Print 25 comment(s) - last by random2.. on Apr 24 at 10:03 PM

Malware software targeted legitimate Windows files

Security vendor Malwarebytes has crippled thousands of computers around the world after a faulty update was applied to its software. The faulty security update applied to the software marked legitimate system files as malware code.

The company admitted to the problem on its official blog earlier this week and has since pulled the faulty update.

"At around 3PM PST yesterday [Tuesday] Malwarebytes released a definitions update that disabled thousands of computers worldwide," wrote Malwarebytes’ Marcin Kleczynski.

"Within eight minutes, the update was pulled from our servers. Immediately thereafter, users flocked to our support helpdesk and forums to ask us for a fix."

The specific operating system files that the malware update targeted included Windows.dll and.exe files. By targeting those files, the security application prevented them from running, taking IT systems and individual computers off-line.
One company that uses a software claims that the update knocked 80% of its servers off-line. Malwarebytes maintains that it has begun reworking its update policy to ensure the sort of mistake never happens again.

"We acted over-zealously in that mission and realise far superior procedures around updating are needed. More was expected of us, and we failed," wrote Kleczynski.

"We are commissioning several new resources to stop this from happening again. We are building more redundancy to check our researchers' work and improving our peer review."

Source: V3

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RE: Effective but risky ...
By Mitch101 on 4/18/2013 1:00:06 PM , Rating: 2
In McAffee's case Ive seen it flag its own virus definition updates as infected.

I just bought several copies of Malware bytes and think Ill wait till this weekend to install so they get it ironed out.

This happens to every vendor but thanks for the article DT may have saved me 3 rebuilds but Ill image them before I install just to be sure.

RE: Effective but risky ...
By RjBass on 4/18/2013 1:37:00 PM , Rating: 3
Not knowing about this, i downloaded, installed and updated Malwarebytes on a co-workers computer today. Had to run a scan for something she got into a week ago. She is a kindergarten teacher and about once an hour her computer would erupt into music and explicit conversations, much to the amusement and dismay of her students.

Malwarebytes did just fine, and didn't cripple anything, and now her computer is free from the problem. So that being the case, I can only assume the latest update is ok for use.

RE: Effective but risky ...
By random2 on 4/24/2013 10:03:52 PM , Rating: 2
This is one of the reasons I try to remove this piece of malware (McAfee) from PCs every chance I get. That and any Norton/Symantec product. System speed up is immediately apparent when these invasive, resource hungry programs are flushed.

"We can't expect users to use common sense. That would eliminate the need for all sorts of legislation, committees, oversight and lawyers." -- Christopher Jennings

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