“sbd-1.36” is a Netcat-clone, designed to be portable and offer strong encryption. It runs on Unix-like operating systems and on Microsoft Win32. It features AES-128-CBC + HMAC-SHA1 encryption (by Christophe Devine), program execution (-e option), choosing source port, choosing port, continuous reconnection with delay, and some other nice features. Only TCP/IP communication is supported. Gaining access to victim (from Linux box) using LaunchDaemons.
Source: https://thehackernews.com/2012/04/permanent-reverse-tcp-backdoor-for.html