Win32:Malware-gen is a Trojan and its danger index can ranked as severe. As you know, Win32:Malware-gen is malicious to the whole systems and will silently sneaks into your PC without your permission. And it normally comes with the third party application and will also appear on the attachment of spam emails. In most of time, websites can directly bring it to your PC as well. So when your use your PC, you should be careful all over the process.
How does Win32:Malware-gen gain profits? As you know, everything works for money. And Trojan will not cost its energy just from simply fun. The main resources of its income are by means named blackmail. It will not just detect your information and sale it. It is beyond that. Win32:Malware-gen will make password on the documents without consent. So people also call it as password generator, but it is not a compliment. when you are going to open it, it will remind you that this documents are broken. If it is an important paper, or a business proposals which you have written overnights, you will cost whatever you could do to save them. And then, you lose your money.