In reply to Danilo.

Hi Danilo,
Thats the danger of these kinds of attack, it is so easy to fall for them. If you think that you might have clicked on one, download and install an AV client to scan your machine. The major AV vendors will be detecting these malware.

If you want to prevent users from clicking the links on the first place, install a multi-layered set of filters, include an anti-spam filter to keep the emails away from users' inboxes and a web filter to block any malicious links. Take a look as Cisco ESA device for emails and Cisco CWS or WSA for web filtering.