mpclient: function at 0x5a741c8a attempted to call an unknown symbol

[zer0py2c]

Whats causing this error? :-(

[JEglez]

did you find the solution for this? I'm getting the same error

[Gecko05]

I'm currently facing the same issue, in my case, it seems that the winapi functions are not being set into the crtexports so they remain unknown when the DLL is executed. Noticed that the constructors for these winapi calls are also not being executed somehow, so crtexports.size is 0.
Could we be missing something when compiling or linking? @taviso

[Gecko05]

Ok I fixed this by following the solution proposed at the end of this thread: https://stackoverflow.com/questions/48212805/why-is-attribute-constructor-in-my-shared-library-not-working

Somehow, when compiling, the constructors for every winapi component are not being linked and thus never executed. So what I did was just append a dummy function at the end of each .c file in winapi and then calling them all somewhere in pe_linker.c.

[Gecko05]

Gecko05@7225e37
See this commit in my fork to know what I did to compile and run it properly. It's about a bunch of loadSomething methods being called from pe_linker.c

Left some comments on the commit as well.

[OzzyKampha]

@Gecko05 i tried to use your repo, but i got the same error. Can you try make it in a docker container?

[MrX0r]

@Gecko05
Your repo is getting the same error
./mpclient eicar.com
mpclient: function at 0x5a6aaae8 attempted to call an unknown symbol
Trace/breakpoint trap

exiftool mpengine.dll | grep 'Product Version Number'
Product Version Number : 1.1.24030.4

What could be the reason??

oh yes, in your repo the file CriticalSection.h is missing in the peloader folder

[renini]

Did anyone ever get this to work again on a recent build?