A dozen copies of this appeared in my mailbox.
Date: Mon, 18 Sep 2017 09:34:09
From: Phyllis Luty <email@example.com>
Could you please let me know the status of the attached invoice? I
appreciate your help!
It was sent to me four hours ago, and there's been a steady tricle of the same thing ever since. So I scanned it.
As usual, most products failed to flag it. Nine products weren't able to scan any file compressed with 7z compression. Notice how the products that succeeded are different for each malware I show to Virustotal.
If you're relying on an antivirus scanner to protect you, then you're using a chocolate teapot.