2018-031-Derbycon ticket CTF, Windows Event forwarding, SIEM collection, and missing events... oh my!

We are back with a new episode this week! We got over our solutions for some of the #derbyCon ticket #CTF challenges and include links to some of the challenges. We talk about Windows Event Forwarder, and all log forwarders seem to losing events!

 

Thanks to our Patrons!

Gonna be at Derbycon, come see us!

 

Congrats to our Derbycon Ticket CTF winners!

Winner:  @gigstaggart

2nd Place: @ohai_ninja

3rd Place: @SoDakHib

 

Mr. Boettcher’s Challenge (SuperCrypto): https://drive.google.com/open?id=1657hBxRbacJRw0svG1nwzZImON3QFn1t

 

Ms.Berlin’s Challenge:

 

potato.file https://drive.google.com/open?id=1Mit7060ipK_JgDDF7sYG3XbMpZ9wyaFN

Taters.zip https://drive.google.com/open?id=1TnA16EiwLw2BberHXct8JpEsntT-GWq7

Potatoes.pcapng: https://drive.google.com/open?id=1_IATBw4OGAc7lUc7NXTcucfwU9NAROYN

 

Mr. Brake’s Challenge: https://drive.google.com/open?id=1gwGkLjWEZ42NlWiw2Eg8IQnnQAxua7B8

 

Update on Mental Health GoFundMe: http://www.derbycon.com/wellness

Thanks to the #Derbycon organizers for their time and patience on answering the questions posed.

 

Missing event issues:

https://social.technet.microsoft.com/Forums/en-US/eddf3f41-db8d-4729-a838-646cbbb45295/missing-events-on-event-subscription?forum=winservergen

https://social.technet.microsoft.com/Forums/en-US/cb34f0d3-22df-498c-a782-d1957f6852ac/forwarded-events-subscriptions-missing-information-in-eventdata-section?forum=winserverManagement

 

https://github.com/palantir/windows-event-forwarding

 

https://answers.splunk.com/answers/337939/how-to-troubleshoot-why-im-missing-events-in-my-se.html

https://docs.microsoft.com/en-us/windows/security/threat-protection/use-windows-event-forwarding-to-assist-in-intrusion-detection

https://www.solarwinds.com/free-tools/event-log-forwarder-for-windows

 

https://blogs.technet.microsoft.com/jepayne/2015/11/23/monitoring-what-matters-windows-event-forwarding-for-everyone-even-if-you-already-have-a-siem/

 

https://hackernoon.com/the-windows-event-forwarding-survival-guide-2010db7a68c4

 

https://4sysops.com/archives/windows-event-forwarding-to-a-sql-database/

 

https://blogs.technet.microsoft.com/jepayne/2017/12/08/weffles/

 

http://bpatty.rocks/blue_team/weffles.html

 

https://blogs.technet.microsoft.com/nathangau/2017/05/05/event-forwarding-and-how-to-configure-it-for-the-security-monitoring-management-pack/

 

Some issues with missing events… Everyone is affected by this!

 

WEF & PowerBI is good for small installations.

 

Any GPOs involved?

Can it be done on a server by server basis?

Can an attacker simply disable the service once initial access is achieved?

 

Pros and Cons of feeding the WEF output to a MapReduce system?

 

Not sure if they've used it, but WEF vs. winlogbeat vs. NxLog?

 

Need a config?  Get some examples here for nxlog, winlogbeat, filebeat, Windows Logging Service and other stuff...

https://www.malwarearchaeology.com/logging/

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