CNC Callback and Suspicious Connection Log Message (Part-1)

Vendor Documentation

https://docs.trendmicro.com/en-us/enterprise/apex-central-online-help/appendices/syslog-mapping-cef.aspx

https://docs.trendmicro.com/en-us/enterprise/apex-central-online-help/appendices/syslog-mapping-cef/cef-ade-logs.aspx

Log Fields and Parsing

This section details the log fields available in this log message type, along with values parsed for both LogRhythm Default and LogRhythm Default v2.0 policies. A value of "N/A" (not applicable) means that there is no value parsed for a specified log field.

Log Field	LogRhythm Default	LogRhythm Default v2.0
N/A	<severity>	<severity>
Header (logVer)	N/A	N/A
Header (vendor)	N/A	N/A
Header (pname)	N/A	N/A
Header (pver)	<version>	N/A
Header (eventid)	<vendorinfo>	N/A
Header (eventName)	<threatname>	<vmid>
Header (severity)	<severity>	N/A
deviceExternalId	N/A	N/A
rt	N/A	N/A
cat	<processid>	N/A
deviceFacility	N/A	N/A
cs2Label	<threatname>	N/A
cs2	<cve>	N/A
shost	<sname>	N/A
src	<sip>	<sip>
spt	<sport>	N/A
c6a2Label	N/A	N/A
c6a2	N/A	<sip>
cs3Label	N/A	N/A
cs3	N/A	<domainorigin>
cs4Label	N/A	N/A
cs4	N/A	<policy>
act	<action>	<action> <tag1>
cn1Label	<policy>	N/A
cn1	N/A	<severity>
cn2Label	N/A	N/A
cn2	N/A	N/A
cn3Label	N/A	N/A
cn3	N/A	N/A
request	N/A	<url>
deviceCustomDate1Label	N/A	N/A
deviceCustomDate1	N/A	N/A
deviceCustomDate2Label	N/A	N/A
deviceCustomDate2	N/A	N/A
cs5Label	N/A	N/A
cs5	N/A	N/A
dst	<dip>	<dip>
dpt	<dport>	N/A
c6a3Label	N/A	N/A
c6a3	N/A	<dip>
deviceProcessName	N/A	<process>
deviceNtDomain	<domainorigin>	N/A
dntdom	N/A	N/A
dvchost	<dname>	N/A
TMCMLogDetectedHost	N/A	<dname>
TMCMLogDetectedIP	N/A	<dip>
ApexCentralHost	N/A	N/A
devicePayloadId	N/A	N/A
reason	<reason>	N/A

Log Processing Settings

This section details log processing changes made from the LogRhythm Default policy to LogRhythm Default v2.0. In some cases, base rules are broken down into sub rules to appropriately parse log message types by their event types.

LogRhythm Default

Regex ID	Rule Name	Rule Type	Classification	Common Event
1011519	CNC Callback and Suspicious Connection Log Message	Base Rule	Suspicious	Suspicious Activity

LogRhythm Default v2.0

Regex ID	Rule Name	Rule Type	Classification	Common Event
1012135	V 2.0 : C&C Callback Event	Base Rule	Activity	General Threat Message
	V 2.0 : C&C Callback : Unknown	Sub Rule	Activity	General Threat Message
	V 2.0 : C&C Callback : Pass	Sub Rule	Malware	Detected Malware Activity
	V 2.0 : C&C Callback : Block	Sub Rule	Failed Activity	Threat Blocked
	V 2.0 : C&C Callback : Monitor	Sub Rule	Malware	Detected Malware Activity
	V 2.0 : C&C Callback : Delete	Sub Rule	Failed Activity	Threat Deleted
	V 2.0 : C&C Callback : Quarantine	Sub Rule	Activity	Quarantine
	V 2.0 : C&C Callback : Warn	Sub Rule	Malware	Detected Malware Activity
	V 2.0 : C&C Callback : Warn & Continue	Sub Rule	Malware	Detected Malware Activity
	V 2.0 : C&C Callback : Override	Sub Rule	Malware	Detected Malware Activity