Detect the compression methods of Repackers ?

[FitGirl]

Originally Posted by SAM2712

I don't know about fitgirl Work...
But I have some tool from fitgirl Installer uses for Extraction
If u find Helpful , I want to hear some Point out

These files are taken from my Witcher 3 repack.
And they won't tell you much about compression probably.

But you need to know, that Witcher 3 packages uses 4 types of compression algoes in their packs. And only common one is deflate. Everything else you have to find out. Maybe temp files will help you, maybe not

Regarding my bin's. Of course I use not only LZMA in FreeArc, but other compressors too. All public, though. I brute-force different types of data to find the best method. I keep all recordings of back-log archives, so when I see similar data, I already know what to use.

I use multicore decompression/compression, when it's possible and gives speed benefit (like Mad Max, where deflate compression is on minimal, 1 level).

Nothing special, leading Russian groups like RG Mechanics or RG Revenants do the same. Also groups (especially Revenants) have special tools and CLSs for compression/decompression Unreal packages or BINK videos. And of course they aren't public.