""ET TROJAN Suspicious User-Agent (WindowsNT) With No Separating Space""

SID: 2013721

Revision: 4

Class Type: trojan-activity

Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2011_10_01, deployment Perimeter, signature_severity Major, tag User_Agent, updated_at 2017_01_13

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "WindowsNT"

  • Value: !".rview.com|0d 0a|"

  • Value: !".mobizen.com|0d 0a|"

Within:

PCRE: "/User-Agent\x3A[^\r\n]*WindowsNT/H"

Special Options:

  • http_header

  • http_header

  • http_header

source