""ET TROJAN CozyDuke APT HTTP POST CnC Beacon""

SID: 2020964

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, former_category MALWARE, signature_severity Major, tag c2, updated_at 2020_09_30, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

• md5

• 98a6484533fa12a9ba6b1bd9df1899dc

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: ".php?"

• Value: !"Accept"

• Value: !"Referer|3a|"

• Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|User-Agent|3a 20|" Depth: 61

Within:

PCRE: "/^\w+=(?:[a-zA-Z0-9/+=]{1,30}&\w+=)?[a-zA-Z0-9+/]{0,13}[A-Z]{200}/P"

Special Options:

• http_method

• http_uri

• http_header

• http_header

• http_header

source