""ET TROJAN FrameworkPOS Covert DNS CnC Beacon 1""
SID: 2019454
Revision: 2
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2014_10_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_08_28, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
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: "dc"
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Value: "|06|beacon"
Offset: 12
Within: 7
PCRE: "/^\x0e-\x1e{1,3}(?:dc(?:[a-f0-9]{2}){1,3}){3}.[a-f0-9]{2}/Ri"
Special Options:
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nocase
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nocase
-
fast_pattern