If you’ve recently received an email recommending that you upgrade to Windows 12, you probably had enough spidey-sense to delete it. You should realize this is a fake or a come-on for some piece of malware that was about to infect your computer. But what about if you got a message asking you to upgrade to Windows 11? Security researchers have tracked a malicious campaign that made use of a legitimate-sounding “windows-upgraded” domain (don’t worry, it has been neutralized since) which was used to spread RedLine Stealer malware by running a fake installer.

In my blog post for Avast, I describe the scam and ways you can check to make sure you are downloading the legit Win11 upgrade package.