I was reading a malware report (https://www.joesandbox.com/analysis/32668/0/pdf) on the Fiddler Installer "[Sep-15-17] v4.6.20173.38786" and two things grabbed my attention. First SetupHelper is classified as malicious (Eric says (https://groups.google.com/forum/#!topic/httpfiddler/qJk2MRP_AKI) that may be because it's missing the .exe extension) and second the mscorsvw process writes to an unknown file the contents MEOW followed by some indecipherable data.