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Successful Password Change from non-root user (SUSE Linux Enterprise Server 11)

Microsoft.ACS.Linux.SLES.11.Password.Change.From.User.Succeeded (Rule)

Rule to collect events for successful password change from non-root user

Knowledge Base article:

Summary

A successful password change operation from a user account has been detected in the system log files.

Causes

A password was successfully changed on the system. This monitor allows system administrators to track password changes.

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.SLES.11.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.SLES.11.Password.Change.From.User.Succeeded" 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 Password True -->

      <!-- [INPUT] Oct 19 09:58:36 scxcr-sles11-03 passwd[5589]: password changed - account=jeffcof, uid=1005, by=1005 -->

      <!-- [EXPECTED] date="Oct 19 09:58:36"; hostname="scxcr-sles11-03"; process="passwd"; processId="5589"; user="jeffcof"; clientUser="jeffcof" -->

      <RegExpFilter>\s+passwd\[[[:digit:]]+\]: password changed - account=\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'passwd)\[(?'processId'\d+)\]: password changed - account=(?=(?'clientUser'\S+),)(?'user'\S+), uid=\d+, by=(?!0)\d+</RegExp>

      <EventType>1</EventType>

      <EventId>27004</EventId>

      <BackrefOverrides>sessionName="Password changed"</BackrefOverrides>

    </WriteAction>

  </WriteActions>

</Rule>