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rundll32.exe


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What is it?
Run a DLL as an App - rundll32.exe

What does it do?
Direct Quote from MS: (Source)
Microsoft Windows 95, Windows 98, and Windows Millennium Edition (Me) contains two command-line utility programs named Rundll.exe and Rundll32.exe that allow you to invoke a function exported from a DLL, either 16-bit or 32-bit. However, Rundll and Rundll32 programs do not allow you to call any exported function from any DLL. For example, you can not use these utility programs to call the Win32 API (Application Programming Interface) calls exported from the system DLLs. The programs only allow you to call functions from a DLL that are explicitly written to be called by them. This article provides more details on the use of Rundll and Rundll32 programs under the Windows operating systems listed above.

More Info
More Info

Virus Precaution:
The original file from Microsoft gets placed in the Located at C:WINDOWSSystem32 undll32.exe . If you find it anywhere else then you should be suspicious for sure.

You'll want to keep an eye on this google search for any known viruses.

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W32.Miroot.Worm @ Symantec
Backdoor.Lastdoor @ Symantec
Trojan.StartPage @ Symantec


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rundll32.exe is a Windows System File and should be in a system directory. If it is then this application is safe.

Startup DB Entries:
[Ljx]"Added by the LINEAG-ABD TROJAN! Note - this is not the legitimate rundll32.exe processb
[Loadhg]"Added by the LINEAG-ABX TROJAN!" b
[loadMecq3]"Added by the LEGMIR-AS TROJAN! Note - this is not the legitimate rundll32.exe processb
[loadMefs]"Added by the LEGMIR-JB TROJAN! Note - this is not the legitimate rundll32.exe processb
[LTT2]"Added by the LINEAGE-BI TROJAN!" b
[Microsoft (R) Windows DLL Loader]"Added by the RANKY.W TROJAN! Note - this is not the legitimate rundll32.exe processb
[Regrx]"Added by the WAYIC-A TROJAN! Note - this is not the legitimate rundll32.exe processb
[Rhg]"Added by the LINEAG-BIT TROJAN! Note - this is not the legitimate rundll32.exe processb
[RKrx]"Added by the LINEAG-ADA TROJAN! Note - this is not the legitimate rundll32.exe processb
[Rr2]"Added by the LINEAG-ADI TROJAN! Note - this is not the legitimate rundll32.exe processb
[rro]"Added by the LINEAG-AAE TROJAN! Note - this is not the legitimate rundll32.exe processb
[Rundll32]"Added by a variant of the DVLDR TROJAN! Note - this is not the legitimate rundll32.exe processb
[rx]"Added by the LINEAGE-BP TROJAN! Note - this is not the legitimate rundll32.exe processb
[rzt]"Added by the LINEAGE.BDP TROJAN! Note - this is not the legitimate rundll32.exe processb
[SysWy]"Added by the LINEAGE-JH TROJAN! Note - this is not the legitimate rundll32.exe processb
[TaskMan]"Added by the DVLDR TROJAN! Note - this is not the legitimate rundll32.exe processb
[Tray]"Added by the LINEAG-ADR TROJAN! Note - this is not the legitimate rundll32.exe processb
[UPDATEHOOK]"??" ?
[Win32 Rundll Loader]"Added by the SDBOT.A TROJAN! Note - this is not to be confused with the legitimate rundll32.exe file!" b
[zt]"Added by the LINEAG-ABA TROJAN! Note - this is not the legitimate rundll32.exe processb

Service DB Entries:
rundll32 (rundll32) Added by the Troj/Feutel-Q TROJAN!
Windows DLL Loader (RunDll32) Added by the Troj/Agent-MD TROJAN! Note: This is not the legitimate Windows Process. (Which is found

Disclaimer

Every attempt has been made to ensure the information about rundll32.exe is accurate but alot of malware applications try to pose as valid applications. If it is something other than what was posted above please leave some feedback in the forum.
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User Comments
Josuei deleted rundll32.exe and now i can't scan my computer how can i get it back?
ZaheerRUNDII32.EXE you Mean Its Also A Windows File .?
OmiYa, I deleted it from my computer and now i cant run internet explorer, ajust my date and time, or scan my computer. I need it back.!!¡¡
Melmy rundll32.exe was deleted also, and now i'm having problems opening all the things previously listed above.. what do i do?
mikemy rundll32.exe was deleted also, what to do now?
labeyany one help me ....... how can i fix that rundll32.exe........
nameI was having many problems with the error message, "Cant find rundll.32.exe. I replaced the file and many of the problems are gone, but the error message appears when I try some control pannel functions. How can I have my computer find rundll32.exe?
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lsass.exe | csrss.exe | alg.exe | dwwin.exe | Svchost.exe | Spoolsv.exe | wowexec.exe | cidaemon.exe | wmiprvse.exe | ctfmon.exe | Winlogon.exe | wuauclt.exe | Smss.exe | msmsgs.exe | rundll32.exe | mdm.exe | ntvdm.exe | wscntfy.exe | explorer.exe | ntdll.dll | iexplore.exe | msdxm.ocx | wisptis.exe | wdfmgr.exe | MsiExec.exe | PDVDServ.exe | DLLhost.exe | gcasdtserv.exe | shdoclc.dll | Winmgmt.exe | cisvc.exe | oleaut32.dll | taskmgr.exe | inetinfo.exe | Shell32.dll | mspmspsv.exe | internat.exe | hal.dll | comctl32.dll | mstask.exe |