""ET TROJAN LeChiffre Ransomware CnC""

SID: 2022406

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2016_01_25, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2016_01_25, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/sipvoice.php?" Depth: 14

  • Value: "&session="

  • Value: "Keep-Alive|3a 20|300"

  • Value: !"Accept"

  • Value: !"Referer|3a|"

  • Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|Synapse)"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

  • http_header

  • http_header

  • http_header

source