""ET TROJAN Brosql Stealer Screenshot Exfil""

SID: 2050283

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_01_22, deployment Perimeter, malware_family Stealer, performance_impact Low, confidence High, signature_severity Critical, updated_at 2024_01_22, reviewed_at 2024_06_28

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: "/api/userID/" Depth: 12

  • Value: "/file/screenshot.bmp"

  • Value: "BM6" Depth: 3

  • Value: "application/octet-stream"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^Content-Type\x3a\x20[^\r\n]*application\/octet-stream/Hmi"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_client_body

  • http_header

  • http_header

source