""ET INFO Observed DNS over HTTPS Domain (dns1 .dnscrypt .ca in TLS SNI)""
SID: 2053602
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: "dns1.dnscrypt.ca"
Within: 1
PCRE: "/^(?:\x00\x10|.\x2e)dns1.dnscrypt.ca/R"
Special Options: