Questions tagged [upx]

the Ultimate Packer for eXecutables is a free, multiplatform, open-source executables packer.

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How to unpack manually an upx packed elf file

I am trying to learn to manually unpack an upx packed elf file. The examples I have found are for Windows, mostly with Ollydbg, and as I see the first step is to look for pushad and popad instructions....
2
votes
1answer
43 views

How can you dump the unpacked version of a packed library/plugin from memory on macOS?

I'm dealing with a custom-upx packed library that I'm trying to unpack. System is macOS. Given it's a library/plugin, it doesn't have a standalone entrypoint. I ran it through a disassembler but wasn'...
1
vote
1answer
77 views

Problems with relocation when unpacking

I'm trying to learn how to do basic unpacking EXEs. I've read into how the PE header works, sections, the IAT and I already know a fair bit about assembly. I started with compressing my simple x64....
0
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0answers
45 views

problems with figuring out if its vmprotect or upx

my name is eleven and I'm new to reverse engineering and I have a question. after scanning my program I have wanted to reverse engineer I have walked into a problem. this is a program I'm trying to ...
0
votes
1answer
383 views

Newbie unpacking diffculties

I'm trying to unpack a small application I compiled with VS2015 (v140_xp) and packed with UPX 3.93 (option -1). The application checks for IsDebuggerPresent and uses std::cout, nothing fancy. The ...