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Failed Console Login (Red Hat Enterprise Linux Server 5)

Microsoft.ACS.Linux.RHEL.5.Console.Login.Failed (Rule)

Rule to collect events for failed console login

Knowledge Base article:

Summary

An unsuccessful console login operation has been detected in the system log files.

Causes

User was not granted access to the system via the system console. This monitor allows system administrators to track system console 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.Linux.RHEL.5.ACSEndPoint
CategoryEventCollection
EnabledTrue
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.Linux.RHEL.5.Console.Login.Failed" Enabled="true" Target="Microsoft.ACS.Linux.RHEL.5.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] Redhat5 ConsoleLogin False -->

      <!--

            [INPUT] Oct 20 17:05:30 scxint-rhe50-01 login: FAILED LOGIN 1 FROM (null) FOR tst1, User not known to the underlying authentication module

            -->

      <!-- [EXPECTED] date="Oct 20 17:05:30"; hostname="scxint-rhe50-01"; process="login"; user="tst1" -->

      <RegExpFilter>\s+login: FAILED LOGIN [[:digit:]]+ FROM \(null\) FOR \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'login): FAILED LOGIN \d+ FROM \(null\) FOR (?'user'\S+),</RegExp>

      <EventType>0</EventType>

      <EventId>27003</EventId>

    </WriteAction>

  </WriteActions>

</Rule>