""ET TROJAN ServHelper CnC Inital Checkin""

SID: 2026772

Revision: 3

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_04, deployment Perimeter, signature_severity Major, tag ServHelper, updated_at 2019_04_01

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: "key=" Depth: 4

  • Value: "&sysid="

  • Value: "&resp="

  • Value: "&misc="

Within:

PCRE:

Special Options:

  • http_method

  • nocase

  • http_client_body

  • nocase

  • fast_pattern

  • http_client_body

  • nocase

  • http_client_body

  • http_client_body

source