Dont wait for you to get infected with any other viruses or malwares on your pc.All things would depend on how you do prevent it on the first place.
Dont click any links or download without knowing its source.

How to detect it? Usually your AV would able to detect such thing but we know that there were viruses/malwares which cant be detected.
Take that advise given by Omega above when it comes on network activity and processes yet you would able to detect it out if something is suspicious.