""ET TROJAN Ransomware Locky CnC Beacon""

SID: 2022538

Revision: 4

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_02_17, deployment Perimeter, signature_severity Major, tag c2, updated_at 2016_03_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • b06d9dd17c69ed2ae75d9e40b2631b42

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: "/main.php"

  • Value: !"Referer|3a|"

  • Value: !"Accept"

  • Value: "Content-Length|3a 20|10"

  • Value: "|0d 0a|"

  • Value: "Connection|3a 20|Keep-Alive|0d 0a|"

Within: 2

PCRE: "/^.{0,15}[^\x20-\x7e\r\n]/Ps"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

  • http_header

  • http_header

source