Of course, Tor-M2 at Khmeimim Air Base in Syria. And what does it mean? It means that this system, most likely, is already delivered to Syrians.
To remind about those Tors (namely M2KM), here is what was done to them in 2017. Here is the video, again.
"Rumor" has it that these systems are capable of shooting targets while moving across complex terrain. They are also honed precisely against all kinds of stand-off and stand-offish munitions, from TLAMs to all other kinds of HARMs. Rumor has it that Israeli Air Force's recent foray into Syria was against Iranian Tor which was about to go "on-line".
Here is another Terminatorish (musically) video of TOR-M2KM: