""ET TROJAN Ransomware Locky CnC Beacon""

SID: 2022665

Revision: 4

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_03_28, deployment Perimeter, signature_severity Major, tag c2, updated_at 2016_03_28, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 042b2e41a14b67570a993ef909621954

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: "/submit.php"

  • Value: !"Referer|3a|"

  • Value: "www-form-urlencoded|0d 0a|"

  • Value: !"Accept"

  • Value: "User-Agent|3a|"

Within:

PCRE: "/[\x80-\xff]/P"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

source