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Invalid ssh login (Solaris 11)

Microsoft.ACS.Solaris.11.Ssh.Invalid (Rule)

Rule to collect events for invalid ssh login

Knowledge Base article:

Summary

An invalid ssh command has been detected in the system log files.

Causes

User was not granted access to the system remotely. This monitor allows system administrators to track 'ssh' usage.

Resolutions

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.

Element properties:

TargetMicrosoft.ACS.Solaris.11.ACSEndPoint
CategoryEventCollection
EnabledFalse
Alert GenerateFalse
RemotableTrue

Member Modules:

ID Module Type TypeId RunAs 
EventDS DataSource Microsoft.Unix.SCXLog.Privileged.Datasource Default
WA WriteAction Microsoft.ACS.Unix.SecureEventLogWriter Default

Source Code:

<Rule ID="Microsoft.ACS.Solaris.11.Ssh.Invalid" Enabled="false" Target="Microsoft.ACS.Solaris.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/authlog</LogFile>

      <!-- [TYPE] Solaris SSH False -->

      <!-- [INPUT] Jan 13 10:57:24 jeffcof-sol11-x86 sshd[3142]: [ID 800047 auth.info] Illegal user unknownuser from 172.30.168.208 -->

      <!-- [EXPECTED] date="Jan 13 10:57:24"; hostname="jeffcof-sol11-x86"; process="sshd"; processId="3142"; user="unknownuser"; clientHost="172.30.168.208" -->

      <RegExpFilter>[[:space:]]+sshd\[[[:digit:]]+\]: \[.*\] Illegal user ([^[:space:]]+) from [^[:space:]]+</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)\[(?'processId'\d+)\]: \[.*\] Illegal user (?'user'\S+) from (?'clientHost'\S+)</RegExp>

      <EventType>0</EventType>

      <EventId>27003</EventId>

    </WriteAction>

  </WriteActions>

</Rule>