""ET TROJAN GCleaner Downloader - Payload Response""

SID: 2044037

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 2022_12_06, deployment Perimeter, malware_family GCleaner, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_01_31, former_sid 2852925

Reference:

  • md5

  • 780099266c4cf79fbf344297b0a4e29e

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: $HTTP_PORTS

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "dllENCR.dll|22 3b 0d 0a|"

  • Value: "Content-Transfer-Encoding|3a 20|binary|0d 0a|"

  • Value: "Content-Type|3a 20|application/octet-stream|0d 0a|"

Within:

PCRE: "/^Content-Disposition\x3a\x20attachment\x3b\x20filename\x3d\x22[a-zA-Z0-9]+dllENCR.dll\x22\x3b[\r\n]+$/Hmi"

Special Options:

  • http_header

  • fast_pattern

  • http_header

  • http_header

source