8xaXyM1r.exe is for sure a threat and if it is in task manager you can end it. No doubt about it. Any group of random numbers and/or letters is considered a threat.
here is my suggestion:
Disable your security software before running rkill
>http://www.bleepingcomputer.com/forums/topic114351.html
Use rkill
RKill – What it does and What it Doesn’t – A brief introduction to the program
http://www.bleepingcomputer.com/forums/topic308364.html
Now read this tutorial on Malwarebytes real good so you know what to do
Malwarebytes’ Tutorial
>http://www.bleepingcomputer.com/virus-removal/how-to-use-malwarebytes-anti-malware-tutorial#intro
>http://www.bleepingcomputer.com/virus-removal/how-to-use-malwarebytes-anti-malware-tutorial#tutorial
>http://www.bleepingcomputer.com/virus-removal/how-to-use-malwarebytes-anti-malware-tutorial#troubleshoot
SUPERAntiSpyware
http://www.superantispyware.com/
SUPERAntiSpyware Tutorial
>http://www.bleepingcomputer.com/virus-removal/how-to-use-superantispyware-tutorial#intro
>http://www.bleepingcomputer.com/virus-removal/how-to-use-superantispyware-tutorial#tutorial
>http://www.bleepingcomputer.com/virus-removal/how-to-use-superantispyware-tutorial#troubleshoot