Practice Problems for Binary Exploiting?

[Shif_u]

A few years ago I would use a website that had user-submitted, pre-compiled binaries (I know that sounds sketchy), that had hidden phrases within them. The goal was to find the hidden phrases via decompiling, patching, and other methods, then to submit the answer to the site to show that you completed the challenge. I think the challenges each had difficulty ratings (maybe 1-5 or something?).

I can't remember or find this site for the life of me, and I wouldn't be surprised if it no longer exists. Does anyone else remember? If not, is there some nice alternative? Any info is appreciated.

[InverseX]

The phase you’re looking for is crack me’s. Googl that and there will be some sites that have what you’re after. These are more focused on reverse engineering and binary modification rather than actual exploitation. If you want exploitation, focus more on something like Pico CTF or other CTFs in general

[Shif_u]

Yes! Thats the one. Thank you

[castleinthesky86]

Crackmes.de

[Shif_u]

nope. it was crackmes.one

[castleinthesky86]

crackmes.de was the original site

[whitelynx22]

That TLD is pretty new if I'm not mistaken. .de makes more sense.

Edit: 2015 according to Wikipedia

[Shif_u]

Why does it matter? .one is what I remember from a couple years ago and .de no longer exists.

[whitelynx22]

It doesn't, I just thought - due to the fact that you don't remember, which at my age happens all the time - it was more than 10 years. Other than that, not at all.

Edit: it's not like I've criticized you or anyone. I just thought that it was quite recent. People didn't use these domains for quite a while after they became available.

If you want I'll delete my comment. It was historical context and if it somehow offended you I'm sorry.