Drovorub (Russian: дроворуб, "woodcutter") is a software toolkit for developing malware for the Linux operating system. It was created by the 85th Main Special Service Center, a unit of the Russian GRU often referred to as APT28.^[1][2]

Drovorub has a sophisticated modular architecture,^[3] containing an implant coupled with a kernel module rootkit, a file transfer and port forwarding tool, and a command and control server.^[2] Drovorub has been described as a "Swiss-army knife for hacking Linux".^[4]

The U.S. government report that first identified Drovorub recommends the use of UEFI Secure Boot and Linux's native kernel module signing facility to resist Drovorub attacks.^[5]