Network Security: Detailed info on Re: blocking BHX files with MIME

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Re: blocking BHX files with MIME

from [Peter Kosinar] Network Security

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Subject:	Re: blocking BHX files with MIME
Date:	Wed, 17 May 2006 03:33:16 +0200 (CEST)

Hello,

YmVnaW4gNj

Is it really the BHX (=BinHex) file format? Decoding the MIME sequence yields "begin 6" (+one incomplete character), which looks very similar to the UUE format. If it is actually UUE, the signature might be a bit too weak because a perfectly valid UUEncoded file could start with "begin 4" or "begin 7" or any other octal digit, as the three octal digits following "begin" specify the permissions of the encoded file.

I forward this info as I've seen some BHX files come in recently
attached to fake bounce messages, I presume its a virus of some kind

I'd expect them to be instances of the Win32/VB.NEI (NOD32) or W32/Nyxem.E or whatever your favourite antivirus calls it.

Peter

--
[Name] Peter Kosinar   [Quote] 2B | ~2B = exp(i*PI)   [ICQ] 134813278

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