MoonBounce: the dark side of UEFI firmware

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Level 16
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May 4, 2019
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At the end of 2021, we were made aware of a UEFI firmware-level compromise through logs from our Firmware Scanner, which has been integrated into Kaspersky products since the beginning of 2019. Further analysis has shown that a single component within the inspected firmware's image It was modified by attackers in a way that allowed them to intercept the original execution flow of the machine's boot sequence and introduce an advanced infection chain.

By examining the components of the rogue firmware and other malicious artefacts from the target's network, we were able to reach the following conclusions:
 

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