""ET TROJAN Gamaredon Information Stealer Data Exfiltration Attempt""

SID: 2038907

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_09_20, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_01_31, reviewed_at 2024_04_17

Reference:

  • md5

  • b34760b85a6cfd9f31a05e76fa8589a6

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: "Mozilla/1.0"

  • Value: "multipart/form-data|3b 20|boundary|3d 2d 2d 2d 2d|"

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

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|C|3a 5c|"

Within:

PCRE: "/[A-Z0-9]{12}/Ri"

Special Options:

  • http_method

  • fast_pattern

  • http_header

  • http_client_body

  • http_client_body

source