Crypto Bank

• Author: Maxime Arthaud < [email protected] >
• Type: pwn

Description

Hello Sir,

I work for the US Government. I have reasons to believe that the THC Crypto Bank is conducting illegal activities. And they don't pay their taxes..

One of my coworkers told me you helped us in the past. Could you do something for me? Break into their server or something?

If it can help, I heard they use some top-notch security tool..

nc localhost 5555

How to run the challenge

First, make sure you have docker installed.

Then, run make build to build the image for the challenge.

Run make export to get the files provided to the challengers. It should create a directory export containing the files.

Finally, run make run to start a container running the challenge. You should be able to connect to localhost:5555.

Happy Hacking!

Writeup

See WRITEUP.md

Files provided to the challengers

• cryptobank
• cryptobank.c
• libc.so.6

Build the docker image

make build

Run the docker container

make run

Get the provided files

make export

Update the flag

Update src/flag then make build

Show container logs

make logs

Clean

• make clean removes the container and the provided files
• make clean-all removes the container, the docker image and the provided files