Who are gangs that kidnap and kill in Syria?

I am watching Romanian television B1. A woman refugee says that suddenly gangs have started to kidnap and kill people.
The kidnaping is done for money, so it could be that the terrorists are financing in that way their attacks.
Also a sniper shot at her bus driver when she returned in Syria, also a motorcycle followed them taking pictures and filming.
Very unlikely that the government wants to make the situation instable.