إقتباس :Scan of the Month 33: Anti Reverse Engineering Uncovered
By Nicolas Brulez


Rather than doing another complete analysis of the binary, i will rather present the techniques i have used in the challenge, and how i have implemented them. The Scan of the Month 33 was released by the Honeynet Project in November 2004. I invite everyone to read the excellent submissions we received this month once they have read my paper. I am presenting the binary from the protection author point of view, while they presented it from the analyst point of view. You will learn the methods and techniques used to Protect / Unprotect a binary with this month's challenge. A lot of weaknesses were left on purpose in this binary and they will be presented here.
Contents
The Challenge 
Identify and explain any techniques in the binary that protect it from being analyzed or reverse engineered 
Something uncommon has been used to protect the code from beeing reverse engineered, can you identificate what it is and how it works? 
Provide a mean to "quickly" analyse this uncommon feature 
Which tools are the most suited for analysing such binaries, and why? 
Identify the purpose (fictitious or not) of the binary 
What is the binary waiting from the user? Please detail how you found it 
Bonus Question - What techniques or methods can you think of that would make the binary harder to reverse engineer? 
Conclusion 
Acknowledgement 
About the Author

http://www.honeynet.org/scans/scan33/nico/