""ET TROJAN DNS Query to Malicious Domain (nsvc .mail .server .korea)""
SID: 2051048
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2024_02_22, deployment Perimeter, signature_severity Major, updated_at 2024_02_22
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: "|04|nsvc|04|mail|06|server|05|korea|00|"
Within: 24
PCRE:
Special Options:
-
fast_pattern
-
nocase