Built-in guest account privilege escalation
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About the rule
Rule Type
Advanced
Rule Description
Built-in guest account privilege escalation
Severity
Critical
Rule Requirement
Criteria
Action1:
actionname = "Successful Network Guest Logon"
Action2:
actionname = "Privileged Operation Attempt" AND LOGONID = Action1.LOGONID
Action3:
actionname = "User Account Local Group Membership Changes Attempt" AND LOGONID = Action1.LOGONID AND LOGONID = Action2.LOGONID
sequence:Action1 followedby Action2 within 60m followedby Action3 within 60m
select Action1.HOSTNAME,Action1.MESSAGE,Action1.PROCESSNAME,Action1.REMOTEHOST,Action1.REMOTEIP,Action1.USERNAME,Action1.DOMAIN,Action1.NETWORKACCOUNTDOMAIN,Action1.NETWORKACCOUNTNAME,Action1.LOGONID,Action1.LOGONTYPE,Action2.HOSTNAME,Action2.MESSAGE,Action2.DOMAIN,Action2.USERNAME,Action2.ACCESSRIGHT,Action2.LOGONID,Action3.HOSTNAME,Action3.MESSAGE,Action3.DOMAIN,Action3.GROUPDOMAIN,Action3.GROUPNAME,Action3.TARGETDOMAIN,Action3.TARGETUSER,Action3.USERNAME,Action3.LOGONID
Detection
Execution Mode
realtime
Log Sources
Windows
