I wrote shellcode that calls ExitProcess for my TaskManager.xls spreadsheet.
Now I’ve added the asm files (sc-ep.asm for 32-bit and sc-64-ep.asm for 64-bit) for this shellcode to my library.
Remark that the 32-bit version assembler code, that was generated with my simple shellcode generator, has a ret instruction after the call to ExitProcess. This instruction will never be executed, as a call to ExitProcess does not return.
You can find this shellcode on my shellcode page.
Didier Stevens 