The Glupteba botnet has been found to incorporate a previously undocumented Unified Extensible Firmware Interface (UEFI) bootkit feature, adding another layer of sophistication and stealth to the malware. “This bootkit can intervene and control the [operating system] boot process, enabling Glupteba to hide itself and create a stealthy persistence that can be extremely difficult to detect and remove,”

Source: The Hacker News