Employee Monitoring Tools Abused

Four Seconds to Botnet - Analyzing a Self-Propagating SSH Worm with Cryptographically Signed C2 [Guest Diary]
https://isc.sans.edu/diary/Four%20Seconds%20to%20Botnet%20-%20Analyzing%20a%20Self%20Propagating%20SSH%20Worm%20with%20Cryptographically%20Signed%20C2%20%5BGuest%20Diary%5D/32708
OpenSSH Update on MacOS
https://www.openssh.org/releasenotes.html
Employee Monitoring and SimpleHelp Software Abused in Ransomware Operations
https://www.huntress.com/blog/employee-monitoring-simplehelp-abused-in-ransomware-operations