I was just prompted a DivX update. I have no idea if I have ever seen a movie that demanded the plugin, but I faithfully let it run. After running, I noticed some strange outgoing connection attempts (using Little Snitch) to something related to backup. I got curious and found that the installer had an “optional install tab” that I had not noticed. When the installer finished a program called Zipcloud started and I knew something was fishy: I quit it, deleted the program - and found and threw out two entries in ~/Library/LaunchAgents, that would have it running again and again.

Not with me, DivX. I also ditched all DivX-stuff at the same go: Your plugin is not valuable enough for me to let you mess up my computer.