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All major web browsers have been affected by this malware campaign Microsoft has warned and are at risk of malware infection. Europe and Asia worst hit.

Adrozek has been in circulation since May this this year and was found across more than 30,000 devices per day at its peak spread this summer.

Microsoft has warned about a persistent malware campaign that’s affecting all the major web browsers like Google Chrome, Firefox and even its own Edge. This malware campaign is built to inject fraudulent ads into the search results and siphon off users’ personal information.

According to the notice published by Microsoft, this malware called Adrozek has been in circulation since May this this year and was found across more than 30,000 devices per day at its peak spread this summer.

According to the map shared by Microsoft, Europe and Asia were severely affected by Adrozek over May to September this year. 

“In total, from May to September 2020, we recorded hundreds of thousands of encounters of the Adrozek malware across the globe, with heavy concentration in Europe and in South Asia and Southeast Asia,” Microsoft said. 

This Adrozek malware is capable of modifying web browsers like Chrome, Mozilla and Edge - the three browsers that account for 70% of the browser market share. So pretty much all devices are at risk here, across the world.

Microsoft explained that the Adrozek malware is distributed via 159 malicious domains or more and each of these domains host 17,300 distinct URLs at an average. All these domains house hundreds of thousands of unique malware samples and can bypass security tools that usually filter such threats.