""ET TROJAN PS/PSRansom Client Checkin (GET)""

SID: 2042887

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_14, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2022_12_14

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/done"

  • Value: "WindowsPowerShell/"

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

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+WindowsPowerShell\//Hmi"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

source