Rule to collect events for adding a new group
A successful groupadd command has been detected in the system log files.
A new group was created on 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.4.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.4.Adding.Group" Enabled="true" Target="Microsoft.ACS.Linux.RHEL.4.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>
<!-- [TYPE] Redhat4 GroupAdd True -->
<!-- [INPUT] Oct 15 17:34:34 scxcrd-rhe40-01 groupadd[8245]: new group: name=tempgroup, gid=511 -->
<!-- [EXPECTED] date="Oct 15 17:34:34"; hostname="scxcrd-rhe40-01"; process="groupadd"; processId="8245"; groupName="tempgroup" -->
<LogFile>/var/log/secure</LogFile>
<RegExpFilter>\s+groupadd\[[[:digit:]]+\]: new group: name=\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'groupadd)\[(?'processId'\d+)\]: new group: name=(?'groupName'\S+),</RegExp>
<EventType>1</EventType>
<EventId>27004</EventId>
<BackrefOverrides>sessionName="Group added"</BackrefOverrides>
</WriteAction>
</WriteActions>
</Rule>