Reverse engineering – simple patch

Sat, 25 Mar 2023 00:00:00 +0000

I recently started practicing challenges on the picoCTF website. One of the challenges is to obtain a flag from a program. And the program despite its .exe name was ELF binary. Ok, so few initial steps:

Can I run it? -> no, it complains about some dependencies

There were some missing libgnat-7 dependencies. Hmm, how to install them? Docker containers come in handy. Especially that a binary while viewed in hex, had a Ubuntu 18 string. Thus I used Ubuntu-18 container and installed libgnat-7. 2) Can I run it now? -> Yes, but it hangs

Reverse-Engineering on Tomasz Jarosik blog

Reverse engineering – simple patch