""ET TROJAN ClearFake CnC Activity Outbound (source_id)""

SID: 2053415

Revision: 2

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_10, deployment Perimeter, deployment SSLDecrypt, malware_family ClearFake, confidence High, signature_severity Major, tag c2, updated_at 2024_06_18, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol

Reference:

  • md5

  • b3b735852084909f82121fd6fbbdeb68

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: "|7b 0d 0a 20 20 20 20 22|source|5f|id|22 3a 20 20 22|" Depth: 22

  • Value: "Content|3a 20|application/json|0d 0a|"

  • Value: "|22 0d 0a 7d|"

Within:

PCRE: "/.php$/U"

Special Options:

  • http_method

  • http_client_body

  • fast_pattern

  • http_header

  • http_client_body

source