You installed the "CinemaPro" trojan. Take the steps below to disable it.
Malware is always changing to get around the defenses against it. This procedure works as of now, as far as I know. It may not work in the future. Anyone finding this comment a few days or more after it was posted should look for a more recent discussion, or start a new one.
Back up all data before continuing.
1. Triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:
~/Library/LaunchAgents
In the Finder, select
Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return. A folder named "LaunchAgents" will open.
2. Inside the folder you just opened, there may be files with any of the following names:
com.cinemapro1-2.agent.plist
com.extensions.updater*.agent.plist
UpdateDownloader
Here * stands for a variable five-digit number. Some of these files may be absent. Move any that you have to the Trash and close the Finder window.
If there are any other files in the LaunchAgents folder with a name beginning either in "com.cinemapro" or "com.extensions.updater", move them to the Trash as well.
Log out or restart the computer. The trojan will now be inactive, but there are a few more components of it that should be cleaned up.
3. Do as in Step 1 with this line:
~/Library
A folder named "Library" will open. Inside it there may be a subfolder with this name:
cinemapro1-2
If so, move that subfolder—not the Library folder—to the Trash.
4. Finally, open this folder in the same way as above:
~/Applications
This is not the usual Applications folder, but a different one inside your home folder. Look for an application with this name:
cinemapro1-2
and move it to the Trash, if present. Finally, empty the Trash.