Tuesday, November 3, 2009

MaCatte scareware fools users by masquerading as McAfee


MaCatte Antivirus is a rogue av that attempts to impersonate McAfee scanners in order to scam users.

This scareware has been seen to be using a bogus My Computer online scan similar to ones we've seen here, here and here.


The online scan can be seen on this url:


The downloader being served from this url is time-sensitive and will not work after a period of time. A session ID of some sort is embedded on the binary executable itself. After such time has elapsed, the downloader tells the user to contact MaCatte Antivirus support people. This prevents reverse-engineers from replicating the infection and gathering samples for analysis.

Presence of these files / folders would signal infection from this scareware:
C:\Documents and Settings\All Users\Application Data\msca
C:\Documents and Settings\All Users\Application Data\msca\MaCatte.ico
C:\Documents and Settings\All Users\Application Data\msca\mcull.exe
C:\Documents and Settings\All Users\Application Data\msca\msc.exe
C:\Documents and Settings\All Users\Application Data\msca\Viruses.dat
C:\Documents and Settings\All Users\Application Data\Microsoft\Media\WPtect.dll
C:\Documents and Settings\All Users\Desktop\MaCatte.lnk
C:\Documents and Settings\All Users\Start Menu\Programs\MaCatte
C:\Documents and Settings\All Users\Start Menu\Programs\MaCatte\MaCatte.lnk

Unsuspecting users are set back from their hard-earned money by a hefty $99.

Stay away from these rogue apps.


  1. the files that this goes under is rarsfx2.exe I also noticed that on the tool bar it is listed as MAC.exe I found the file , and deleted it from the register, but it still auto loads during start up.

  2. it is identified as "TR/ATRAPS.gen2" Trojan on the registry you will see a file thats called rarsfx, and MAC2. I've deleted the rarsfx from the registry, but it auto starts when you start the computer.If anyone knows how to delete it.let me know.