[unisog] What are doc.bin files?

Dennis Viner dennis_viner at kgi.edu
Wed Jul 18 23:02:57 GMT 2001


I believe I've seen Word files sent from Macs with doc.bin extensions.

Dennis Viner
Network and Systems Administrator
Keck Graduate Institute

> -----Original Message-----
> From: DelVecchio, Anthony R. [mailto:ARDELVECCHIO at stthomas.edu]
> Sent: Wednesday, July 18, 2001 3:38 PM
> To: 'binzina at mbl.edu'; unisog at sans.org
> Subject: RE: [unisog] What are doc.bin files?
> 
> 
> Sounds like a way to sneak malicious code past e-mail 
> filters.  Has anybody
> virus checked or looked at one of these files?
> 
> -----------------------------------------------------
> Tony DelVecchio
> Network Security Manager
> University of St Thomas
> St Paul, MN USA
> 651.962.6246
> -----------------------------------------------------
> "Power corrupts.  Absolute power is kind of neat."
> John Lehman - Former Secretary of the Navy
> 
> 
> -----Original Message-----
> From: Barbara Inzina [mailto:binzina at mbl.edu]
> Sent: Wednesday, July 18, 2001 4:30 PM
> To: unisog at sans.org
> Subject: [unisog] What are doc.bin files?
> 
> 
> People here are starting to get email attachments with file names that
> end in "doc.bin".
> 
> They are having trouble reading them.  They appear to be Word 
> documents,
> but the ".bin" confuses some of the email client programs.
> Surfing to find out what they are, we found at least one web site that
> said:
> 
> "The file has been called guide.doc.bin to help ensure 
> reliable download
> using a web browser, but after downloading you should rename the file
> guide.doc)"
> 
> Does anyone know what this is?   Was I asleep while a new 
> technique for
> encoding attachments was invented?
> 
> --
> ______
> Barbara Inzina
> Network Manager
> Marine Biological Laboratory
> Woods Hole, Massachusetts
> 



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