m4ul3r/writing_nimless

Writing Nimless Nim - Slides and source for BSIDESKC 2024 talk.

Writing Nimless Nim

Talk that was given at BSIDESKC 2024 about how to write Nim code without the Nim and C Runtime. This repo will serve as a living document to expand on concepts for writing NRT-less and CRT-less code.

Talk

Post-Talk Updates

• 0x11 - simple_instance - Creating an instance to reuse function pointers and store global information while the program is running.
• 0x12 - nimless_DLL - Create a simple DLL in nimless, implement one variation of thread pool injection, and utilizing compiled time encryption and runtime decryption of a payload.

Future Plans

• Create a lib folder for a finalized, easy to use library.
• ?

Related Talk

• nim_for_hackers2

writing_nimless's Issues

Compiler

What compiler you use for build 0x12 main_dll.bat
gcc(mingw)
or vcc(msvc)?

I have this error when build via gcc

 @minstance.nim.c.o:@minstance.nim:(.text$getProcAddressHash__utilsZgpa_u18+0x119): undefined reference to `strlen'
collect2.exe: error: ld returned 1 exit status