Microsoft has warned people about a new trojan that is disguising itself as Microsoft's no-cost antimalware program Microsoft Security Essentials.
This imposter is known in the technical world of antimalware combat as "Win32/FakePAV". FakePAV is a rogue that displays messages that imitate Microsoft Security Essentials threat reports in order to entice the user into downloading and paying for a rogue security scanner. The rogue persistently terminates numerous processes such as Windows Registry Editor, Internet Explorer, Windows Restore and other utilities and applications.
This fake software is distributed by a tactic commonly described as a "drive-by download" and shows up as a hotfix.exe or as an mstsc.exe file. Additionally, after the fake Microsoft Security Essentials software reports it cannot clean the claimed malware infection, it offers to install additional antimalware rogues (with names such as AntiSpySafeguard, Major Defense Kit, Peak Protection, Pest Detector and Red Cross). Lastly, this fake program will try to scare you into purchasing a product.
This software is a fake. Do not be fooled by this scam.
Microsoft Security Essentials can be downloaded and used at no cost by users running genuine Windows. So anything mimicking Microsoft Security Essentials but asking for any sort of payment is clearly up to no good.
If you have not already updated your security software please do so. Making sure your security software is up-to-date and has the latest definitions is the best way to prevent infections.