""ET POLICY IP Check Domain (icanhazip. com in HTTP Host)""
SID: 2017398
Revision: 3
Class Type: attempted-recon
Metadata: created_at 2013_08_30, updated_at 2018_07_31
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
- Value: "icanhazip.com"
Within:
PCRE: "/^Host\x3a\s*?(?:[^\r\n]+?.)?icanhazip.com(?:\x3a\d{1,5})?\r$/Hmi"
Special Options:
- http_header