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

Carbonyl

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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.
 

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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.
 

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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 Computer My Computer

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Windows 7 RTMi7 9206 GB PatrioteVGA GeForce 275 GTX
Computer Manufacturer/Model Number
Custom
OS
Windows 7 RTM
CPU
i7 920
Motherboard
eVGA x58 SLi
Memory
6 GB Patriot
Graphics Card(s)
eVGA GeForce 275 GTX
Sound Card
Soundblaster X-Fi Gamer
Monitor(s) Displays
Acer 225Tw
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WD 1 TB
PSU
Corsair 750 W
Case
Antec Twelve Hundred
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Stock

My Computer My Computer

At a glance

Windows® 8 Pro (64-bit)Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB...6GB DDR3 System Memory at 1,333MHz (on BD 4GB...AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic)
Computer Manufacturer/Model Number
Samsung NP530U4B-S02IN
OS
Windows® 8 Pro (64-bit)
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Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB L3 Cache)
Motherboard
Samsung Electronics
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6GB DDR3 System Memory at 1,333MHz (on BD 4GB + 2GB x 1)
Graphics Card(s)
AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic)
Sound Card
Realtek High Definition Audio
Monitor(s) Displays
35.56cm (14.0) SuperBright 300nit HD LED Display
Screen Resolution
1366x768
Hard Drives
1TB S-ATA II Hard Drive (5400RPM) with ExpressCache 16GB SSD
Internet Speed
sucks
Antivirus
Microsoft Security Essentials
Browser
Google Chrome (Sync enabled)
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.
 

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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.
 

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