Rule to collect events for invalid call to sudo
An invalid 'sudo' command has been detected in the system log files.
User attempted to be granted access to privileged accounts. This monitor allows system administrators to track 'sudo' usage.
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.
Target | Microsoft.ACS.Linux.RHEL.5.ACSEndPoint |
Category | EventCollection |
Enabled | True |
Alert Generate | False |
Remotable | True |
ID | Module Type | TypeId | RunAs |
---|---|---|---|
EventDS | DataSource | Microsoft.Unix.SCXLog.Privileged.Datasource | Default |
WA | WriteAction | Microsoft.ACS.Unix.SecureEventLogWriter | Default |
<Rule ID="Microsoft.ACS.Linux.RHEL.5.Sudo.Invalid" 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 SUDO False -->
<!-- [INPUT] Oct 8 21:00:02 scxom64-rhel52-03 sudo: a-mitmor : user NOT in sudoers ; TTY=pts/2 ; PWD=/home/a-mitmor ; USER=root ; COMMAND=/bin/cat /etc/sudoers -->
<!-- [EXPECTED] date="Oct 8 21:00:02"; hostname="scxom64-rhel52-03"; process="sudo"; user="a-mitmor"; clientUser="root"; sessionName="/bin/cat /etc/sudoers" -->
<RegExpFilter>\s+sudo: \s*\S+ : user NOT in sudoers ; TTY=.* ; USER=\S+ ; COMMAND=.*</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'sudo): \s*(?'user'\S+) : user NOT in sudoers ; TTY=.* ; USER=(?'clientUser'\S+) ; COMMAND=(?'sessionName'.*)</RegExp>
<EventType>0</EventType>
<EventId>27003</EventId>
</WriteAction>
</WriteActions>
</Rule>