Hi, do you refer to this EXE stealth at hxxp://www.webtoolmaster.com/downloadd.htm?
If so, the test result is negative. My app encrypted with that software couldn't run on Windows Server 2003 (on WinXP it's OK), though I'm not sure all app are affected or not.

BTW this "EXE stealth" is VERY alike to the cryptor that is called yoda's cryptor which is open source, though EXE stealth has more anti-debugger options. Is it rip?

Even UPXed executables doesn't run on Win 2K3. (UPX has another problem with VC++ 7.1 generated PE, thus useless for VS.NET 2003 users anyway)

I doubt this is the new and simple form of security protection implemented in Win2K3, for some of those virii are encrypted with those packers. Win2k3 is fairly good OS, faster than WinXP or Linux, more stable than XP, and like, but this issue about packed executable is kinda problem.

Does anyone hack the scheme of PE check in Win2k3? I myself is not so good at reversing. I could run only ASpack-ed executable so far on Win2K3, what's the difference?