App crashing on specific exe

[greenozon]

Found out very tricky PE64 binary

it has lots of surprizes!
eg:
on d-n-d event:

Directories??!

it CRASHES on clicking Entropy button

file (no virus no malware, just a very nice digital clock)
Clock7.zip

[upiter]

@greenozon Alex, there are some issues with your file Clock7.exe file that make it different from the ordinal executable:

1. PE header is located inside DOS header (at 0x10), so it's not allowed to edit DOS header (it's already optimised to contain PE header, so editing it will corrupt both headers).

2. File doesn't contain any Directory, NumberOfRvaAndSizes = 0.

3. File is encrypted with simple algo (rol/ror/xor).

4. Code is compressed using aPLib compression library.

Anyway there is a bug in Entropy calculation code.