This is an old scam but has been updated to be more dangerous so remind your users to be on the lookout. The old version ‘just’ installed a keylogger but this new version installs ransomware on your system.
You receive an email message from ‘Voicemail Service’ with subject like ‘New voice message from <some number>. There’s a bit of standardized-looking text in the body of the message which tells you that ‘you might want to check it when you get a chance.’
There’s a compressed attachment which if you click on it will play an audio file with embedded code that will encrypt files to [original file name].crypted.
Send a reminder to all your users: Do not click on links in “voice mail” emails from someone you do not know, and certainly do not open any attachments!
And if you have an IT department, in addition to good firewall and endpoint security management, make sure they are stripping compressed attachments from all incoming email messages from whatever email vendor you use.
Everyone stay safe out there!