Windows 0-day was exploited by North Korea to install advanced rootkit
Briefly

The vulnerability allowed attackers to bypass normal security restrictions and access sensitive system areas that most users and administrators can't reach.
This type of attack is both sophisticated and resourceful, potentially costing several hundred thousand dollars on the black market.
The attackers aimed to target individuals in sensitive fields, such as cryptocurrency engineering or aerospace, to gain access to their employer's networks and steal cryptocurrencies.
Hackers exploited the zero-day vulnerability for installing stealthy malware known as FudModule, allowing them extensive access within the Windows kernel.
Read at Ars Technica
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