""ET TROJAN Suspicious User-Agent - Possible Trojan Downloader (ver18/ver19 etc)""
SID: 2003380
Revision: 12
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, tag Trojan_Downloader, 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| "
-
Value: ")ver"
Within:
PCRE: "/^User-Agent\:[^\n]+)ver\d/Hmi"
Special Options:
-
http_header
-
nocase
-
http_header
-
fast_pattern