""ET TROJAN GanDownloader CnC Checkin""

SID: 2026946

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_20, deployment Perimeter, former_category MALWARE, performance_impact Moderate, signature_severity Major, updated_at 2022_03_24

Reference:

  • md5

  • 8f0017ed89c2f6639cc2a08bc1e83f1e

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: "|2f 00 00 00|" Depth: 4

  • Value: "_"

  • Value: "202020202020|00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00|"

  • Value: !"Referer|3a|"

  • Value: !"Accept|3a|"

  • Value: !"User-Agent|3a|"

Within:

PCRE: "/^\x2f\x00{3}[A-Z0-9]{6}_[a-f0-9]+\x00{16}$/Ps"

Special Options:

  • http_method

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_header

  • http_header

  • http_header

source