It seems that, at least on my debugging machine, when I use!mona to find the metasploit pattern immunity debugger freezes.
Normally in the case of an SEH-based exploit we will want to (1) overwrite SEH with a pointer to POP POP retn and (2) we will overwrite nSEH with a short jump over SEH.
[email protected] pentest/alpha2# msfpayload -l.snip.Before we continue there are a couple of things which need explaining."x55" #push the value of EBP on to the stack "x71" #Venetian Padding "x58" #take the value of EBP and pop it into EAX "x71" #Venetian Padding "x05x20x11" #add eax,0x "x71" #Venetian Padding the net sum will add 300 to the value in EAX "x2dx17x11".As per usual we will replace our buffer with the metasploit pattern for analysis.Fortunately we can easy speed pc 7.02 let!mona do some of the heavy lifting filtering out addresses that are unicode compatible.In the end I chose to use the EBP register.
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Ok lets get to the good stuff!41 INC ECX 004100 ADD byte PTR DS:ECX, AL 41 INC ECX 004100 ADD byte PTR DS:ECX,.To demonstrate unicode exploit development we will be creating an exploit from scratch for "Triologic Media Player dys fire and ice wolfpack blogspot 8".Web applications security vulnerabilities summary (PHP, ASP, JSP, CGI, Perl).Perhaps the most notable contributer to unicode exploitation is SkyLined who released an encoder (alpha2) that can generate unicode compatible shellcode, but more about that later.After playing around with the length I was surprised to see that I only needed to add about 770-bytes (in hex this is equivalent to EBP300).
You can see the memory dump of that register below showing its proximity to our buffer.