""ET TROJAN DNSG - Data Exfiltration via DNS""
SID: 2028631
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_and_Server, created_at 2019_09_19, deployment Perimeter, deployment Internal, performance_impact Low, signature_severity Major, tag DNS_tunneling, updated_at 2019_09_19
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: "|00 00 13 00 01|"
Within: 5
PCRE: "/^.[\x14-\x50][A-Za-z0-9-_.]{20,80}\x04[a-z]{2}\d{2}\x03com/R"
Special Options: