Cheat Engine

[Zombi3]

Ollydbg doesn't make permanent changes LMAO thats funniest thing i have heard all week.Btw thanks Cx ...

[xarchelo]

ollydbg doesnt make permanent changes unless you save them

for example if I were to close ollydbg it wont save my changes... thats what I meant
jump inversion arent idiotic...

[Pseudo Xero]

[xarchelo]

to tell you the truth I have only been using olly for a week before I used other programs for cracking
BUT IM NOT A RETARD

[Ksbunker]

I really liked this crackme...

I managed to beat it last night and let everyone on irc know too



The most interesting thing about this crackme is how the "enter password> " gets formatted/decrypted. Similarly with the result messages both "win & wrong". From 401000 onward to a JMP, its just setting up the stack for the decryption loops. I'm at work atm, and don't have access to olly or anything. But there's two loops that iterate through a string of chars in memory and perform some string instructions. You can tell the first loop is to output/print the "win" message (its like cmp [register], 3) and the second is to output the 'wrong' message (...cmp [reg], 5).

Anyway, I really liked that bit, very cool.

[Zombi3]

[Cx]

[Zombi3]

Digging myself a deeper whole... dude since day one of the lena151 tutorials i knew ollydbg could save the modified opcodes.

[SunBeam]

Good work, Cx

[Pseudo Xero]

[opcode0x90]

Perhaps referring to IDA first is a good idea after all. Pure tracing in ollydbg leads me nowhere lol, I then realize 90% of the function I was tracing is stdlib functions.

The main algorithm is nothing but,

(Password + 10) = (1337 + 3)

Solve the equation

--------------------------------------------------------------------

Moral of the story:
always refer to IDA for library functions. With the help of IDA, it took me only 15 minutes to solve it.

[Cx]

SB/Xene: thanks.
Opcode: Yeah, this time I focused way less on the algorithm and more on the rest of it. Last time nobody cracked it, and I figured they didn't want to go through the hassle of a longer/harder algorithm (I think I had bitwise operator loops lol).
Also Zombi3, just realized what you said. Next time use "". >_>

[nog_lorp]

Poo, my serial-me was way harder than your codex, and totally like, noone noticed .

It has some cool tricks, and the math is wai harder .

Now I cant find where I posted it though 0.o

[Cx]