Cheat Engine

[oib111]

kaspersky get the fuck out my topic

[nog_lorp]

oib111, NOP is one byte. 0x90. 0x90 0x90 0x90 is NOP NOP NOP.

As for what you want to do, any type of integrity check can be defeated - integrity checks rely on themselves/their users being trustworthy.

What I would do:
1)Remove an important part of the code (some core function, perhaps all but the protective code), set it aside.
2)Take the MD5 hash of the rest of the code.
3)Encrypt the set-aside code with Rijndael encryption (AES), using the MD5 hash from earlier as the encryption key. Store this encrypted code as data
4)Have the stub protective code create a thread to
*MD5 the code section.
*Decrypt the data into another section.
*Do this repeatedly.
*Start the main thread.
5) Perhaps also have a check in the encrypted code of the MD5 routine, to make sure it hasn't been changed to always return the correct MD5.

This, as always, is beatable. But it will be vastly harder to beat than any other option.
~nog_lorp

[Symbol]

it would be easy to crack it if u know that he did it this way but it should be good enough to block most ppl... it looks like a hard crackme xD
btw what are u trying to do?
there are easier ways to encrypt good enough unless ur making a crackme so not every noob can crack it O_o
if ur not making a crack me then encrypt it in an easier way :O

[oib111]

I am making a crackme. I want to encrypt the password.

[Symbol]

so encrypt it as much as u can

[oib111]

I don't know how. I mean I could use an encryption algorithm to encrypt the text. But then the password is still a string and the password

[Ksbunker]

Absolute most basic of encryption functions. Harded Coded string is 'ltcvoles'... starts a loop, decreases each char by 1, prints word.

I made a crackme the other day that has a quite a good hardcoded encryption routine, I think x0r has a copy of it. PM if you wan't it.

[nog_lorp]

oib: Stay focused with your question man.

To encrypt the password, you can:
store only the MD5 hash of the password in your program.
when the user enters a password, MD5 hash IT, then compare the two hashes.

~nog_lorp

[oib111]

ksbunker. I'm doing this in C++, nost asm, but thx for the code. You just made me realize something I could do.