Saturday, 10 October 2009

crackme11-day4/5/6

In my last post I had an estimation which was over optimistic.
I managed to have a keygen coded and a solution written three days ago, but I wanted to have some feedback before posting them here. So two days ago I spent sometime getting some more info about hardware breakpoints vs software breakpoints and anti-debugging with hardware breakpoints, namely:

http://www.scribd.com/doc/6825346/590BypassHardwareBreakpointProtection
http://www.technochakra.com/software-breakpoints/
http://www.nynaeve.net/?p=80
http://www.nynaeve.net/?p=81

I spent some time trying to get a little more info on variable argument's functions, but I wasn't getting any results, so I started with crackme12.

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