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Cybersecurity researchers have found “backdoor-like behavior” within Gigabyte systems, which they say enables the UEFI firmware of the devices to drop a Windows executable and retrieve updates in an unsecure format. Firmware security firm Eclypsium said it first detected the anomaly in April 2023. Gigabyte has since acknowledged and addressed the issue. “Most Gigabyte firmware […]
A stealthy Unified Extensible Firmware Interface (UEFI) bootkit called BlackLotus has become the first publicly known malware capable of bypassing Secure Boot defenses, making it a potent threat in the cyber landscape. “This bootkit can run even on fully up-to-date Windows 11 systems with UEFI Secure Boot enabled,” Slovak cybersecurity company ESET said in a […]
A security feature bypass vulnerability has been uncovered in three signed third-party Unified Extensible Firmware Interface (UEFI) boot loaders that allow bypass of the UEFI Secure Boot feature. “These vulnerabilities can be exploited by mounting the EFI System Partition and replacing the existing bootloader with the vulnerable one, or modifying a UEFI variable to load […]
An unknown Chinese-speaking threat actor has been attributed to a new kind of sophisticated Unified Extensible Firmware Interface (UEFI) firmware rootkit called CosmicStrand. “The rootkit is located in the firmware images of Gigabyte or ASUS motherboards, and we noticed that all these images are related to designs using the H81 chipset,” Kaspersky researchers said in […]
Consumer electronics maker Lenovo on Tuesday rolled out fixes to contain three security flaws in its UEFI firmware affecting over 70 product models. “The vulnerabilities can be exploited to achieve arbitrary code execution in the early phases of the platform boot, possibly allowing the attackers to hijack the OS execution flow and disable some important […]
Three high-impact Unified Extensible Firmware Interface (UEFI) security vulnerabilities have been discovered impacting various Lenovo consumer laptop models, enabling malicious actors to deploy and execute firmware implants on the affected devices. Tracked as CVE-2021-3970, CVE-2021-3971, and CVE-2021-3972, the latter two “affect firmware drivers originally meant to be used only during the manufacturing process of Lenovo […]
A previously undocumented firmware implant deployed to maintain stealthy persistence as part of a targeted espionage campaign has been linked to the Chinese-speaking Winnti advanced persistent threat group (APT41). Kaspersky, which codenamed the rootkit MoonBounce, characterized the malware as the “most advanced UEFI firmware implant discovered in the wild to date,” adding “the purpose of […]
Short Bytes: Very often curious Windows users search the phrase “What is Last BIOS Time in my Task Manager?” Well, it’s the time taken by your computer’s UEFI firmware to initialize your hardware before the Windows OS starts booting. By paying a close attention to your PC’s boot-up process, one can tweak some UEFI settings […]