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New variant W32/Feebs found

Myantispyware team February 22, 2006    

A new variant of W32/Feebs is making the rounds. Fellow handler Bojan has spent quite some time with de-obfuscating the JavaScript and VB code, and we’re still looking at what it does besides downloading base64 encoded versions of W32/Feebs. You might want to block access to

*.coconia.net
*.by.ru
*.kazan.bz
*.t35.com
*.freecoolsite.com
*.nm.ru

until the AV vendors have the patterns lined up.

New varian spreads as an email with subject “Secure Message from GMail.com user“, and contains a ZIP attachment (data.zip in the sample at hand), which in turn contains a file “Encrypted Html File.hta”, which contains the heavily obfuscated Javascript exploit code that triggers the W32/Feebs download from the above sites.

Update:
AV detection is available by now

BitDefender|7.2|02.22.2006|Win32.Worm.Feebs.1.Gen
Kaspersky|4.0.2.24|02.22.2006|Worm.Win32.Feebs.cb
McAfee|4703|02.22.2006|W32/Feebs.gen@MM
Panda|9.0.0.4|02.22.2006|Suspicious file
Sophos|4.02.0|02.22.2006|W32/Feebs-Gen
Symantec|8.0|02.22.2006|W32.Feebs

Thanks to SansBlog

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Author: Myantispyware team

Myantispyware is an information security website created in 2004. Our content is written in collaboration with Cyber Security specialists, IT experts, under the direction of Patrik Holder and Valeri Tchmych, founders of Myantispyware.com.

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