""ET TROJAN Dridex POST CnC Beacon 2""

SID: 2020301

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_01_23, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_02_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • b9de687cdae55d3c9fcfe6fc8bcdd28f

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: !"Referer|3A|"

  • Value: "HTTP/1.1|0d 0a|Host|3a 20|"

  • Value: "Content-Type|3a 20|text/css|0d 0a|Accept|3a 20|image/**|0d 0a|"

  • Value: "|0d 0a 0d 0a|"

Within:

PCRE: "/^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}(?:\x3a\d{1,5})?\r\n/Rmi"

Special Options:

  • http_method

  • http_header

  • http_header

source