""ET TROJAN Gamaredon CnC Checkin (POST)""

SID: 2055530

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_08_27, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Critical, tag Gamaredon, updated_at 2024_08_27

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: ".php"

  • Value: "ilogin=" Depth: 7

Within:

PCRE: "/^ilogin=[A-Z0-9]{8}\x253b[a-z0-9]{10}$/P"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • fast_pattern

source