MEMZ Trojan: What is it and how it affects Windows PC?

Madalina Dinita
by Madalina Dinita
Managing Editor
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remove MEMZ Trojan

MEMZ is a Trojan that has received much attention from Windows PC users lately, who are intrigued by the vortex images it creates on their computers. To this day, MEMZ still remains an obscure virus for many Windows users, and the chance of getting more information from Microsoft is zero now.

The tech giant has locked the original thread about this virus. The only thread active on Microsoft Community is this. It seems like it all began like a joke, but many users got affected by it.

Leurak, the creator of the virus, intended it only to be for fun, and it was for Youtuber danooct1’s ‘Viewer-made malware’ series. He privately sent it out to some others, and some of the reciepients failed to follow Leurak’s request NOT to share it to their peers or strangers.

MEMZ was originally created by Leurak for YouTuber danooct1’s Viewer-Made Malware series. Now it’s available to the public and you can find on GitHub several versions of the virus, some Clean and others Destructive.

What is the MEMZ virus?

MEMZ is a custom-made Trojan that uses highly-complex and unique payloads which activate in a row. The first few payloads are harmless, but the final payload can make your PC completely unusable.

Once a computer is infected, the virus displays a message informing users they won’t be able to use their machines if they restart them. So remember to never restart a PC with MEMZ on it.

If you’re wondering about the way this trojan manifests itself, some of the effects include automatic web search queries in the browser, the mouse cursor changing form and random clicking, random apps being opened or closed, and many other weird errors and glitches concluding with a screen tunnel from countless screenshots that will take over your display. 

MEMZ Trojan can do an interesting and also very distructive thing: overwrite the first 64 KB of the hard disk. That means that your Master Boot Record will be affected and you’ll need some advanced troubleshooting.

Your machine won’t be able to run the OS, and will display this message instead: “Your computer has been trashed by the MEMZ Trojan. Now enjoy the Nyan cat…”  After that, the Nyan Cat will take over your computer. MEMZ’ trademark is the Nyan Cat animation acting as a bootloader.

If you decide to get rid of MEMZ via the Task Manager, your computer will crash on the spot. The final payload is initiated when restarting the computer.

There are two versions of MEMZ: one harmless version, which people use for fun, and a malware version which affects the Master Boot Record. The second one is dangerous and can make a PC unusable.

How to remove the MEMZ virus

  • Type the command taskkill /f /im MEMZ.exe in Command Prompt. This kills all the MEMZ processes without crashing the system. The downside is that the Nyan Cat will still appear after your restart your computer.
  • Install Windows using the ISO file.

If you’re curios to see how MEMZ affects your computer, you can watch the video below.

If you ever encountered MEMZ virus on a PC, tell us how you dealt with it in the comments section below. Also, if you are aware of other ways to remove the trojan, feel free to mention them.

Editor’s Note: This post was originally published in August 2016 and has been since completely revamped and updated for freshness, accuracy, and comprehensiveness

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