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Windows 7: Where should you see runDLL32.exe, and how many copies?

02 Feb 2010   #1
Carbonyl

Windows 7 RTM
 
 
Where should you see runDLL32.exe, and how many copies?

Hi everyone. Quick question for you all. Sorry if it's so quick as to be stupid! I'm running Win 7 x64 Professional for this inquiry:

rundll32.exe is a common MicroSoft Windows file that most of us have seen before. Also, it's a commonly impersonated file when it comes to nasties and malware!

Today I saw a process being scanned by NOD that wasn't open or active in either Process Explorer or WinPatrol 2010 - It was C:\Windows\sysWOW64\RunDLL32.exe

Is this a normal location for a rundll32 instance? Why would a 32-bit program be in the sysWOW64 directory? Particularly when there's another copy of it in the system32 directory?

NOD, MBAM, and VirusTotal all come back with negative results, but I'm not sure why this file is where it is.


My System SpecsSystem Spec
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03 Feb 2010   #2
Dinesh

Windows® 8 Pro (64-bit)
 
 

Quote   Quote: Originally Posted by Carbonyl View Post
NOD, MBAM, and VirusTotal all come back with negative results, but I'm not sure why this file is where it is.
3 things cannot go wrong. Let either NOD32 or MBAM remove it.
My System SpecsSystem Spec
03 Feb 2010   #3
Carbonyl

Windows 7 RTM
 
 

Quote   Quote: Originally Posted by Dinesh View Post
Quote   Quote: Originally Posted by Carbonyl View Post
NOD, MBAM, and VirusTotal all come back with negative results, but I'm not sure why this file is where it is.
3 things cannot go wrong. Let either NOD32 or MBAM remove it.
???

When I say all three came back with negative results, I mean all three said the file was clean. Should I still delete it?
My System SpecsSystem Spec
.

03 Feb 2010   #4
Dinesh

Windows® 8 Pro (64-bit)
 
 

Quote   Quote: Originally Posted by Carbonyl View Post
Quote   Quote: Originally Posted by Dinesh View Post
Quote   Quote: Originally Posted by Carbonyl View Post
NOD, MBAM, and VirusTotal all come back with negative results, but I'm not sure why this file is where it is.
3 things cannot go wrong. Let either NOD32 or MBAM remove it.
???

When I say all three came back with negative results, I mean all three said the file was clean. Should I still delete it?
No.
My System SpecsSystem Spec
03 Feb 2010   #5
swarfega

Windows 7 Professional 64-bit
 
 

In task manager click on view menu then select columns. Now tick command line and youl be able to see exactly what run32dll.exe is calling.
My System SpecsSystem Spec
03 Feb 2010   #6
Dwarf

Windows 8.1 Pro RTM x64
 
 

That is perfectly normal. There are 2 copies of rundll32.exe on 64-bit systems. One copy is in the System32 folder and the other is located in the SysWOW64 folder.
My System SpecsSystem Spec
Reply

 Where should you see runDLL32.exe, and how many copies?




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