""ET INFO External IP Check Domain in DNS Lookup (whois .pconline .com .cn)""
SID: 2047621
Revision: 1
Class Type: bad-unknown
Metadata: attack_target Client_Endpoint, created_at 2023_08_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2023_08_11, reviewed_at 2024_03_11
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: "|05|whois|08|pconline|03|com|02|cn|00|"
Within: 23
PCRE:
Special Options:
-
fast_pattern
-
nocase