Tool Uncrypt11 - a fast, no BS tool to decrypt mach-o binaries on iOS 11+

July 14, 2018

Taken from reddit

This is the version of uncrypt that works with iOS 11. For iOS 10 and below, use https://github.com/shmoo419/uncrypt or one of the many other alternatives.

As someone who likes to reverse engineer and mod things, I needed a way to decrypt binaries when Electra1131 released. The version of my tool I linked above does not work on iOS 11 because the kernel kills "untrusted binaries", which causes a mountain of problems. So I made this. Why did I make this? I wanted to get familiar with the mach-o file format and figured other people would find it useful.

I know BFDecrypt is a thing, but I don't like how it dumps the entire IPA because for my purposes I only need the binary. So, as you can guess, my tool only dumps the binary. I also do not want to promote piracy, so the cryptid is not flipped. This tool is intended for research purposes only. If this doesn't suit your needs, use another tool.

uncrypt11 is in BETA. If you encounter any problems, please open an issue on github.

To get it, add my repo: http://shmoo419.github.io/ and install uncrypt11.

To use: /electra/inject_criticald pidofapphere /Library/MobileSubstrate/DynamicLibraries/uncrypt11.dylib

See the source here: https://github.com/shmoo419/uncrypt11

Enjoy!

Rook · July 14, 2018

Very nice work!

Has there been any changes since the latest test version?

July 14, 2018

Just now, DiDA said:

Very nice work!

Has there been any changes since the latest test version?

removed redundant code ? Nothing has changed as far as functionality goes. I am pushing another fix rn because I found another mistake

Rook · July 14, 2018

3 minutes ago, shmoo said:

removed redundant code ? Nothing has changed as far as functionality goes. I am pushing another fix rn because I found another mistake

Alright, cheers!

I'll download from the repo!