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SSH Authentication Failure alert rule

Microsoft.Linux.SLES.9.LogFile.Syslog.SSHAuth.PAM.Root.Failure.Alert (Rule)

Alert rule for detection of SSH Authentication failures.

Knowledge Base article:

Summary

A SSH authentication failure for the root account has been detected in the system log files.

Causes

A failure may be caused by a mistyped password or an attempt to use an invalid user name. However, a persistent failure could be an indication that someone is attempting to gain unauthorized access.

Resolutions

The description of the alert and/or the output data item contains information on the problem encountered. If a failure occurs, please check the associated event details and any other events that happened around the time of this failure to diagnose the problem.

Element properties:

TargetMicrosoft.Linux.SLES.9.Computer
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
RemotableTrue
Alert Message
SSH Authentication Failure detected
{0}

Member Modules:

ID Module Type TypeId RunAs 
EventDS DataSource Microsoft.Unix.SCXLog.Privileged.Datasource Default
GenerateAlert WriteAction System.Health.GenerateAlert Default

Source Code:

<Rule ID="Microsoft.Linux.SLES.9.LogFile.Syslog.SSHAuth.PAM.Root.Failure.Alert" Target="Microsoft.Linux.SLES.9.Computer" Enabled="true" Remotable="true">

  <Category>EventCollection</Category>

  <DataSources>

    <DataSource ID="EventDS" TypeID="Unix!Microsoft.Unix.SCXLog.Privileged.Datasource">

      <Host>$Target/Property[Type="Unix!Microsoft.Unix.Computer"]/PrincipalName$</Host>

      <LogFile>/var/log/messages</LogFile>

      <RegExpFilter>.*sshd.*error.*PAM.*Authentication.*failure.*for.*root.*</RegExpFilter>

      <IndividualAlerts>false</IndividualAlerts>

    </DataSource>

  </DataSources>

  <WriteActions>

    <WriteAction ID="GenerateAlert" TypeID="SystemHealth!System.Health.GenerateAlert">

      <Priority>1</Priority>

      <Severity>2</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.Linux.SLES.9.LogFile.Syslog.SSHAuth.PAM.Root.Failure.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

        <AlertParameter1>$Data/EventDescription$</AlertParameter1>

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>