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Stephan Berger Profile picture
@malmoeb
Apr 17 • 4 tweets • 2 min read Twitter logo Read on Twitter
1/ I used #AutoRuns v14.09 (GUI) in my lab setup but noticed that it failed to find (or display) the malware in the Startup folder, although the file is there (screenshot below).

I checked back and forth, searched manually for the file, and restarted the OS and AutoRuns.

🧵 Image
2/ With #Velociraptor, I ran the hunt Sysinternals.Autoruns, and with the CLI version of AutoRuns, the malware is found in the Startup folder. Image
3/ The same for the #Velociraptor hunt Sys.StartupItems. Image
4/ Am I making a silly mistake, or is this version of AutoRuns buggy? (I haven't tested an older version yet). The version I am using is the latest one available for download from the MS website).

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More from @malmoeb

Stephan Berger Profile picture
Apr 18
1/ Customer receives an email from a network monitoring device that a host is supposedly infected with a #CoinMiner. The Task Manager on the said system shows the following screenshot 🤕.

A story of an unpatched system, incorrect scoping, and 🍀. 🧵

#CyberSecurity Image
2/ The affected (and remotely accessible) server have had Confluence installed.

One of my first questions I asked the customer was if the system was up to date (Spoiler: it wasn't).

Confluence 6.0.4 was installed at the time of the incident.
3/ Confluence 6.0.4 was released in January 2017 🤯 Image
Read 14 tweets
Stephan Berger Profile picture
Mar 21
1/ The content below is from a file named install.bat and stems from a recent investigation where a TA launched this batch file. 👀

What's going on?

Well, VboxUpdate.exe is, in fact, tor.exe, and a new service is created, launching tor with a config file.

🧵 #CyberSecurity Image
2/ Below is an excerpt from the content of config.txt; the configuration file passed as an argument to the tor service.

If you think this looks a lot like RDP Tunneling, you are absolutely right. 🥇 Image
3/ Head over to the allthingsdfir blog to read a more profound write-up about the techniques used here and how they work together.

allthingsdfir.com/rdp-over-tor/
Read 5 tweets
Stephan Berger Profile picture
Mar 20
1/ Real-World #PingCastle Finding #13: Allow log on locally

➡️ Domain Users are eligible to log into DC's 🤯🙈

"When you grant an account the Allow logon locally right, you are allowing that account to log on locally to all domain controllers in the domain." [1]

#CyberSecurity Image
2/ Why is this a bad idea?

"If you do not restrict this user right to legitimate users who must log on to the console of the computer, unauthorized users could download and run malicious software to elevate their privileges." [1]
3/ I encountered this finding several times in our AD assessments, so you better check your settings in your domain right now (better safe than sorry 🔒).

Good luck 🍀
Read 4 tweets
Stephan Berger Profile picture
Mar 18
1/ Do you monitor newly created services within your environment, and would you notice when a (vulnerable) driver is loaded?

The screenshot below (#Velociraptor 🤩) is from a recent #XMRig CoinMiner investigation ⤵️

🧵 #CyberSecurity
2/ We talked about vulnerable drivers before:

3/ And here:

Read 4 tweets
Stephan Berger Profile picture
Mar 17
1/ #Velociraptor has covered hunting for malicious WMI Event Consumers for some time. [1]

However, Velociraptor does not provide an eradication hunt for malicious WMI Event Consumers out of the box.

🧵 #CyberSecurity
2/ @threatpunter wrote a detailed blog about WMI persistences and how to remove them.

"The simplest method to remove the entry from the WMI database is to use Autoruns. Launch Autoruns as an administrator and select the WMI tab to review WMI-related persistence." ✂️ Image
3/ "Alternatively, you can remove the WMI event subscriptions from the command line." [2] Image
Read 4 tweets
Stephan Berger Profile picture
Mar 15
1/ Number #10 of the #ActiveDirectory hardening measures:

Easy Wins (for Attackers)

🧵 #CyberSecurity
This is the last thread in this AD hardening measure series, but there would still be so much to discuss 😅

Here are more points you should focus on to defend your networks even better.
"Administrative accounts should never be enabled for delegation.

You can prevent these privileged accounts from being targeted by enabling the ‘Account is sensitive and cannot be delegated’ flag on them. You can optionally add these accounts to the ‘Protected Users’ group.
Read 11 tweets

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