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Yet another MacDefender variant: MacGuard

Published May 25th, 2011 at 7:34 PM EDT , modified May 26th, 2011 at 6:13 AM EDT

Another new trojan has appeared in the MacDefender/MacSecurity/MacProtector line.  This time it’s called MacGuard.  From the initial reports, it does not sound like it is significantly different in most respects from the earlier versions.  However, there is one notable difference: it no longer requires an administrative password to install.  I am unclear on this point exactly why…  some sites report that it is installed in the user Applications folder rather than the global one, while others give uninstall instructions that refer to the main Applications folder.  I will report more as I learn more, but for now it appears that the same old MacProtector removal instructions will work, with minor modifications.  First, and obviously, you need to look for the name MacGuard in addition to the other three when removing.  Second, look in both the main Applications folder and the one in your user folder and remove MacGuard from wherever it is.

If anyone has additional information, please let me know, and if anyone finds a live link to the malware, please let me know so I can get a copy of it.

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One Comment

  • Jennifer says:


    My macbook was infected with the “MACGuard” malware on May 28 th while browsing my most frequented blogs. As you said it does not require any administrative password to install. I spoke with Apple support and we tried to find it in a variety of applications and could not identify it as “MACguard”. I just followed your instructions and found it in my applications folder as a strange sounding file, if that was it,? and threw it in the trash and emptied. It was called “ASP pr VPE” with numbers beside it. Please forgive me but I actually did not memorize the actual file name. When I clicked on it, it came up as an icon called “warning” with digitized letters. I really hope this has cleared it for now, but I will let you know if it returns as it seems to be the latest version. Thanks for the help…oh and I also downloaded clamxav too for future use.

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