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,” Palo Alto Networks Unit 42 researchers Lior Rochberger and Dan Yashnik said in a Monday analysis.
Glupteba is a fully-featured information stealer and backdoor capable of facilitating illicit cryptocurrency mining and deploying proxy components on infected hosts. It’s also known to leverage the Bitcoin blockchain as a backup command-and-control (C2) system, making it resilient to takedown efforts.
Some of the other functions allow it to deliver additional payloads, siphon credentials, and credit card data, perform ad fraud, and even exploit routers to gain credentials and remote administrative access.