""ET TROJAN Unknown Rootkit Download Activity (GET)""

SID: 2033647

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_08_03, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2021_08_03

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: "/api/safe/" Depth: 10

  • Value: "?appid="

  • Value: "&m="

  • Value: "&nonce_str="

  • Value: "&time_stamp="

  • Value: "&sign="

  • Value: "User-Agent|3a 20|Http-connect|0d 0a|"

  • Value: !"Referer|3a 20|"

  • Value: !"Accept"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

source