""ET TROJAN [SEKOIA.IO] Win32/Stealc C2 Check-in""

SID: 2044243

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_02_20, deployment Perimeter, malware_family Stealc, signature_severity Major, tag Stealer, updated_at 2023_02_20

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: "form-data|3b 20|name=|22|hwid|22|"

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name=|22|build|22|"

  • Value: "multipart/form-data|3b 20|boundary=----"

Within:

PCRE: "/^\/\w+.php$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source