Rule to collect events for deleting a user
A successful userdel command has been detected in the system log files.
A user was removed from the system. This monitor allows system administrators to track account/group creation and deletion.
The description of the alert and/or the output data item contains information on the event encountered. If the activity appears suspicious, please check the associated event details and any other events that happened around the time of this event.
Target | Microsoft.ACS.Linux.RHEL.7.ACSEndPoint |
Category | EventCollection |
Enabled | True |
Alert Generate | False |
Remotable | True |
ID | Module Type | TypeId | RunAs |
---|---|---|---|
EventDS | DataSource | Microsoft.Unix.SCXLog.Privileged.Datasource | Default |
WA | WriteAction | Microsoft.ACS.Unix.SecureEventLogWriter | Default |
<Rule ID="Microsoft.ACS.Linux.RHEL.7.Deleting.User" Enabled="true" Target="Microsoft.ACS.Linux.RHEL.7.ACSEndPoint" Remotable="true">
<Category>EventCollection</Category>
<DataSources>
<DataSource ID="EventDS" TypeID="Unix!Microsoft.Unix.SCXLog.Privileged.Datasource">
<Host>$Target/Host/Property[Type="Unix!Microsoft.Unix.Computer"]/NetworkName$</Host>
<LogFile>/var/log/secure</LogFile>
<!-- [TYPE] Redhat7 UserDelete True -->
<!-- [INPUT] Sep 14 21:03:16 ostcdev64-rhel7-10 userdel[51139]: delete user 'testuser2' -->
<!-- [EXPECTED] date="Sep 14 21:03:16"; hostname="ostcdev64-rhel7-10"; process="userdel"; processId="51139"; clientUser="testuser2" -->
<RegExpFilter>\s+userdel\[[[:digit:]]+\]: delete user '\S+'</RegExpFilter>
</DataSource>
</DataSources>
<WriteActions>
<WriteAction ID="WA" TypeID="ACS.Unix!Microsoft.ACS.Unix.SecureEventLogWriter">
<RegExp>(?'date'\S+\s+\d+\s+\d+:\d+:\d+)\s+(?:\S+:)?(?'hostname'\S+)\s+(?'process'userdel)\[(?'processId'\d+)\]: delete user '(?'clientUser'\S+)'</RegExp>
<EventType>1</EventType>
<EventId>27005</EventId>
<BackrefOverrides>sessionName="User removed"</BackrefOverrides>
</WriteAction>
</WriteActions>
</Rule>