""ET TROJAN Win32/GandCrab Ransomware CnC Activity""

SID: 2025254

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_01_26, deployment Perimeter, malware_family GandCrab, signature_severity Major, tag Ransomware, updated_at 2018_01_26, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • aedf80c426fb649bb258e430a3830d85

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: ".php?token="

  • Value: "data=" Depth: 5

  • Value: !"Referer|3a|"

  • Value: !"Accept"

  • Value: !"Cookie"

Within:

PCRE: "/Content-Length\x3a\x20[0-9]{3,}\x0d\x0a/H"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_header

  • http_header

source