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SSH Success Alert Rule

Microsoft.AIX.7.LogFile.Syslog.SSHAuth.Root.Success.Alert (Rule)

Alert rule for successful SSH as root messages.

Knowledge Base article:

Summary

An SSH authentication as root was detected in the system log files.

Configuration

This rule is disabled by default. To enable this rule for monitoring, use overrides to configure the log file path and enable the rule. The log file path is set with the overridable property named LogFile, and the value must be set to the full path to the log file that will receive these events, as defined in the syslog configuration. Overrides can be used to change the parameter values for all instances or for specific instances or groups.

Causes

Users may have been granted access to privileged accounts. This monitor allows system administrators to track direct logins as root user.

Resolutions

The description of the alert and/or the output data item contains information on the event encountered. If this event appears suspicious, please check the associated event details and any other events that happened around the time of this event.

Element properties:

TargetMicrosoft.AIX.7.Computer
CategoryEventCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityInformation
Alert PriorityNormal
RemotableTrue
Alert Message
Successful SSH as Root detected
{0}

Member Modules:

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

Source Code:

<Rule ID="Microsoft.AIX.7.LogFile.Syslog.SSHAuth.Root.Success.Alert" Target="Microsoft.AIX.7.Computer" Enabled="true" Remotable="true">

  <Category>EventCollection</Category>

  <DataSources>

    <!-- [TYPE] AIX7 SSH True -->

    <!-- [INPUT] Jun  2 14:24:01 scxomd-aix7-01 auth|security:info sshd[6357222]: Accepted password for root from 10.195.175.198 port 58237 ssh2 -->

    <!-- [INPUT] Jun  2 14:24:01 scxomd-aix7-01 auth|security:info sshd[6357222]: Accepted hostbased for root from 10.195.175.198 port 58237 ssh2 -->

    <!-- [INPUT-MISS] Jun  2 14:24:01 scxomd-aix7-01 auth|security:info sshd[6357222]: Accepted password for jeffcof from 10.195.175.198 port 58237 ssh2 -->

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

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

      <LogFile>/var/adm/ras/syslog.caa</LogFile>

      <RegExpFilter>sshd\[[[:digit:]]+\]: Accepted [^[:space:]]+ for root from [^[:space:]]+</RegExpFilter>

      <IndividualAlerts>false</IndividualAlerts>

    </DataSource>

  </DataSources>

  <WriteActions>

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

      <Priority>1</Priority>

      <Severity>0</Severity>

      <AlertMessageId>$MPElement[Name="Microsoft.AIX.7.LogFile.Syslog.SSHAuth.Root.Success.AlertMessage"]$</AlertMessageId>

      <AlertParameters>

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

      </AlertParameters>

      <Suppression>

        <SuppressionValue/>

      </Suppression>

    </WriteAction>

  </WriteActions>

</Rule>