""ET TROJAN W32/Echmark CnC Activity M2""

SID: 2031748

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_03_02, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2021_03_02

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "HEAD"

  • Value: ".php?u="

  • Value: "_"

  • Value: "&i="

  • Value: "User-Agent|3a 20|Microsoft BITS/"

Within:

PCRE:

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_uri

  • http_uri

  • http_header

source