Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.3.9600.16384 (winblue_rtm.130821-1623) 1.01%
6.3.9600.16384 (winblue_rtm.130821-1623) 0.50%
6.2.9200.16384 (win8_rtm.120725-1247) 0.75%
6.2.9200.16384 (win8_rtm.120725-1247) 3.52%
6.1.7600.16385 (win7_rtm.090713-1255) 31.91%
6.1.7600.16385 (win7_rtm.090713-1255) 45.48%
6.1.7600.16385 (win7_rtm.090713-1255) 0.25%
6.0.6000.16386 (vista_rtm.061101-2205) 10.80%
6.0.6000.16386 (vista_rtm.061101-2205) 5.53%
5.1.2600.5512 (xpsp.080413-2105) 0.25%

Relationships


PE structurePE file structure

Show functions
Import table
api-ms-win-core-path-l1-1-0.dll
PathCchAppend
imagehlp.dll
ImageDirectoryEntryToData
kernel32.dll
ExitProcess, GetCommandLineW, EncodePointer, GetNativeSystemInfo, SetFilePointer, SetErrorMode, FreeLibrary, CreateProcessW, LoadLibraryExW, GetCurrentProcess, SetProcessDEPPolicy, WaitForSingleObject, SetEvent, ReleaseSRWLockExclusive, AcquireSRWLockExclusive, GetSystemDirectoryW, WideCharToMultiByte, FormatMessageW, ReadFile, CreateFileW, ReleaseSRWLockShared, Wow64EnableWow64FsRedirection, GetLastError, GetProcAddress, LocalAlloc, IsWow64Process, CreateEventW, DecodePointer, HeapSetInformation, AcquireSRWLockShared, GetCurrentThreadId, CloseHandle, LocalFree, SetUnhandledExceptionFilter, GetStartupInfoW, InterlockedCompareExchange, InterlockedExchange, Sleep, QueryPerformanceCounter, GetCurrentProcessId, GetModuleHandleA, GetSystemTimeAsFileTime, GetTickCount, UnhandledExceptionFilter, TerminateProcess, QueryActCtxW, SearchPathW, SetSearchPathMode, GetModuleHandleW, CreateActCtxW, ActivateActCtx, ResolveDelayLoadedAPI, DelayLoadFailureHook, ReleaseActCtx, GetFileAttributesW, DeactivateActCtx, CompareStringW, lstrlenA, lstrlenW, LoadLibraryW, LoadLibraryA, LoadLibraryExA
msvcrt.dll
DllMain
ntdll.dll
NtOpenProcessToken, NtQueryInformationToken, NtSetInformationToken, NtClose, RtlNtStatusToDosError, RtlImageNtHeader, NtSetInformationProcess
shlwapi.dll
PathIsRelativeW, SHSetThreadRef
user32.dll
CreateWindowExW, SetWindowLongW, GetClassNameW, SetClassLongW, RegisterClassW, LoadIconW, GetClassLongW, DestroyWindow, GetMessageW, DefWindowProcW, GetWindow, CharNextW, GetWindowLongW, LoadCursorW, TranslateMessage, LoadStringW, PostThreadMessageW, MessageBoxW, DispatchMessageW

rundll32.exe

Windows host process (Rundll32) by Microsoft

Remove rundll32.exe
Version:   5.1.2600.5512 (xpsp.080413-2105)
MD5:   f6b34cd47caf6d68106b9f8055f35c50
SHA1:   b20d4ccb44bbb2b1de1e8d61d4152b9553571841
SHA256:   aeb641391d0186c2a6c2ed97fe87edf6d0289818fd2cbb98aad0cda3504b23b0
This is a Windows system installed file with Windows File Protection (WFP) enabled.

Overview

rundll32.exe executes as a process with the local user's privileges. It is set to be run when the PC boots and the user logs into Windows (added to the Run registry key for the current user). It configures an autoplay handler withing explorer.exe named MSPhotoAcqHWEventHandler that will launch the program automatically. This version is installed on Windows XP.

DetailsDetails

File name:rundll32.exe
Publisher:Microsoft Corporation
Product name:Windows host process (Rundll32)
Description:Microsoft® Windows® Operating System
Typical file path:C:\Windows\System32\rundll32.exe
Original name:RUNDLL32.EXE.MUI
File version:5.1.2600.5512 (xpsp.080413-2105)
Product version:5.1.2600.5512
Size:33 KB (33,792 bytes)
Digital DNA
PE subsystem:Windows GUI
Entropy:6.056689
File packed:No
Code language:Microsoft Visual C++
.NET CLR:No
More details

BehaviorsBehaviors

Autoplay handlers
Runs under the registry key 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers\Handlers'
  • Handler name 'WinampMTPHandler'
  • Handler name 'PStarterVideoFilesArrival'
  • Handler name 'PStarterPicturesArrival'
  • Handler name 'PStarterMusicFilesArrival'
  • Handler name 'PStarterMixedCDArrival'
  • Handler name 'PStarterDVDBurningOnArrival'
  • Handler name 'PStarterBlankCDArrival'
  • Handler name 'Power2GoPlayCDAudioOnArrival'
  • Handler name 'PDirDVArrival'
  • Handler name 'P2GDVDBurningOnArrival'
  • Handler name 'P2GCDBurningOnArrival'
  • Handler name 'muveeVideoOnArrival'
  • Handler name 'muveeVideoCameraArrivalCaptureWizard'
  • Handler name 'MSShowPicturesOnArrival'
  • Handler name 'MSSHAudioDevHandler'
  • Handler name 'MSRipCDAudioOnArrival'
  • Handler name 'MediaCapture9VideoCamera'
  • Handler name 'MSSdRunBackup'
  • Handler name 'MSSdConfigBackup'
  • Handler name 'MSPromptEachTimeNoContent'
  • Handler name 'MSPromptEachTime'
  • Handler name 'MSPhotoAcqHWEventHandler'
Approved shell extensions
Located in the registry at 'SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved'
  • CLSID: {9D687A4C-1404-41ef-A089-883B6FBECDE6}
Scheduled tasks
  • The job 'MyTurboPC.com Registration3' runs daily in the path '\MyTurboPC.com Registration3'
  • The job 'EasyShare Registration Task' runs daily in the path '\EasyShare Registration Task'
  • The task 'PC Utility Kit Registration3' runs daily in the path '\PC Utility Kit Registration3'
  • The task 'PC Unleashed Online Registration3' runs daily in the path '\PC Unleashed Online Registration3'
  • The task 'SparkTrust Registration3' runs daily in the path '\SparkTrust Registration3'
  • The job 'ParetoLogic Registration' runs daily in the path '\ParetoLogic Registration'
  • The task 'SpeedMaxPc Registration3' runs daily in the path '\SpeedMaxPc Registration3'
  • The job 'ParetoLogic Registration3' runs daily in the path '\ParetoLogic Registration3'
  • The task 'SpeedyPC Registration3' runs daily in the path '\SpeedyPC Registration3'
  • Entry path '\{DF592278-9ED5-4925-9117-7AD619F1AAA8}'
  • Entry path '\{D6488D52-E069-4A39-816E-D1598D5449A4}'
  • Entry path '\{C8536D19-006C-4D7C-B8C4-5A4B5160C5ED}'
  • Entry path '\{BBA662F7-038F-467B-8873-EB604B5242A2}'
  • Entry path '\{B86A1F70-22DB-44E2-850A-04DB8130A83A}'
  • Entry path '\{A9F6F357-C7F2-493B-9CA6-BA8096AAF4DF}'
  • Entry path '\{8A560E02-3FEE-4E3F-BD2F-E30E081ACB04}'
  • Entry path '\{898C3889-ACDA-439E-91B0-36187A01B19B}'
  • Entry path '\{0FF765F0-1DE5-461B-9F9B-936450ABA203}'
  • Entry path '\{0420CBAC-4E40-4938-9955-4C7C8595BC42}'
  • Entry path '\{00BAB955-E3A4-40EE-A715-E595C89513B0}'
  • Entry path '\EasyShare Registration Task'
  • Entry path '\MyTurboPC.com Registration3'
Startup files (user) run
Runs under the registry key 'HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run'
  • 'uprkr' → rundll32.exe ",RetrieveKey
User start menu folder
Shortcut pointer placed in '%appdata%\Microsoft\Windows\Start Menu'
  • Shortcut to 'rundll32.exe'
  • Shortcut to 'lsass.exe'
Startup files (all users) run
Runs under the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run'
  • 'CTMasterOnOffMonitor' → Rundll32.exe CTMWatch.dll StartCTMasterOnOffWatch

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Ultimate 36.50%
Windows 7 Home Premium 25.00%
Windows Vista™ Home Premium 9.00%
Windows Vista Ultimate 7.00%
Windows Vista Home Premium 4.50%
Windows 7 Professional 3.00%
Microsoft Windows 7 Professional 2.50%
Windows 8.1 2.00%
Windows 8 Pro 2.00%
Windows Vista Home Basic 1.50%
Windows 8 1.50%
Windows 8.1 Pro 1.00%
Windows 7 Home Basic 1.00%
Windows 7 Starter 1.00%
Windows 8 Single Language 0.50%
Windows 8 Enterprise 0.50%
Windows 8 Pro with Media Center 0.50%
Windows 7 Home Premium N 0.50%
Windows Server 2008 Standard 0.50%

Distribution by countryDistribution by country

United States installs about 50.56% of Windows host process (Rundll32).

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Hewlett-Packard 21.36%
Acer 18.45%
Toshiba 13.59%
Dell 13.59%
Sony 9.71%
Lenovo 9.71%
Alienware 4.85%
GIGABYTE 4.85%
ASUS 1.94%
Gateway 1.94%
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