This leak means sysadmins should take steps, or review their security policies and defenses, to ensure code recently signed by the rogue cert is detected and blocked as it is most likely going to be malicious.
This can be done through Windows configuration, network filtering rules, or whatever you use to police your organization.
The leaked Nvidia certificate is just such a creature, having expired in 2014.
Code signed with this cert will, in the right conditions, be accepted by Windows even though the certificate has expired.
Another Nvidia cert was leaked though expired after the cut-off date.
The crooks who compromised Nvidia’s internal systems to steal and leak the certificate – among many other files, including credentials, secret source code, and documentation – call themselves Lapsus$, and are seemingly trying to blackmail Nvidia into removing cryptomining limit from its GPU firmware.
Last year, for its RTX 30-series graphics cards, Nvidia introduced a technology into their drivers called Lite Hash Rate, or LHR for short.
LHR cripples cryptocurrency mining. By nerfing the cards’ cryptomining performance, Nvidia hoped to make its graphical processing units less attractive to miners, leaving more hardware available to gamers, in theory, and others who actually want graphics performance rather than pure hash rates.
Lapsus$, according to the group’s Telegram page, are threatening Nvidia with the public release of more internal materials and details of chip blueprints unless the company promises to remove LHR. It seems wholly implausible that Nvidia would give in to such blackmail.
The gang also wants Nvidia to open-source its drivers for Macs, Linux, and Windows PCs.
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