""ET TROJAN PunkeyPOS HTTP CnC Beacon 4""

SID: 2020938

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_04_17, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_04_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 43c277dd56f9c6de4b8dc249e12039df

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: "/"

Offset: 1

  • Value: !"Accept|3a|"

  • Value: !"Referer|3a|"

  • Value: "unkey=" Depth: 6

  • Value: !"&"

Within:

PCRE: "/\/$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_client_body

  • fast_pattern

  • http_client_body

source