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Small bug

 
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Redouane
Master Cheater
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Joined: 05 Sep 2013
Posts: 363
Location: Algeria
PostPosted: Wed Jul 02, 2014 4:14 pm    Post subject: Small bug Reply with quote
In the auto assembler,sometimes,when you specify a symbol but not its module,it may not inject code successfully:
example code:
Code:
msvcrt.exit:
ret
db 90


After this,go to the memory viewer,rightclick,choose goto,and type in msvcrt.exit,now,after reclicking 'goto',try typing in the word exit,the bytes are different,in the first one you will see a ret followed by a nop,everything is fine,but in the second one,you'll notice a 'mov edi,edi',this because the symbol handler does not make a difference between msvcrt.exit and msvcrt._exit,it spells both of them as exit.
More details in attachments.

sym.png
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 Filesize:  9.02 KB
 Viewed:  6045 Time(s)

sym.png
to_post.png
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 Filesize:  39.85 KB
 Viewed:  6045 Time(s)

to_post.png
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Redouane
Master Cheater
Reputation: 3

Joined: 05 Sep 2013
Posts: 363
Location: Algeria
PostPosted: Fri Jul 04, 2014 1:56 pm    Post subject: Reply with quote
[UPDATE]
The bug is in the symbol-handler,it does not differenciate between exit and _exit,here's what I have from olly dbg.

exit.png
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 Filesize:  7.05 KB
 Viewed:  5980 Time(s)

exit.png
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