Two well-documented Chinese backdoors have recently been modified to operate on Linux systems.

The advanced persistent threat (APT) "Gelsemium" is a decade old now, and the new malware tied to the group, Wolfsbane and Firewood, can trace their lineage back to 2005. Throughout its history, Gelsemium has focused on information gathering from Windows systems. Now, it has adjusted its tooling to operate just as effectively in Linux environments.