Suspicious Cobalt Strike DNS Beaconing - Sysmon

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About the rule

Rule Type

Standard

Rule Description

Detects a program that invoked suspicious DNS queries known from Cobalt Strike beacons

Severity

Critical

Rule Requirement

Criteria

Action1: actionname = "sa_dns_query" AND QUERY startswith "aaa.stage.,post.1" OR QUERY contains ".stage.123456." select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.QUERY,Action1.STATUSCODE,Action1.RESULT

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Florian Roth (Nextron Systems)