![spam with a .7z file extension spam with a .7z file extension](https://sensorstechforum.com/wp-content/uploads/2016/03/ransomware-files-sensorstechforum.jpg)
![spam with a .7z file extension spam with a .7z file extension](http://www.canadiangay.org/CGStuff/yahspam3.jpg)
![spam with a .7z file extension spam with a .7z file extension](https://www.vinransomware.com/images/news/19-09-17/spam-email.jpg)
Here are the two commands, which you can enter in powershell (and add extensions as you see fit) in the following order… To fix this, we are going to need a second rule, and I will shortly post that here in a Powershell command as well! I promise to be back in 48 hours or so…. So, that explains why the SCR gets past the scanner.
#Spam with a .7z file extension archive
Self-extracting archive file created with the WinRAR archiverģ2-bit Windows executable file with dynamic link library extensionĬompiled source code file or 3D object file or sequence fileĮuropean Institute for Computer Antivirus Research standard anti-virus test file I then checked and found that the Office 365 filtering only blocks the following executables, and checks more than just the extension (it checks to see that it is, in fact, an executable).īelow is a list of the extensions that the Office 365 Scanner (as of today) detects with my original command in this post below.
#Spam with a .7z file extension zip
The only sure method we got working correctly was to use Powershell to connect to the tenant and then to run the following command:Īfter about 15 minutes, this worked without fail, including messages that had ZIP attachments with executable content within.Īfter more testing, I noticed that some executable attachments, including SCR files, in ZIP’s were still getting through even with the below instructions. I opened a case with Microsoft, and we worked through the problem. In one case a client literally had all their mail blocked when using one method, attachment or not!īoth ended up with all sorts of strangeness, including not working at all and also blocking EVERYTHING for some customers! Not cool at all. This is something of a vital requirement nowadays with the likes of Cryptolocker, and ZIP attachments with SCR scripts and the like.īottom line of our problem is that two articles on the web that descibe how this SHOULD work, do not seem to work. We were both working on a problem we were having where transport rules in Microsoft Office 365 were not correctly blocking executable attachments within emails to our clients. Today, I was working with a nice PSS chap in Microsoft (Hi there Om Prakash Nath!)