Fake KMPlayer installs malware?
I read that there is a fake KM Player doing the rounds at different websites, which when installed installs some Malware
source: Best Free Media Player
A quick google search gave me a couple of links
KMPlayer forum: malware in KMP build 1440 (fake?) - The KMPlayer's Forums
Malwarebytes forum: malware in fake KMplayer from download sites - Malwarebytes Forum
I would recommend KMPlayer users to upload the setup files to virustotal or virscan or jotti's malware scanner to make sure if it is safe.
If you already have KMPlayer on your PC, run a scan with your Anti-virus or Malwarebytes (though I doubt this would help, since Mbam haven't updated their forum thread)