""ET TROJAN W32/ServStart.Variant CnC Beacon""

SID: 2016355

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2013_02_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2013_02_05, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "&mac="

  • Value: "type="

  • Value: "id="

  • Value: "User-Agent|3A| Google ++|0D 0A|"

Within:

PCRE:

Special Options:

  • http_uri

  • nocase

  • http_uri

  • nocase

  • http_uri

  • nocase

  • http_header

source