You can run your system in two ways. One is trusting everything until there is evidence it is malicious. The evidence needs to be provided by, for example, your antivirus solution. This is a method of the past that could hardly keep up with the over 390,000 daily newly generated malware. The other is you trust only known software/executables/scripts.
But have you ever tried to whitelist all executables of your image with software restriction policies or AppLocker? First you need to inventory all executables and then create a policy based on a digital certificate, hash, or path. There are a huge number of executables. And not all are digitally signed. So you need to fall back to filenames and hashes. But what if you use an application that creates unsigned randomly named executables in your temporary folder during runtime? You have to punch a huge security hole into...
