[Chronic]

The last time I had something like this a few weeks ago it was like described here. It just kept self replicating. Did you try combofix? That is what fixed it for me.
http://www.bleepingcomputer.com/combofix/how-to-use-combofix

[library user]

Also, if anyone has problems getting Malwarebytes to download and run, there's a relatively new tool called "Randmbam" which randomly renames the file during download, so the chances of getting it to run increase ten-fold. It's right here, if you want to try it out.

RANDMBAM.

As for Combofix (CF), it may or may not totally remove the infection. When CF produces a log post-run, a lot of times there's additional rogue DLL, DAT, EXE, etc. files to remove, in addition to rogue drivers/services, which may have been missed on the first run.

The only way to get rid of those is to write a custom script in Notepad and then drag the Notepad file into the CF icon on your desktop, so CF can proceed with the custom fix.

[mountainlion]

The last time I had something like this a few weeks ago it was like described here. It just kept self replicating. Did you try combofix? That is what fixed it for me.
http://www.bleepingcomputer.com/combofix/how-to-use-combofix

I ran MRT and AVG at the same time and AVG removed my trojan/peraonal antivirus virus fist because it ran faster. It came up on mrt but mrt could not remove it because I had already removed it with AVG.