""ET TROJAN Unattributed CnC Domain in DNS Lookup (encrypted-message .cloud)""
SID: 2027231
Revision: 2
Class Type: trojan-activity
Metadata: created_at 2019_04_18, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_04_18
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: "|11|encrypted-message|05|cloud|00|"
Within: 7
PCRE:
Special Options:
-
nocase
-
fast_pattern