""ET USER_AGENTS Suspicious User-Agent (C slash)""

SID: 2008512

Revision: 19

Class Type: trojan-activity

Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag User_Agent, updated_at 2017_10_30

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "User-Agent|3a| C|3a 5c|"

  • Value: !"|5c|Citrix|5c|"

  • Value: !"|5c|Panda S"

  • Value: !"|5c|Mapinfo"

Within:

PCRE:

Special Options:

  • http_header

  • http_header

  • nocase

  • http_header

  • http_header

  • nocase

source