Adrozek is malware that injects fake ads into online search results.
But during the December 2020 announcement, Microsoft claimed "hundreds of thousands" of infected devices worldwide between May and September 2020.
[1] For each user tricked into clicking on the fake ads, the scammers earn affiliate advertising dollars.
[6] The malware has been observed to extract device data and, in some cases, steal credentials, sending them to remote servers.
[4] According to PC Magazine, a good way to avoid, or mitigate, infection by Adrozek is to keep browser and related software programs up to date.