Control Sum Checkup always fails after a few seconds

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191
Posts: 12
Joined: Wed Mar 26, 2014 7:54 pm

Control Sum Checkup always fails after a few seconds

Post by 191 »

Hello everyone,

I just got another problem with Enigma Protector 4.10.


It seems like the control sum checkup fails always after about 8 seconds.

The only change i make during runtime is deleting the module from the LIST_ENTRY32's ( to hide the module ) and I delete the DOS header.

It does not matter which options I check, as soon as I check "Use control sum checkup" this problem appears.
Enigma
Site Admin
Posts: 3085
Joined: Wed Aug 20, 2008 2:24 pm

Re: Control Sum Checkup always fails after a few seconds

Post by Enigma »

Yes, Enigma Protector does check the dos header too, it should not be manually deleted.

Btw, what is the purpose to delete dos header?

If you delete it to increase the strength of protection somehow, then it is absolutely wrong way to do.
191
Posts: 12
Joined: Wed Mar 26, 2014 7:54 pm

Re: Control Sum Checkup always fails after a few seconds

Post by 191 »

There's a bug in ollydbg which prevents ollydbg from jumping to the module entry if the dosheader is corrupt.
Alec
Posts: 82
Joined: Thu Feb 20, 2014 9:35 am

Re: Control Sum Checkup always fails after a few seconds

Post by Alec »

If there is a bug in olly then there is a plugin that fixes it, there is no need in performing security thrue obscurity.
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