Patch Tuesday

Once again it’s patch Tuesday. Make sure you patch your systems, to maximise their resilience to malicious code. Check out Microsoft Security Bulletins and Advisories for more information.

Also, don’t forget that today Microsoft ends support for Windows XP SP1. So if you haven’t already done so, make sure you upgrade to SP2 at

Patch Tuesday

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MoonBounce: the dark side of UEFI firmware

At the end of 2021, we inspected UEFI firmware that was tampered with to embed a malicious code we dub MoonBounce. In this report we describe how the MoonBounce implant works and how it is connected to APT41.

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