""ET TROJAN SOMNIRECORD Backdoor DATA Command in DNS Query""
SID: 2044746
Revision: 4
Class Type: trojan-activity
Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_22, deployment Perimeter, malware_family SOMNIRECORD, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_08_22, reviewed_at 2023_08_21
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: "-DATA-"
Within: 7
PCRE: "/[a-z0-9]{3}-DATA-[a-f0-9]{6}/i"
Special Options:
-
nocase
-
fast_pattern