The malware isn't new at all. It has however been recently modified to extort more money from victims.
Ransomware demands additional payment to delete ‘criminal records’- Don't go clicking on email attachments that are suspect. Especially shipping invoices. If you need your shipping information go to the shippers website and find it.
- Backup, backup, backup! Keep your personal files/folders backed up! Something as simple as using SkyDrive or Google Drive can make all the difference. Just because the malware can be removed is no guarantee that it will not do major damage in the process.
- Keep your AV updated and trust it when it says there is a problem. Curiously killed the cat!