Malware that is spread through security warnings or advertisement for antivirus software is known as?

Malware spread through security warnings prompting you to download something is usually referred to as 'scareware', but malware masquerading as a legitimate software such as antivirus software would be a Trojan, which is short for Trojan horse and named for the way it infiltrates your computer under the guise of 'safe' software.

I'm really not sure but but i think a