![]() In compromised systems, you will most likely see one or multiple Rundll32.exe processes running rogue malware DLL files, probably launched as startup entries. Be aware of what a Rundll32.exe process is executing, by inspecting the Task Manager.If the file Rundll32.exe the file name is found in any other location outside the Windows directory, it could be a virus.You should be suspicious about the following things on your system: To view the list of modules that are being used by each instance of rundll32.exe, open a Command Prompt window and run this command: tasklist /m /fi "IMAGENAME eq rundll32.exe" ProcessId=10580 List of modules used by RunDll32.exe process Sample Output Caption=rundll32.exeĬommandLine="C:\WINDOWS\system32\rundll32.exe" C:\WINDOWS\system32\shell32.dll,Control_RunDLL C:\WINDOWS\System32\srchadmin.dll ,ĬommandLine="C:\WINDOWS\system32\rundll32.exe" Shell32.dll,Control_RunDLL "C:\WINDOWS\system32\timedate.cpl" To view processes running under administrator token, run the above command from admin Command Prompt. To view the list of rundll32.exe processes along with the command-line and Process ID, run this command in a Command Prompt window: WMIC PROCESS WHERE Name="rundll32.exe" get Caption,Commandline,Processid /format:list Some users have indicated that it’s related to Groove Music in Windows 10. ![]() You may see an entry like below, without a DLL file name in the arguments. Note: The Task Manager, with its default settings, shows only the process names, their ID and other stuff, but but not the full command-line arguments of each process. You can see the full command-line of each Rundll32.exe process using Task Manager. You can configure Task Manager to show Command-line and Image Path name columns in the Processes as well as the Details view. The full command-line to open Sound applet is: rundll32.exe C:\WINDOWS\System32\shell32.dll,Control_RunDLL C:\WINDOWS\System32\mmsys.cplįor Time and Date Control Panel applet, here is the rundll32.exe command-line used: rundll32.exe Shell32.dll,Control_RunDLL "C:\WINDOWS\system32\timedate.cpl" How to know which file the Rundll32.exe process is running? Likewise, there may be other applets running, which uses rundll32.exe.Īnother example would be the Sound applet in the Control Panel. When you open Indexing Options classic Control Panel applet, Windows actually runs this command behind the hood: rundll32.exe C:\WINDOWS\system32\shell32.dll,Control_RunDLL C:\WINDOWS\System32\srchadmin.dll Let’s say you open a Control Panel applet – e.g., Indexing Options. The command line syntax for Rundll32 is as follows: rundll32.exe, Why do multiple rundll32.exe entries show up in Task Manager?Įach rundll32.exe entry you see in Task Manager may be running a different program (DLL). To execute the DLL that specifies an entry-point, rundll32.exe is used. A DLL can optionally specify an entry-point function. Rundll32.exe is a system file which executes a DLL. It’s not a virus!īut, if you have the file located in any folder outside your Windows\System32 directory, then it may be a fake file or could even be malware. Rundll32.exe, the one located in the Windows\System32 folder is a legitimate Windows system file.
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