""ET INFO Observed DNS over HTTPS Domain (dns .ndo .dev)""
SID: 2047830
Revision: 1
Class Type: misc-activity
Metadata: attack_target Client_Endpoint, created_at 2023_08_30, deployment Perimeter, signature_severity Informational, tag DoH, updated_at 2023_08_30, reviewed_at 2023_08_30
Reference:
Protocol: udp
Source Network: $HOME_NET
Source Port: any
Destination Network: any
Destination Port: 53
Flow:
Contents:
-
Value: "|01|" Depth: 1 Offset: 2
-
Value: "|00 01 00 00 00 00 00|"
-
Value: "|03|dns|03|ndo|03|dev|00|"
Within: 13
PCRE:
Special Options:
-
fast_pattern
-
nocase