subset.exe
Malware - Harmful EXE

 subset.exe is not a microsoft windows file/process. It belongs to Adobe Reader Pro. It seems that the illegal installers of Adobe Reader Pro downloadable from torrents etc have been altered. So beware. Recently analyzed virus samples indicate that this installer is doctored to create a backdoor trojan virus, or a worm on the computer on which the installer is run. Some of the threats that it poses are 1) it can affect networks 2) It can launch DOS attacks from the infected computer 3) It can terminate the firewall, antivirus and other security related applications 4) It contacts an IRC server from the infected computer.  You can see the details of the infection on this link

 

Aliases: There are a number of aliases, You can find a list of them on this link

Delete these Files: The place where subset.exe could be found. Delete it if you are confirmed that your computer is indeeed infected by the illegal installer of Adobe reader Pro. If you have installed a genuine version of Adobe Reader Pro, then you have nothing to worry about. 

%System%\subset.exe

   %System% is C:\Windows\System (in Windows 95/98/Me), C:\Winnt\System32 (in Windows NT/2000), or C:\Windows\System32 (in Windows XP and in Vista)

 View Hidden Files: Before you could delete subset.exe, you need to search for it, and before doing that you need to enable to view hidden files and folders  Click here to read more...
 Boot in safe mode: Sometimes you will not be able to delete a file even if you find it, in that case you should boot in safe mode and then try to delete it/ them.  Click here to read more...
 End Process in the Task Manager:  If you find subset.exe running in the Task Manager, you can select it  and press End process button, that will help you to delete it from the hard disk later. Click here to read more... 
 Remove Entry from Windows Startup:  Look in the windows startup, by opening the system configuration utility and remove the entry of subset.exe if found. Click here to read more...
 Unable to Open Task Manager: If that happens, you can try these free tools to enable the task manager again. Click here to read more...
 Run CCleaner :  If you manage to find subset.exe and delete it,  even then there will be associated entries in the windows registry. If you run a free software called CCleaner, that will help you to automatically clean the registry from the virus entries. Click here to read more...

 Delete the registry keys manually: If you are brave enough to do so. You can edit the registry by using the windows built in registry editor. Click here to read more...

You can find the registry entries created by subset.exe on this link

Best of Luck  , and let me know if i could be of any help.

The reference with permission from Threatexpert

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