""ET TROJAN Win32/Screenshotter Backdoor CnC Activity (GET)""

SID: 2043240

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_01_09, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2023_01_09

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "-ds2"

  • Value: "Cache|2d|Control|3a 20|no|2d|cache"

  • Value: "Cache|2d|Control|3a 20|no|2d|cache"

  • Value: !"Referer|3a 20|"

  • Value: "User|2d|Agent|3a 20|AutoHotkey|0d 0a|"

Within:

PCRE: "/^\/[0-9]{10}-ds2$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

source