""ET TROJAN FIN7 JSSLoader Variant Activity (GET)""

SID: 2033889

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_09_02, deployment Perimeter, performance_impact Low, signature_severity Major, tag FIN7, updated_at 2021_09_02

Reference:

  • md5

  • bf23c48d111f5a2d3169062428940b1c

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: "/?id=" Depth: 5

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+[\r\n]+$/H"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

source