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New ‘Black Lotus’ UEFI Rootkit Gives APT-Stage Capabilities to Cybercriminals

By Ionut Arghire on October 17, 2022

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A risk actor is selling on underground felony boards a vendor-independent UEFI rootkit that may disable safety software program and controls, cybersecurity veteran Scott Scheferman warns.

Dubbed ‘Black Lotus’, the Home windows rootkit is a robust, persistent instrument being supplied on the market at $5,000, with $200 funds per new model and that includes capabilities resembling these employed by state-sponsored risk actors.

Written in Meeting and C, Black Lotus is 80 kilobytes in dimension and options geofencing, to keep away from infecting nations within the CIS area.

In accordance with Scheferman, the risk packs evasion capabilities similar to anti-virtualization, anti-debugging, and code obfuscation, and may disable safety functions and protection mechanisms heading in the right direction machines, together with Hypervisor-protected Code Integrity (HVCI), BitLocker, and Home windows Defender.

By loading code earlier than the booting course of completes, the rootkit can bypass consumer entry management (UAC) and safe boot, it might load unsigned drivers, and may persist undetected within the UEFI firmware of the goal machine, supposedly indefinitely.

Black Lotus, Scheferman says, gives a full set of capabilities to attackers, together with file switch and tasking assist, and may probably turn out to be a significant risk throughout IT and OT environments.

“Contemplating this tradecraft was relegated to APTs just like the Russian GRU and APT 41 (China nexus), and contemplating prior felony discoveries we have made (e.g. Trickbot’s #Trickboot module), this represents a little bit of a ‘leap’ ahead, when it comes to ease of use, scalability, accessibility and most significantly, the potential for way more affect within the types of persistence, evasion and/or destruction,” Scheferman says.

In accordance with Scheferman, Black Lotus supposedly with the ability to goal a broad vary of machine varieties would possibly recommend that its builders are focusing on an undocumented bootloader vulnerability impacting many distributors.

Kaspersky too received wind of Black Lotus, declaring that the rootkit’s superior capabilities had been beforehand typical of nation-state malware, however at the moment are more and more accessible to cybercriminals.

Associated: Chinese language UEFI Rootkit Discovered on Gigabyte and Asus Motherboards

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