I received a strange letter in the mail, when I unfolded the document inside, I discovered this matrix bar code. Can you figure out what it contains?
1 month ago
Preaty easy in comparasion with R* chalenges
5 months ago
An interesting challenge
7 months ago
this should be 10 pointer.. it is 30 points for free..
btw.. nice challenge..
some forensic challenge memories came back..
1 year ago
Really, really, REALLY cool challenge to get into reving!
This was Easy as 10 pts,
can easily be done with QR Decode + gdb only
Watch out for smartphone qr code scanners - like to cut out strings ;)
2 years ago
Hi all, is there anyone who could give some hints?
I have an elf executable file now, and I don't know what to do next.
Do a static analysis of the file. Disassemble and try to understand how it works and what it contains.
You can also look at its headers, strings etc..
9 months ago
How did you get elf executable file? Thank you
The QR code may help a bit here. The question to ask is - "How to convert a binary file into a string?"
Excuse me!. I can't watch
You might be saving the decoded binary data as ASCII-HEX file. Use CyberChef(https://gchq.github.io/CyberChef/ ) to decode Base64 and then download(save icon on output window) the file as binary.
Very satisfying. If you have trouble, look for a book called "Practical Binary Analysis" by Dennis Andriesse. Amazing book explains everything perfectly.
I should admit that i cheet but i'm learning from You guys, so thank you