""ET USER_AGENTS suspicious user agent string (CholTBAgent)""

SID: 2012757

Revision: 4

Class Type: trojan-activity

Metadata: created_at 2011_04_30, updated_at 2011_05_25

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "User-Agent|3a 20|CholTBAgent"

Within:

PCRE:

Special Options:

  • http_header

source