""ET INFO HTTP Request for External IP Check (ip-addr .es)""
SID: 2020105
Revision: 3
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2015_01_07, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_05_22
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
-
Value: "GET"
-
Value: "ip-addr.es|0d 0a|"
Within:
PCRE: "/^Host\x3a[^\r\n]+?ip-addr.es(?:\x3a\d{1,5})?\r?$/Hmi"
Special Options:
-
http_method
-
http_header