""ET TROJAN Win/Ghostlocker Ransomware Activity M2 (POST)""

SID: 2050994

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2024_02_21, deployment Perimeter, confidence High, signature_severity Major, updated_at 2024_02_21

Reference:

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: "/add"

  • Value: "User-Agent|3a 20|python-requests/"

  • Value: "|7b 22|id|22 3a 20 22|" Depth: 8

  • Value: "|22 2c 20 22|key|22 3a 20 22 62 27|"

  • Value: "|27 22 2c 20 22|pcname|22 3a 20 22|"

  • Value: !"Referer"

Within:

PCRE: "/^Accept-Encoding\x3a\x20[^\r\n]+\x20zstd/Hm"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source