Before companies like Microsoft and Apple release new software, the code is reviewed and tested to ensure it works as planned and to find any bugs. Hackers and cybercrooks do the same. The last thing you want if you’re a cyberthug is for your banking Trojan to crash a victim’s system and be exposed. More importantly, you don’t want your victim’s antivirus engine to detect the malicious tool. So how do you maintain your stealth? You submit your code to Google’s VirusTotal site and let it do the testing for you. It’s long been suspected that hackers and nation-state spies are using Google’s antivirus site to test their tools before unleashing them on victims. Now Brandon Dixon, an independent security researcher, has caught them in the act.