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Any way to compress with UPX but make it difficult to decrom

Posted: Mon Jul 28, 2003 5:21 am
by ricardo
Hi,

I want to compress a file (executable) but want t compressor (reliable one) that let me compress in some way that isnt easy to decompress the file (not at run time, i mean i dont want nobody to get out the compression and have the original one, i know its impossible, im just looking for a more difficult way).

If there is other free compressor that can do that and somebody knows it will be nice to share the tip. :D

Thanks

Posted: Mon Jul 28, 2003 7:39 am
by dige
Hi ricardo,

you need a tool called upx-scrambler.
Or use my tool: STupX ( 4in1 compile pb and ressources, compress & scramble )
http://www.sunset-team.de/download

regards,
dige

Posted: Mon Jul 28, 2003 8:28 am
by gnozal
The UPX scrambler only hides the UPX signature ; it does not prevent the EXE to be unpacked with some tools like GUW32 ...

Posted: Mon Jul 28, 2003 9:15 am
by Karbon
Is there anything that does prevent such unpacking?

Posted: Mon Jul 28, 2003 9:37 am
by gnozal
I think no packer / crypter can stop a good hacker ...
You can add checksums to your code, start different timers with different integrity checks (so the hacker thinks it works but after 10 min it don't), use antidebugger tricks, use self modifying code, and so on, but again, nothing will stop a good hacker (it only makes it harder to crack) !
Sad but true ...

Have a look at all these unpacking tools ...
http://www.absolutelock.de/construction/releases.html

Posted: Mon Jul 28, 2003 12:25 pm
by Kale

Posted: Mon Jul 28, 2003 3:53 pm
by gnozal

Posted: Tue Jul 29, 2003 6:00 pm
by ricardo
Thanks to all for your answers :D :D :D