Cyber crime officers have said that the malicious emails often appear to be genuine communications from a bank.
They come with attachments that appear to be files such as a voicemail, fax, an invoice or details of a suspicious transaction.
If you receive such an email:
- Do not to click on any attachments
- Update your antivirus software and operating systems
- Back up important files
If your computer is infected with malicious software:
- Disconnect it from the network
- Call a professional to clear the machine
- Report it to www.actionfraud.police.uk
More top news
Drinking three to five cups of coffee a day could reduce the risk of clogged arteries and thus heart attacks, a study has found.
There are five million British expats across the globe. Many have a vested interest in May's election and many still have the right to vote.
Abba's Bjorn Ulvaeus has a boyish enthusiasm for the cashless society - and he has a challenge for ITV News viewers.