Back in October 2022, Kaspersky GReAT was looking into a peculiar advertisement on a hacking forum. A cybercriminal had been advertising a UEFI bootkit, dubbed BlackLotus, that could bypass Secure Boot, for $5,000. Given the low price for such powerful capabilities, the cybersecurity community initially took this advertisement with a grain of salt. As no BlackLotus samples were found in the wild, no one could at the time verify the claims made in the forum post.
However, about half a year later, in March 2023, ESET confirmed that the BlackLotus advertisement was genuine. The researchers tracked down samples of this bootkit and confirmed that it can indeed bypass Secure Boot through a vulnerability called Baton Drop (CVE-2022-21894). As this vulnerability was still exploitable in 2023, Microsoft had to release multiple security updates to address it.
Read more…
Source: Kaspersky
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Cobalt Strike Beacon delivered via GitHub and social media
July 30, 2025
n the latter half of 2024, the Russian IT industry, alongside a number of entities in other countries, experienced a notable cyberattack. The attackers employed a range of malicious techniques to trick security systems and remain undetected. To bypass detection, they delivered information about their payload via profiles on both Russian and international social media platforms, ...
- Apple patches multiple vulnerabilities in iOS and iPadOS. Update now!
July 30, 2025
Apple released a security update for iOS and iPadOS to patch multiple vulnerabilities, including one that could leak sensitive information when visiting a malicious website and one that allows an attacker to display false information in the address bar. In total, 29 vulnerabilities were patched, most of them in WebKit, Apple’s web rendering engine that powers ...
- Gunra Ransomware Group Unveils Efficient Linux Variant
July 29, 2025
Gunra ransomware was first observed in April 2025 in a campaign that targeted Windows systems using techniques inspired by the infamous Conti ransomware. Trend Micror monitoring of the ransomware landscape revealed that threat actors behind Gunra have expanded with a Linux variant, signaling a strategic move toward cross-platform targeting. The novel ransomware group has already made ...
- Telecom giant Orange warns of disruption amid ongoing cyberattack
July 29, 2025
Orange, a French telecommunications giant and one of the largest phone providers in the world, announced on Monday that it was the victim of an unspecified cyberattack. In the announcement, the company said that it detected a cyberattack “on one of its information systems” on July 25, and that it proceeded to “isolate potentially affected services ...
- CVE-2025-53770 – Zero-day exploitation in the wild of Microsoft SharePoint servers
July 29, 2025
Microsoft released an advisory for CVE-2025-53770, a critical Remote Code Execution (RCE) vulnerability affecting on-premise SharePoint servers. This vulnerability has been exploited in the wild as a zero-day by an unknown threat actor prior to the disclosure from Microsoft. The vulnerability is described as an unauthenticated deserialization of untrusted data issue, and has a CVSS base ...
- Endgame Gear warns mouse config tool has been infected with malware
July 29, 2025
Gaming kit maker Endgame Gear has confirmed it was the victim of a supply chain attack which saw unidentified threat actors break into its website and replace a legitimate configuration tool with a trojanized version containing malware. In an announcement posted on the company’s website, it said on June 26 2025, someone managed to replace a ...