""ET USER_AGENTS Observed Suspicious UA (\xa4)""
SID: 2029554
Revision: 2
Class Type: bad-unknown
Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2020_03_02, deployment Perimeter, signature_severity Minor, updated_at 2020_03_02
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
- Value: "|0d 0a|User-Agent|3a 20 a4 0d 0a|"
Within:
PCRE:
Special Options:
-
fast_pattern
-
http_header