FTP: "MKD ." Command
This signature detects "MKD." FTP commands sent to FTP/21. Attackers can be attempting to create a hidden directory to install or access a warez server on the system.
References
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3