""ET INFO External IP Lookup Domain in DNS Query (checkip .dyndns .org)""
SID: 2043238
Revision: 1
Class Type: bad-unknown
Metadata: attack_target Client_Endpoint, created_at 2023_01_09, deployment Perimeter, performance_impact Low, signature_severity Informational, updated_at 2023_01_09
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|checkip|06|dyndns|03|org|00|"
Within: 20
PCRE:
Special Options:
-
nocase
-
fast_pattern