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Rootkit. Shape Changer, removes all entrys for AVG

Discussion in 'Virus & Other Malware Removal' started by RichTheTech, Jul 16, 2007.

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  1. RichTheTech

    RichTheTech Thread Starter

    Apr 22, 2005
    I was cleaning a customers PC today and came across something that I have not seen before. their original complaint was that AVG antivirus was not working and could not be reinstalled. Suspecting an infection, I installed and ran Super-Antispyware. It came up with various Vundo variant trojans and rootkits, but the problem still remained with AVG. I inserted my flash drive to reinstall AVG and it was missing from my drive too! To shorten the story, the rootkit was removing all entries in Windows Explorer with the letters "AVG", because when I renamed the AVG installation file "AV" it reappeared on my drive. Have you heard of a rootkit that has been targeting the "resident" antivirus in this way? I presume that it is able to cripple the AV (whether AVG or another AV) by blocking access to its files by name. Any thoughts?
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