Protect yourself from ransomware
Given the recent world-wide ransomware attacks I'm sure most people are now aware of what ransomware is. The current strain of the "WannaCry" ransomware is only targetting the Windows platform, but even the users of MacOS should follow the same guidelines listed below.
Ransomware
WannaCry is the latest in a line of viruses which, once they are on an infected machine, encrypt user files in a way which is difficult or impossible to remedy. A pop-up screen will inform victims that they can pay a fee (often in Bitcoin) to obtain the encryption key to unlock the machine. Be aware that there's no guarantee that the encryption key will be provided even if you do pay up.
Therefore, if you become infected - it will potentially mean you lose access to all your files permanently.
Ransomware poses a significant threat both because of the damage it can cause and because of the range of ways in which users can become infected. These include:
Emails containing attachments which look innocent but which are in fact executable files containing the malware.
Emails containing links to websites which, once visited, will automatically download the malware onto the machine.
Links within reputable websites (for instance embedded links to videos or adverts) can cause damage if the user does not have an up-to-date version of the plug-in they are using.
Protect yourself from Ransomware
Having up-to-date virus protection is of course essential, but it will not always prevent you from becoming infected. Please consider the following prevention tips as well:
Ensure your Operating System (Windows, MacOS etc) and any other installed software are fully patched and up to date.
Make sure that your internet browser and any plug-ins (e.g. Flash, Java, Silverlight) are up-to-date.
Don’t click on links or open attachments from unknown email addresses. Remember that fraudsters can “spoof” an email address to make it look like one used by someone you trust. If you are unsure, check the email header to identify the true source of any such attachment or link. If in doubt, do not open any attachments.
Beware of links contained within websites – for example adverts or video files on sites which look trustworthy.
Back-up your files to a location not directly linked to your machine or network.
Close unneeded connections on business networks – this will help to prevent the spread of the virus from infected machines.
For more information and up to date guidance from the National Cyber Security Centre see this link.
If you'd like to speak to someone about your IT Security please get in touch.