""ET INFO DNS Lookup for 8+ hexadecimal only duckdns domain""
SID: 2033959
Revision: 2
Class Type: bad-unknown
Metadata: attack_target Client_Endpoint, created_at 2021_09_16, deployment Perimeter, performance_impact Moderate, signature_severity Major, updated_at 2021_09_16
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: "|07|duckdns|03|org"
Within: 7
PCRE: "/[\x08-\xff][a-f0-9]{8,}\x07duckdns\x03org/"
Special Options: