Malicious Android Apps installed remotely on my device
I did some further search and found a similar post talking about the same issue, he didn't have the full answer yet i did it my own way and I guess it's working.

1.Since I'm a root user and my issue is related to apps installed in system directory I used "Root Explorer" went to the root directory then system->apps

2.I sorted the apps by date (to see the newly installed malicious apps)

3.I found the following app list: ("obs.apk", "abc.apk", "SettingProvider.apk", "LiveWallpaper.apk", "BatteryControl.apk") which all were installed the same date I installed that malicious app.

4.Finally I did remove them and I think it's over now.