Should I block it?

60%
60% of PCs block this file from running.
Possible reason:
Performance resource utilization

VersionsAdditional versions

05b13 14.08%
68839 1.41%
11c3a 8.45%
52c18 12.68%
89238 1.41%
be4d9 2.82%
f85eb 1.41%
872f6 1.41%
8ac7e 9.86%
6caf3 4.23%
0ec38 7.04%
c7007 4.23%
81eac 1.41%
bd893 2.82%
a3224 1.41%
08e67 1.41%
99da6 4.23%
60981 7.04%
9b67a 4.23%
45f31 1.41%
199a8 1.41%
ce882 1.41%
36c55 1.41%
382f8 1.41%
418c5 1.41%
(Note, Perion Network Ltd. publishes each variation of this file with the same version, but the hashes are unique.)

Relationships


PE structurePE file structure

Show functions
Import table
advapi32.dll
RegQueryValueExW, RegSetValueExW, RegEnumKeyExW, RegDeleteValueW, RegisterEventSourceW, DeregisterEventSource, ReportEventW, StartServiceCtrlDispatcherW, RegisterServiceCtrlHandlerExW, SetServiceStatus, ChangeServiceConfig2W, StartServiceW, QueryServiceStatusEx, CloseServiceHandle, OpenServiceW, OpenSCManagerW, CreateProcessAsUserW, DuplicateTokenEx, RegOpenCurrentUser, RevertToSelf, ImpersonateLoggedOnUser, OpenProcessToken, RegNotifyChangeKeyValue, RegOpenKeyExW, RegCloseKey, RegCreateKeyExW
kernel32.dll
lstrcmpiW, LockResource, GetModuleFileNameW, GetTempPathW, CreateFileW, GetModuleHandleExW, GetCurrentProcessId, SizeofResource, LoadResource, FindResourceW, GetTickCount, GetFileAttributesW, GetComputerNameExW, Sleep, Process32NextW, OpenProcess, Process32FirstW, CreateToolhelp32Snapshot, WaitForMultipleObjects, GetModuleHandleW, GetProcAddress, GetLastError, DeleteFileW, CreateThread, ResetEvent, CreateEventW, CloseHandle, TerminateThread, WaitForSingleObject, GetVersionExW, TerminateProcess, InterlockedDecrement, GetCurrentThreadId, MultiByteToWideChar, lstrlenA, SetEvent, LeaveCriticalSection, EnterCriticalSection, DeleteCriticalSection, InitializeCriticalSection, WideCharToMultiByte, InterlockedIncrement, lstrlenW, IsDebuggerPresent, SetUnhandledExceptionFilter, UnhandledExceptionFilter, GetCurrentProcess, GetStartupInfoW, HeapSetInformation, InterlockedExchange, DecodePointer, EncodePointer, InitializeCriticalSectionAndSpinCount, RaiseException, LocalAlloc, GetLocalTime, SetCurrentDirectoryW, FindResourceExW, GetPrivateProfileSectionNamesW, GetPrivateProfileIntW, GetPrivateProfileStringW, DeleteFileA, AreFileApisANSI, GetSystemTime, GetTempPathA, GetVersionExA, OutputDebugStringA, GetFileAttributesExW, GetSystemInfo, GetDiskFreeSpaceA, CreateFileMappingW, LoadLibraryA, GetDiskFreeSpaceW, LockFileEx, HeapSize, FlushFileBuffers, ReadFile, HeapValidate, HeapCreate, GetFileAttributesA, HeapDestroy, FormatMessageW, LoadLibraryW, WriteFile, FormatMessageA, GetSystemTimeAsFileTime, GetProcessHeap, UnlockFileEx, OutputDebugStringW, WaitForSingleObjectEx, LockFile, UnlockFile, InterlockedCompareExchange, HeapFree, QueryPerformanceCounter, SetFilePointerEx, SystemTimeToFileTime, HeapAlloc, FreeLibrary, SetEndOfFile, UnmapViewOfFile, MapViewOfFile, SetFilePointer, CreateMutexW, GetFileSize, CreateFileA, HeapReAlloc, GetFullPathNameA, GetFullPathNameW, CreateDirectoryW, LocalFree, FindCloseChangeNotification, FindNextChangeNotification, FindFirstChangeNotificationW, IsProcessorFeaturePresent, SetLastError, SearchPathW, GetModuleFileNameA, IsWow64Process, lstrcmpiA
msvcp100.dll
DllMain
msvcr100.dll
DllMain
ole32.dll
CoCreateInstance, CoSetProxyBlanket, CoInitialize, CoUninitialize, CoCreateGuid, StringFromCLSID, CoTaskMemFree, OleRun, CoInitializeSecurity
shell32.dll
ShellExecuteExW, SHGetMalloc, SHGetPathFromIDListW, SHGetSpecialFolderLocation, ShellExecuteW, SHCreateDirectoryExW, SHGetFolderLocation
shlwapi.dll
PathIsURLW, StrCmpIW
urlmon.dll
URLDownloadToFileW
user32.dll
SetTimer, PostThreadMessageW, DispatchMessageW, TranslateMessage, PostMessageW, KillTimer, DefWindowProcW, DestroyWindow, RegisterClassW, GetMessageW, SetWindowLongW, CreateWindowExW, CharLowerW, wsprintfW, PeekMessageW, MsgWaitForMultipleObjectsEx, CharLowerBuffW
userenv.dll
DestroyEnvironmentBlock, CreateEnvironmentBlock
version.dll
GetFileVersionInfoW, VerQueryValueW, GetFileVersionInfoSizeW
wtsapi32.dll
WTSQuerySessionInformationW, WTSEnumerateSessionsW, WTSFreeMemory

dmwu.exe

By Perion Network Ltd. (Signed)

Remove dmwu.exe
MD5:   be4d946b5d8745dd7cd4ca9ca04f4989
SHA1:   1039baa39b5fc7e73168e6e16156e589c7cd6ac9
SHA256:   2b3f6395c3d2d0a99b50e784890f25aa7c74ffd4477867e485a8442cc9cf6562

What is dmwu.exe?

dmwu.exe is the installation service for Web Optimizer, an ad-supported program. Web Optimizer by Perion Network Ltd. is a web browser extension and browser helper object (BHO) for Internet Explorer and Firefox (extension) and distributed through Perion Networks. The Web Optimizer extension includes a search bar which provides modified search redirection results and a search provider. Web Optimizer will attempt to change the default home page of the user's web browser as well.

Overview

dmwu.exe runs as a service under the name Updater Service (IBUpdaterService) within the local user context. It has been configured with a firewall exception which allows both inbound and outbound network communication without being blocked. The file is digitally signed by Perion Network Ltd. which was issued by the VeriSign certificate authority (CA).

DetailsDetails

File name:dmwu.exe
Typical file path:C:\Windows\System32\dmwu.exe
Size:989.8 KB (1,013,552 bytes)
Certificate
Issued to:Perion Network Ltd.
Authority (CA):VeriSign
Effective date:Tuesday, April 24, 2012
Expiration date:Friday, April 24, 2015
Digital DNA
PE subsystem:Windows GUI
File packed:No
Code language:Microsoft Visual C++ 10.0
.NET CLR:No
More details

BehaviorsBehaviors

Services
Runs under 'SYSTEM\CurrentControlSet\Services' by the Service Controller (services.exe)
  • 'IBUpdaterService' (Updater Service)
  • WebOptimizer
Windows firewall allowed programs
Exceptions allow programs to access to the Internet through an outbound connections
  • Firewall exception for 'C:\WINDOWS\system32\dmwu.exe'
Network connections
Access through an approved Windows firewall exception
  • [UDP] listens on port 54257

  • ResourcesResource utilization

    (Note: statistics below are averages based on a minimum sample size of 200 unique participants)
    Averages
     
    CPU
    Total CPU:0.00018883%
    0.028634%
    Kernel CPU:0.00012601%
    0.013761%
    User CPU:0.00006282%
    0.014873%
    Kernel CPU time:134,375 ms/min
    100,923,805ms/min
    Memory
    Private memory:2.66 MB
    21.59 MB
    Private (maximum):9.99 MB
    Private (minimum):8.2 MB
    Non-paged memory:2.66 MB
    21.59 MB
    Virtual memory:72.02 MB
    140.96 MB
    Virtual memory (peak):76.12 MB
    169.69 MB
    Working set:9.97 MB
    18.61 MB
    Working set (peak):10.08 MB
    37.95 MB
    Resource allocations
    Threads:8
    12
    Handles:994
    600

    BehaviorsProcess properties

    Integrety level:System
    Platform:32-bit
    Command line:C:\Windows\System32\dmwu.exe
    Owner:User
    Windows Service
    Service name:IBUpdaterService
    Display name:Updater Service
    Description:“Updater Service”
    Type:Win32OwnProcess
    Parent process:services.exe (Services and Controller app by Microsoft)

    Windows OS versionsDistribution by Windows OS

    OS versiondistribution
    Windows 7 Ultimate 30.00%
    Windows 7 Home Premium 24.29%
    Microsoft Windows XP 17.14%
    Windows 7 Professional 10.00%
    Windows 8 5.71%
    Windows Vista Home Premium 5.71%
    Windows 8 Single Language 2.86%
    Windows 8.1 Pro with Media Center 1.43%
    Windows 8 Pro 1.43%
    Windows 8 Release Preview 1.43%

    Distribution by countryDistribution by country

    United States installs about 34.29% of dmwu.exe.

    OEM distributionDistribution by PC manufacturer

    PC Manufacturerdistribution
    Hewlett-Packard 28.81%
    Acer 23.73%
    Toshiba 16.95%
    Sony 10.17%
    Dell 10.17%
    MSI 3.39%
    ASUS 3.39%
    GIGABYTE 3.39%
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