I am working on using some nested and/or statements in my winlogbeat to filter out some noisy logs and I am running into an issue where things are not being dropped as expected. I am curious what I have wrong in this section of the configuration where event id 22 is not being dropped.
Looking at a blog here Winlogbeat and pipelines and painless scripts, oh my! – Rambling Cookie Monster he is using equals.event_id: for the filtering and in this one Ship Windows event logs with Winlogbeat he is using equals.winlog.event_id: to filter out specific event Ids and/or events.
As an example here is one for sysmon where I want to drop all event id 22 events and event id 1 with specific processes.
Am I using the wrong form of event id or is my yml or logic off? How I know this is not working is I still see event 22 in elasticsearch.
- name: Microsoft-Windows-Sysmon/Operational
ignore_older: 72h
processors:
- drop_event.when:
or:
- equals.event_id: '22'
- and:
- equals.event_id: '1'
- or:
- equals.process.commandline: 'C:\WINDOWS\system32\svchost.exe -k appmodel -p -s camsvc'
- equals.process.commandline: 'C:\WINDOWS\system32\svchost.exe -k LocalServiceAndNoImpersonation -s SCardSvr'
- equals.process.commandline: 'C:\WINDOWS\System32\svchost.exe -k secsvcs'
- equals.process.commandline: 'C:\WINDOWS\system32\svchost.exe -k GPSvcGroup'
- equals.process.commandline: 'C:\WINDOWS\System32\svchost.exe -k wsappx -p -s ClipSVC'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc'
- equals.process.commandline: 'C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s NgcSvc'
- equals.process.commandline: 'C:\Windows\system32\svchost.exe -k localService -s RemoteRegistry'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k netsvcs -s BITS'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k netsvcs -p -s NetSetupSvc'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k netsvcs -p -s wisvc'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k netsvcs -p -s dmwappushservice'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s SmsRouter'
- equals.process.commandline: 'C:\windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts'
- equals.process.executable: 'C:\Windows\CCM\UpdateTrustedSites.exe'