[BUG][WINDOWS] Segfault on COFFSymbols & StringTable bytes exceeding memory committed size

[malware-unicorn]

universal/loader_windows.go

Line 112 in daefaa8

hbuf[index+pefile.FileHeader.PointerToSymbolTable] = b[index]

The combined total size of the COFFSymbols and StringTable buffers can exceed the memory committed size of the ImageSize, thus causing a sefault in trying to write to a memory location not allocated.

Tested on Win7 64bit vm on QubeOS.

Recommendation:
Instead of allocating for the total ImageSize, allocate these sections separately or adopt CopySections function from: https://github.com/fancycode/MemoryModule/blob/master/MemoryModule.c#L176