Drivers certified through Microsoft’s Windows Hardware Developer Program were used in cyberattacks, including ransomware incidents.
notified Microsoft of the malicious activity, and the companies revealed the issue in a coordinated disclosure.
Microsoft said that it was notified of the activity in October. However, the coordinated disclosure occurred on 13 December 2022 after Microsoft completed its investigations. “A new attempt at submitting a malicious driver for signing on September 29th, 2022, led to the suspension of the sellers’ accounts in early October.”, kernel-mode hardware drivers are assigned the highest privilege level when loaded in Windows, allowing them to perform various malicious activities, including eliminating security software and deleting protected files.
Mandiant and SentinelOne reported on the discovery of “POORTRY” and “STONESTOP” malware that can terminate antivirus and Endpoint Detection and Response processes.
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