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Not Now

Reports of two massive, global ransomware attacks are dominating the news. As workers in Europe are heading home for the weekend, ransomware is shutting down their systems. We can tell you that both Malwarebytes consumers and business users are protected. Here’s what we know about the WanaCryt0r ransomware attack so far.

Reports of two massive ransomware attacks by a ransomware that Malwarebytes detects as Ransom.WanaCrypt0r. attacks in Europe are dominating the news.

A single layer of protection is not enough, make sure you have layered cybersecurity defenses.

304 Reviews
Tell people what you think
Elizabeth Book Kratz
· May 13, 2017
I am very happy with the premium service for my home PC and previously was thrilled with the free version. I'm told this is likely one of the only products out there that protects against ransomware as well as run-of-the-mill malware. Keep up the great work and thank you.
Sam Bailey
· May 15, 2017
I've used Malware-bytes from time to time over the years, and here's always what happens: I run it a few times, find some malware to quarantine and delete, and ...then Malware-bytes begins acting strangely. It hogs system resources, slows everything on my computer to a crawl, then will not allow me to turn it off. In the end, it always screws up my computer so badly that the only way to deal with the situation is to uninstall it. I'm not sure why a program that's supposed to protect against malware often acts like malware. The only reason I considered using it again is because of the recent spread of ransomware. But if the anti-malware program renders my computer virtually unusable, what good is that? Oh, and this has nothing to do with my computer specs: It's always done this on any computer I've ever installed it on, including on this brand new computer that is up to date and has lots of RAM. I just had to spend a third of my day trying to get this crap off my computer so it would function again. Don't use this program. It's very, very bad. See More
Diane Mulhearn
· May 19, 2017
It's great when it's running right. It seems to have a glitch that many people have discovered, all of a sudden you'll get a message saying You're web protecti...on is off, so you go and put it on, and it keeps trying to load forever and never does a thing. This is now the second time this happened to me, and it happened on my husband's computer as well. The only way we found to fix it, is to completely uninstall and then reinstall the program which is a pain! We've had this program for years and now have the premium version, latest updates, etc. Same thing happened again today and we took the program off and reinstalled it and now it's saying my updates are not current, but it won't update. I'll keep trying, but really, I wish Malwarebytes would fix this glitch that I know they're very aware of. I like the program, but if this keeps up, I'll try to find another program to use next year when I would have to pay for it again. One that is more glitch free. See More
Scott Galbraith
· May 14, 2017
My PC was running very raggedly lately, very laggy. I thought it was just because of WIN 10 on an old PC. On a whim I downloaded the trial version and scanned. ...It got rid of a lot of junk, close to 100 cootie infested things my antivirus let slip by and my PC's performance has improved quite a lot. Upgraded to premium just now. See More
Arthur J. Morales
· May 12, 2017
I've had Malwarebytes on all my computers for years. The Adwcleaner software that is now part of their products is a great tool for removing malware that's on a...n infected computer that has only antivirus. It does not shut itself off, does not get hijacked, and the premium version protects real-time against ransomware too. It's a superior product. See More
William Filber
· May 13, 2017
Sometimes when there is an issue with any program, software or specifically a security program. It is a conflict with your manufacture's installed program, I h...ave had this software for years and it runs and operates on a old computer. A computer that is running on Windows 10 which eats up tons of rams, but it does work and it works great. No problem here, best of luck and God Bless. See More
Dave Yealy
· May 22, 2017
For the past 30+ hours malwarebytes has been doing a scan on my 250G hard drive that is 3/4 full and it only found 23 Potentially unwanted programs. There has to be something out there faster and better than a 30+ hour scan.
Tim Pate
· May 19, 2017
I posted details on their page, but basically, the product won't turn on its web protection. These sorts of issues have plagued Version 3 of the product so much... so that I am considering moving to something else. Which is a shame because I purchased several licences for family and friends and now I am starting to feel like a bit of a fool. See More
Paul Whelan
· May 13, 2017
Thank goodness for Malwarebytes, and especially after this recent ransomware attack. So glad I have the premium version. They even let me know about it before I was aware of the attack, and that I was protected too!
It has on several occasions blocked malicious websites.
Love it!!
James Whittington
· May 25, 2017
I have Malwarebytes premium paid up through October but it got cut off for some reason and I cannot get Malwarebytes to do anything about it!!!
Richard Utterklo
· May 19, 2017
Ok so i tested your program, what i can say about the 14 test days is that even with auto update on the program does not update, you have to do it manually. And... everyday when I start my pc the webprotection just says its off and you have to manually turn the protection on again!? other then that I think it does what it does. WTF IS THIS BULLSHIT .. :( See More
Arjun Adeshra
· May 17, 2017
Trustworthy and a Great company . Keep it up. 5 🌟. The best in the malware business. Install it and be rest assured that your data is safe with the PC.
Fran Parker
· May 12, 2017
Malwarebytes is the one required piece of software for myself and my clients. I can not live without it!
I trust Malwarebytes Antimalware to work safely alongs...ide ESET Smart Security (my personal favorite pay to play) or Windows Defender (alternate favorite free) on Windows, or with ESET Cybersecurity Pro on the Mac.
Thank you Malwarebytes!
See More
Steve Rabson
· May 20, 2017
Seems to do the trick. Just the tiniest slow down of my laptop at scan time, but TBH I'm prepared to put up with that, knowing that my machine is unlikely to become a Maleware cropper.
Kathy Christiansen
· May 24, 2017
I purchased Malwarebytes Because it is very good. PPut when it updated to the new version it made my computer very slow and now my browser (Firefox) freezes alot.
Cosima Lehmann
· May 14, 2017
It's just amazing. It blocks everything, from sneaky stuff trying to get into the temporary files (AppData), websites, just everything. There's nothing better for the battle against malware.
Tero Ranta
· May 23, 2017
Premium version is too expensive but you don't really need it. Just get the free version and scan your device daily.
Evyatar Reiter
· May 19, 2017
Somthing realy bad happend today to Malwarbytes ! Update 3.1.2 killed it !!! No option to turn Web protection to ON !!! Even after an hour ! No option to scan !!! What happend to you ???
Please call back version 2 !!!
Version 3.0.6 or 3.1.2 are dead !!!
Sebastiaan Zuidweg
· May 12, 2017
Been using Malwarebytes Anti-Malware for years on multiple machines. The latest version, 3.x, has it all. I highly recommend it. Worth every cent.
William Hohmann
· May 15, 2017
This is by far the best program I have seen for years. Would have been nice to find it back with ME.
You're not being punk'd; we're a real company :) But a huge thanks to Will Ferrell from the "mall-wear-bytes" team!
Encountering the Wild PUP

Have you heard about Ted? And we're not talking about the bear in the movies. We're talking about RoughTed, a large malvertising operation that's been going on for awhile.

A look at RoughTed, a purveyor of ad-blocker aware malvertising responsible for a range of scams, exploits, and malware.

Here are 5 cyberthreats that if you’re not frightened by, you should be.

Cyberthreats are typically boring, repetitive, and require a reasonably predictable remediation process. Here are 5 cyberthreats that if you’re not frightened by, you should be.

"With responsibility for global locations, I'm really concerned about ransomware. I'm confident that Malwarebytes' technology defends against advanced threats to help keep our employees and data safe." - Director of Network Operations and Information Security, Spellman High Voltage

Chrome users, you could be at risk of spilling your Windows credentials.

This article explains how Chrome users are at risk of spilling their Microsoft Authentication credentials by simply visiting the wrong site.

Do you use the popular Android App - Tencent? If so, be extra cautious as there is a ransomware targeting its users.

Because Android ransomware is on the raise, users should be extra cautious.

A decryptor for the #WannaCry ransomware has been discovered. But it only works for some users. Learn more.

A decryptor (Wanakiwi) that has been developed for WannaCry/WannaCrypt/wCrypt. There is a catch though, it only works for some operating systems.

The WannaCry ransomware exploded across the globe, impacting tens of thousands of computers in over 150 countries. It was the biggest ransomware attack in the history of the internet. Here's what Malwarebytes detected in the first five days.

On Friday, May 12, 2017, the WanaCrypt0r ransomware was detected in hospitals in the UK. It then exploded across the globe, impacting tens of thousands of co...

The WannaCry Ransomworm wasn't spread through email. Find out what our Research team discovered.

Security researchers have had a busy week since the WannaCry ransomware outbreak that wreaked havoc on computers worldwide. How did it all happen?

What should you do if you've been infected with the #WannaCrypt ransomware? Follow the below steps.

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Learn how to keep your data safe and your computing devices secure. #PrivacyAwarenessWeek

The Asia Pacific Privacy Authorities (APPA) began an initiative called Privacy Awareness Week, or PAW, with the purpose of educating users about current privacy issues and promoting the importance of keeping their personal information safe. This remains the core of why it exists for more than a deca...

For the second year in a row, we've been named a Stevie Awards winner. We were awarded "Fastest Growing Company of the Year" and "Executive of the Year". It's an honor to be recognized by the Stevie Awards for our hard work.

Malwarebytes™ was named the winner of two bronze Stevie® Awards in the 15th Annual American Business Awards.

"This whole disaster could have been prevented if people had patched their system," says Jerome Segura, a security researcher for software firm Malwarebytes. via TIME #lessonslearned

They fix bugs that can lead to attacks like the WannaCry ransomware.

Adam Kujawa, Malwarebytes' Director of Malware Intel, breaks down what ransomware is, the WannaCryptor ransomware attack, and how a ransomware attack can affect emergency services. via CNNTech

A ransomware attack is targeting organizations around the world and impacting tens of thousands of computers. CNNTech's Laurie Segall interviews Adam Kujawa, of cybersecurity firm Malwarebytes.

Get a summary of last Friday's WannaCrypt ransomware attack that hit over 150 countries.

A special compilation of security news related to the recent Worldwide outbreak of ransomware which has caused chaos for multiple organizations.