Cheat Engine

kitesan · Posted: Wed Jan 07, 2015 6:38 pm Post subject: Little Question

why integrity checks in AC Unity couldn't be nopped? everybody say that, why?

Geri · Moderator Reputation: 111 Joined: 05 Feb 2010 Posts: 5636

Because nop is not the ultimate solution to every problem. There is a reason for making more complicated scripts than nop nop nop.

Dark Byte · Posted: Thu Jan 08, 2015 6:34 am Post subject:

you can nop it, but it requires a lot of nopping besides just 1 nop
you need to find all locations that handle the part where check is done if the integrity check failed or not, and nop the proper things there.
There's more than 10 such locations so you'll have to make sure you get every last one of them and that all changes are done at the same time

and it's probably easier to just make it scan a runtime made copy instead of nopping, as that is easier to find

an example that it used to work in 1.1 and 1.3:
http://www.cheatengine.org/forum/viewtopic.php?t=577567 (he uses the technique I describe, but has missed one or two checks)

kitesan · Posted: Thu Jan 08, 2015 10:34 am Post subject:

thanks

i have found the main check by checking what does access to the main exe's module, i have no clue on how to find the rest