|"

  • Value: "Connection|3a 20|Close|0d 0a|"

  • Value: "Accept|3a 20 2a 2f 2a 0d 0a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_cookie

  • http_header

  • http_header

  • http_header

  • http_header

source