""ET TROJAN TA404 Comebacker Related Activity (POST)""

SID: 2049276

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_11_21, deployment Perimeter, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2023_11_21

Reference:

  • md5

  • d8a8cc25bf5ef5b96ff7a64f663cbd29

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: "/upload.asp"

  • Value: "ASPSESSIONID"

  • Value: !"="

  • Value: !"Referer"

Within: 8

PCRE: "/^Content-Type[^\r\n]+\r\nConnection[^\r\n]+\r\n/Hm"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_cookie

  • http_cookie

  • http_header

source