SID: 2046046

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_05_31, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, updated_at 2023_12_28

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: "WindowsPowerShell"

Within:

PCRE: "/^User-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\nConnection\x3a\x20[^\r\n]+\r\n\r\n$/H"

Special Options:

  • http_method

  • http_header

  • fast_pattern

source