""ET TROJAN ClickFix CnC Activity (POST)""

SID: 2053774

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2024_06_20, deployment Perimeter, deployment SSLDecrypt, malware_family ClickFix, confidence High, signature_severity Major, tag c2, updated_at 2024_06_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

• Link

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: "/endpoint"

• Value: "|7b 22|website|22 3a 22|" Depth: 12

• Value: "referer|3a 20|"

Within:

PCRE: "/^referer\x3a\x20[^\r\n]+[\r\n]+$/Hm"

Special Options:

• http_method

• http_uri

• http_client_body

• fast_pattern

• http_header

source