""ET TROJAN JavaScriptBackdoor HTTP GET CnC Beacon""

SID: 2021132

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_05_21, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_05_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 154e76a480b22cf24ddac4d2d59c22fe

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/?action="

  • Value: "&guid="

  • Value: "&version="

  • Value: "WinHttp.WinHttpRequest."

  • Value: !"Referer|3a|"

Within:

PCRE: "/&version=\d+$/U"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_header

  • http_header

source