Rule to collect events for invalid ssh login
An invalid ssh command has been detected in the system log files.
User was not granted access to the system remotely. This monitor allows system administrators to track 'ssh' usage.
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.SLES.11.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.SLES.11.Ssh.Invalid" Enabled="true" Target="Microsoft.ACS.Linux.SLES.11.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/messages</LogFile>
<!-- [TYPE] SUSE SSH False -->
<!-- [INPUT] Oct 7 17:14:31 sles11-cjc sshd[28386]: Invalid user xxx from 192.168.233.132 -->
<!-- [EXPECTED] date="Oct 7 17:14:31"; hostname="sles11-cjc"; process="sshd"; processId="28386"; user="xxx"; clientHost="192.168.233.132" -->
<RegExpFilter>sshd\s*\[[[:digit:]]+\]\s*:\s*Invalid\s+user\s+\S+\s+from\s+\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'sshd)\s*\[(?'processId'\d+)\]\s*:\s*Invalid\s+user\s+(?'user'\S+)\s+from\s+(?'clientHost'\S+)</RegExp>
<EventType>0</EventType>
<EventId>27003</EventId>
</WriteAction>
</WriteActions>
</Rule>