""ET USER_AGENTS EmailSiphon Suspicious User-Agent Inbound""
SID: 2013032
Revision: 2
Class Type: attempted-recon
Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2011_06_14, deployment Perimeter, signature_severity Major, tag User_Agent, updated_at 2011_06_14
Reference:
Protocol: tcp
Source Network: $EXTERNAL_NET
Source Port: any
Destination Network: $HOME_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
- Value: "User-Agent|3a| EmailSiphon"
Within:
PCRE:
Special Options:
-
nocase
-
http_header