The sophisticated Mumblehard spamming malware infects thousands of Linux and FreeBSD servers going under the radar for at least five years. ESET have monitored the botnet during the last 7 months by sinkholing one of its C&C servers and observing 8,867 unique IP addresses connected to it, with 3,000 of them joining in the past three weeks. The experts speculated that bad actors exploit vulnerabilities in Joomla and WordPress in order to compromise the server and install the MumbleHard malware.”]
Source: https://securityaffairs.co/wordpress/36490/cyber-crime/linux-freebsd-mumblehard-malware.html