Converting an exe file to vbs and back to exe
It is often useful to be able to convert an exe file to a string which will be able to reproduce the exe file. This can be used in a variety of ways (send by email, from an SQL injection, etc.).
Windows simple backdooring
I remember reading this ages ago, and a couple of weeks ago I decided to give it a try.
I was amazed to see not only that this works, but that it even works on Windows7. Granted you do need some extra steps to make this happen in the later.
MacOSX Sandboxes
MacOSX Snow Leopard implements a sandbox facility.
According to the sandbox manpage:
The sandbox facility allows applications to voluntarily restrict their access to operating system resources. This safety mechanism is intended to limit potential damage in the event that a vulnerability is exploited. It is not a replacement for other operating system access controls.