I am sure many people will thank you for this heads up?IP leads a trail to you and provider. Law enforcement can trace the call to the provider. They can ask who own this IP. On another note to your first question the answer is yes. It would require a virus, maybe malicious mostly. It would require some kind of remote access i think.
One note though. If its a computer from the corporation your a lot better off not using for illegal activity. Its a trail to you when taking it back to work. They will know. not saying it was. im saying IF....