""ET INFO DYNAMIC_DNS Query to a *.fxnxs .com Domain""
SID: 2041594
Revision: 2
Class Type: bad-unknown
Metadata: attack_target Client_and_Server, created_at 2022_12_02, deployment Perimeter, performance_impact Low, signature_severity Informational, updated_at 2023_03_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1568, mitre_technique_name Dynamic_Resolution
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|fxnxs|03|com|00|"
Within: 7
PCRE:
Special Options:
-
nocase
-
fast_pattern