I guess everyone here knows those commercially available stealth PC monitoring software.
I'm surprised that those trojans are hardly detected by virus scanners.
All surveillance makers recommend in their FAQs one should add their program to the virus scanner's exception list. After some quick tests in various virtual machines, I was surprised that this is not necessary in most cases. Even the Avast pre-boot scan didn't find the virus.
11 / 60 virus total's scanners recognized the trojan. It was a free, public trial version! No modifications! All 11 hits were "generic". One of those malware programmers offers all surveillance methods you can think of, but not keylogger. To avoid Antivirus detection.
What's the easiest way to find these malware?
Malwarebytes, for example, says they had proprietary methods that were better than the other scanners, but at least in the affected, running Windows, they didn't find more of those viruses.