""ET INFO Observed DNS over HTTPS Domain (dns .hyas .com in TLS SNI)""
SID: 2053647
Revision: 1
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2024_06_13, deployment Perimeter, signature_severity Informational, tag DoH, updated_at 2024_06_13
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: 443
Flow: established,to_server
Contents:
-
Value: "|16|"
-
Value: "|01|"
-
Value: "|00 00|"
-
Value: "|00|"
-
Value: "dns.hyas.com"
Within: 1
PCRE: "/^(?:\x00\x0c|.\x2e)dns.hyas.com/R"
Special Options: