Beware fake Microsoft security essentials

Microsoft Security Essentials is a legitimate antimalware app, but a new rogue antivirus attack hijacks the brand as well

Microsoft Security Essentials is fake. Well, it is and it isn't. Microsoft Security Essentials is a free antimalware protection program from Microsoft, but a new malware threat identified by security software vendor F-Secure is also masquerading as Microsoft Security Essentials. You want to avoid that one.

The new malware attack is distributed through a drive-by download as either hotfix.exe or mstsc.exe--both reasonably benign and almost legitimate sounding file names that might not raise red flags with some users.

The "alert" from the threat steals the Microsoft Security Essentials brand, including the little blue fortified castle icon. The software then displays a seemingly comprehensive list of antimalware solutions--including all of the top names that users are familiar with such as Trend Micro, McAfee, Panda, and Symantec-- and identifies those that are capable of detecting and blocking this nefarious threat.

The F-Secure blog explains, "Surprisingly, the only products that seem to be capable of handling the infection are AntiSpySafeguard, Major Defense Kit, Peak Protection, Pest Detector and Red Cross. Never heard of these? No wonder. They are all fake products."

The attackers are counting on users being naïve enough to take the bait and agree to be "saved" by purchasing one of these awesome antimalware tools to help eradicate the threat. But, since these are all rogue antivirus programs what you really end up with is some sort of Trojan that opens the system up to further malware compromise and exploit.

Don't get confused, though. As mentioned above, Microsoft Security Essentials is a legitimate antimalware application as well. It is offered for free by Microsoft, and is in fact a very capable defense against malware. Microsoft just recently expanded the availability of Microsoft Security Essentials to small businesses as well--making it free to install on up to ten PCs.

I must say, though, that I have never understood how anyone falls for rogue antivirus attacks. It seems to me that users should know whether or not they have some sort of malware protection installed, and if so which software it is. If no antimalware is installed, or if the fake alert is apparently from a program other than the one that is installed--why would anyone take it seriously?

Did magic antimalware fairies stop by in the night and install this new beneficent tool? And, doesn't it seem at all suspicious that this strange antimalware detection is capable of scanning the PC and identifying this new threat, but invites you to purchase something else to actually deal with the problem?

F-Secure detects this new rogue Microsoft Security Essentials threat as Trojan.Generic.KDV.47643.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags online securityspamantispamMicrosofttrojan horsesvirusessecurityf-securephishingmalwareantivirus

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Tony Bradley

PC World (US online)
Show Comments

Cool Tech

Breitling Superocean Heritage Chronographe 44

Learn more >

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?