McAfee: New Worm Eats Your AV Software
We know you would never click on suspicious links in your email or download unexpected files willy-nilly, but we're willing to bet you know someone that would. Now would be a good time to remind them not to do that sort of thing. According to McAfee, there's a new worm slithering through cyberspace that likes to chew on your AV software. Like most malware, this one requires a little help from the end user.
The worm is spread by email with a link to a seemingly innocent PDF file or raunchy WMV download, though users who click will get much more than they bargained for.
"When a user chooses to manually follow the hyperlink, they will be prompted to download or execute the virus," McAfee warns. "When run, the virus installs itself to the Windows directory as CSRSS.EXE (not to be confused with the valid CSRSS.EXE file within the Windows System directory). Once infected the worm attempts to send the aforementioned message to email address book recipients."
McAfee says it can also be spread through accessible remote machines, mapped drives, and removable media through Autorun replication. Once infected, the virus attempts to cripple and delete security services, including popular AV software like AntiVir, Avast, AVG, McAfee, Panda, and a whole bunch of others.

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September 13, 2010 at 12:56am
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Vano
September 11, 2010 at 8:53am
This article would be even more useful if provided any kind of information how to clean up the virus...
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charcaroth
September 11, 2010 at 8:10am
I would imagine the worm refuses to eat Norton more for the bad taste it leaves in folks' mouths after 6 years of producing sub-par products. Funny to hear someone brag on Norton who's not talking about the DOS version. As you might recall, it took special tools to uninstall Norton 2003-2006 and it was installed on tons of new PCs. In those days, I'd have welcomed malware that would remove it.
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Blaze589
September 10, 2010 at 1:56pm
I remember in the past I installed an AV program on a guest computer and set up a password in the AV program to prevent tampering. With the password enabled you couldn't even uninstall the program without the password. I wonder if in this case it may help if you set up a password in the settings of the AV program.
Edit: I checked and it seems entering a password is a protection against malware attacks as well as a direct access deterrent.
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Oathbreaker
September 10, 2010 at 11:00am
The line "The worm is spread by email with a link to a seemingly innocent PDF file " is misleading because the email does not link to a PDF file. It links to a .SCR file but /appears/ to link to a PDF file. I realize this is what you meant but without knowledge of the actual misdirection in the email your sentence could be taken to mean the PDF file is infected.
From McAfee: "The URL does not actually lead to a PDF document, but rather an executable in disguise, such as PDF_Document21_025542010_pdf.scr served from a different domain"
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Lhot
September 10, 2010 at 10:03am
Norton has Tamper proof Protection, which prevents this sort of malicious attacks. Haer that all you AVG folks? On a side note, SuperAntiSpyware also has a form of tamper-proof protection :)
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Eoraptor
September 10, 2010 at 8:12am
This is why I use a multi-tiered approach to protection, my computer itself has Avast, backed up by Iobit Security 360, Iobit Advanced System Care, and the windows Firewall (I have trouble getting other firewalls to work with Trillian and Homegroup for some reason, but I'm begining to think that's something to do with the network drivers of windows7 on my ancient nforce2 board downstairs than anything), and use Nitro PDF instead of pigware like Acrobat (though in this case that's irrelevant)
And then my DDWRT configured router has some protections, and of course, I use a web email and not local client, and do the old standbys of never opening thing's I am not expecting.
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