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Archive for June 1st, 2020

XLMMacroDeobfuscator: An Update, (Mon, Jun 1st)

XLMMacroDeobfuscator is an open-source tool to deobfuscate Excel 4 macros. I wrote diary entries about it here and here.

In my first diary entry, I remark that I also had to install a missing Python module. This is no longer the case with the latest versions, I just install it with a single pip command.

The author also commented on my diary entry, suggesting the use of a couple of options to yield a cleaner output ready for grepping.

Like this:

Indeed, this provides cleaner output when grepping for http URLs, for example:

And this output can also be used to extract the relevant macros, with inverted greps for RUN, GOTO, …, like this:

 

Didier Stevens
Senior handler
Microsoft MVP
blog.DidierStevens.com DidierStevensLabs.com

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