Should I block it?

No, this file is 100% safe to run.

Additional versions

6.3.9600.16384 (winblue_rtm.130821-1623)	6.97%
6.3.9600.16384 (winblue_rtm.130821-1623)	0.61%
6.3.9600.16384 (winblue_rtm.130821-1623)	12.73%
6.3.9431.0 (winmain_bluemp.130615-1214)	1.21%
6.3.9431.0 (winmain_bluemp.130615-1214)	0.30%
6.2.9200.16384 (win8_rtm.120725-1247)	64.85%
6.2.9200.16384 (win8_rtm.120725-1247)	12.73%
6.2.8102.0 (winmain_win8m3.110823-1455)	0.61%

Relationships

dashost.exe (Device Association Framework Provider Host by Microsoft)

PE file structure

Show functions

Import table

api-ms-win-core-apiquery-l1-1-0.dll

ApiSetQueryApiSetPresence

api-ms-win-core-delayload-l1-1-1.dll

ResolveDelayLoadedAPI, DelayLoadFailureHook

api-ms-win-core-errorhandling-l1-1-0.dll

RaiseException, GetLastError, SetUnhandledExceptionFilter, UnhandledExceptionFilter, SetLastError

api-ms-win-core-errorhandling-l1-1-1.dll

RaiseException, UnhandledExceptionFilter, SetUnhandledExceptionFilter, SetLastError, GetLastError

api-ms-win-core-file-l1-1-1.dll

GetFullPathNameW, FileTimeToSystemTime, GetFileAttributesW, CreateDirectoryW

api-ms-win-core-file-l1-2-0.dll

GetFullPathNameW, GetFileAttributesW, CreateDirectoryW

api-ms-win-core-file-l1-2-1.dll

GetFullPathNameW, GetFileAttributesW, CreateDirectoryW

api-ms-win-core-handle-l1-1-0.dll

DuplicateHandle, CloseHandle

api-ms-win-core-heap-l1-1-0.dll

GetProcessHeap, HeapAlloc, HeapFree

api-ms-win-core-heap-l1-2-0.dll

HeapFree, HeapAlloc, GetProcessHeap

api-ms-win-core-heap-obsolete-l1-1-0.dll

LocalFree

api-ms-win-core-interlocked-l1-1-0.dll

InterlockedCompareExchange64, InterlockedExchange, InterlockedDecrement, InterlockedPushEntrySList, InterlockedCompareExchange, InterlockedIncrement, InitializeSListHead, InterlockedPopEntrySList

api-ms-win-core-interlocked-l1-2-0.dll

InterlockedExchange, InitializeSListHead, InterlockedIncrement, InterlockedPopEntrySList, InterlockedCompareExchange, InterlockedPushEntrySList, InterlockedCompareExchange64, InterlockedDecrement

api-ms-win-core-libraryloader-l1-1-1.dll

DisableThreadLibraryCalls, FreeLibrary, GetProcAddress, LoadLibraryExW, GetModuleHandleExW

api-ms-win-core-libraryloader-l1-2-0.dll

GetModuleHandleExW, FreeLibrary, LoadLibraryExW, DisableThreadLibraryCalls, GetProcAddress

api-ms-win-core-processthreads-l1-1-1.dll

GetCurrentProcess, GetExitCodeProcess, OpenProcess, CreateProcessAsUserW, TerminateProcess, GetCurrentThreadId, GetCurrentProcessId, SetThreadToken, GetCurrentThread, OpenProcessToken, OpenThreadToken

api-ms-win-core-processthreads-l1-1-2.dll

TerminateProcess, GetExitCodeProcess, GetCurrentProcessId, OpenProcessToken, OpenThreadToken, GetCurrentProcess, GetCurrentThread, CreateProcessAsUserW, GetCurrentThreadId, SetThreadToken, OpenProcess

api-ms-win-core-profile-l1-1-0.dll

QueryPerformanceCounter

api-ms-win-core-registry-l1-1-0.dll

RegGetValueW, RegOpenKeyExW, RegEnumKeyExW, RegCloseKey

api-ms-win-core-string-l1-1-0.dll

CompareStringOrdinal

api-ms-win-core-string-obsolete-l1-1-0.dll

lstrlenW

api-ms-win-core-synch-l1-1-1.dll

DeleteCriticalSection, SetEvent, ReleaseSRWLockExclusive, AcquireSRWLockExclusive, InitializeCriticalSection, ResetEvent, LeaveCriticalSection, ReleaseSRWLockShared, SleepEx, EnterCriticalSection, InitializeSRWLock, CreateEventW, Sleep, AcquireSRWLockShared, WaitForSingleObjectEx, WaitForSingleObject, OpenEventW

api-ms-win-core-synch-l1-2-0.dll

DeleteCriticalSection, ReleaseSRWLockShared, OpenEventW, ReleaseSRWLockExclusive, Sleep, InitializeSRWLock, EnterCriticalSection, InitializeCriticalSection, SetEvent, SleepEx, AcquireSRWLockExclusive, ResetEvent, WaitForSingleObject, CreateEventW, AcquireSRWLockShared, WaitForSingleObjectEx, LeaveCriticalSection

api-ms-win-core-sysinfo-l1-1-1.dll

GetTickCount, GetSystemTimeAsFileTime, GetSystemWindowsDirectoryW

api-ms-win-core-sysinfo-l1-2-0.dll

GetSystemTimeAsFileTime, GetTickCount, GetSystemWindowsDirectoryW

api-ms-win-core-sysinfo-l1-2-1.dll

GetSystemWindowsDirectoryW, GetTickCount, GetSystemTimeAsFileTime

api-ms-win-core-threadpool-l1-1-1.dll

CloseThreadpoolCleanupGroupMembers, CreateThreadpoolTimer, WaitForThreadpoolWaitCallbacks, CreateThreadpoolCleanupGroup, SubmitThreadpoolWork, CloseThreadpoolWork, CreateThreadpoolWork, CreateThreadpoolWait, FreeLibraryWhenCallbackReturns, WaitForThreadpoolWorkCallbacks, SetThreadpoolTimer, CallbackMayRunLong, TrySubmitThreadpoolCallback, CloseThreadpoolTimer, WaitForThreadpoolTimerCallbacks, SetThreadpoolWait, CloseThreadpoolCleanupGroup

api-ms-win-core-threadpool-l1-2-0.dll

CallbackMayRunLong, CloseThreadpoolTimer, SetThreadpoolTimer, CreateThreadpoolTimer, TrySubmitThreadpoolCallback, SubmitThreadpoolWork, CreateThreadpoolWait, CloseThreadpoolWork, SetThreadpoolWait, CreateThreadpoolWork, CloseThreadpoolWait, CloseThreadpoolCleanupGroup, WaitForThreadpoolWaitCallbacks, FreeLibraryWhenCallbackReturns, CreateThreadpoolCleanupGroup, WaitForThreadpoolWorkCallbacks, WaitForThreadpoolTimerCallbacks, CloseThreadpoolCleanupGroupMembers

api-ms-win-devices-query-l1-1-1.dll

DevFreeObjectProperties, DevGetObjectPropertiesEx

api-ms-win-devices-swdevice-l1-1-0.dll

SwMemFree, SwDeviceInterfaceRegister, SwDeviceClose, SwDevicePropertySet, SwDeviceCreate, SwDeviceInterfaceSetState, SwDeviceInterfacePropertySet

api-ms-win-devices-swdevice-l1-1-1.dll

SwDeviceInterfaceRegister, SwMemFree, SwDeviceClose, SwDevicePropertySet, SwDeviceCreate, SwDeviceInterfaceSetState, SwDeviceInterfacePropertySet

api-ms-win-eventing-classicprovider-l1-1-0.dll

TraceMessage, GetTraceLoggerHandle, UnregisterTraceGuids, RegisterTraceGuidsW, GetTraceEnableLevel, GetTraceEnableFlags

api-ms-win-eventing-provider-l1-1-0.dll

EventUnregister, EventWrite, EventActivityIdControl, EventRegister

api-ms-win-obsolete-kernelbase-l1-1-0.dll

lstrlenW, LocalFree

api-ms-win-security-base-l1-1-0.dll

AllocateAndInitializeSid, GetKernelObjectSecurity, AdjustTokenPrivileges, DuplicateToken, CreateWellKnownSid, RevertToSelf, SetSecurityDescriptorOwner, ImpersonateLoggedOnUser, SetSecurityDescriptorDacl, InitializeSecurityDescriptor, DuplicateTokenEx

api-ms-win-security-base-l1-2-0.dll

GetKernelObjectSecurity, AdjustTokenPrivileges, SetSecurityDescriptorDacl, DuplicateToken, CreateWellKnownSid, DuplicateTokenEx, FreeSid, RevertToSelf, SetSecurityDescriptorOwner, AllocateAndInitializeSid, ImpersonateLoggedOnUser, InitializeSecurityDescriptor

api-ms-win-security-sddl-l1-1-0.dll

ConvertSecurityDescriptorToStringSecurityDescriptorW, ConvertSidToStringSidW, ConvertStringSecurityDescriptorToSecurityDescriptorW

api-ms-win-service-core-l1-1-1.dll

RegisterServiceCtrlHandlerExW, SetServiceStatus

api-ms-win-service-management-l1-1-0.dll

OpenServiceW, CloseServiceHandle, OpenSCManagerW

api-ms-win-service-management-l2-1-0.dll

ChangeServiceConfigW

msvcrt.dll

DllMain

ntdll.dll

RtlNtStatusToDosError, RtlCompareMemory, RtlTimeToTimeFields, RtlEqualUnicodeString, LdrGetProcedureAddress, RtlInitAnsiString, LdrGetDllHandle, RtlInitUnicodeString, RtlGetGroupSecurityDescriptor, RtlGetSaclSecurityDescriptor, RtlGetOwnerSecurityDescriptor, NtQueryValueKey, NtSetValueKey, NtDeleteValueKey, NtEnumerateValueKey, NtEnumerateKey, NtSetSecurityObject, NtQueryKey, NtDeleteKey, NtCreateKey, NtOpenKey, RtlAddAce, RtlCopySid, RtlGetDaclSecurityDescriptor, NtSetInformationThread, NtAdjustPrivilegesToken, NtDuplicateToken, NtQuerySecurityObject, NtOpenProcessToken, NtOpenThreadToken, RtlAbsoluteToSelfRelativeSD, RtlValidSecurityDescriptor, RtlSetGroupSecurityDescriptor, RtlSetOwnerSecurityDescriptor, RtlSetDaclSecurityDescriptor, RtlCreateSecurityDescriptor, RtlAddAccessAllowedAceEx, RtlLengthSid, RtlValidSid, RtlFreeUnicodeString, RtlPrefixUnicodeString, RtlFormatCurrentUserKeyPath, RtlGetVersion, RtlUnicodeStringToInteger, RtlGUIDFromString, RtlInitUnicodeStringEx, RtlLengthSecurityDescriptor, RtlValidRelativeSecurityDescriptor, NtClose, RtlEqualSid, RtlSubAuthoritySid, RtlInitializeSid, RtlLengthRequiredSid, NtQueryInformationToken, NtOpenProcessTokenEx, NtOpenThreadTokenEx, RtlFreeHeap, RtlAllocateHeap, WinSqmAddToStreamEx, WinSqmSetDWORD, RtlAddAccessAllowedAce, RtlCreateAcl, WinSqmIsOptedIn, RtlLookupElementGenericTableAvl, RtlEnumerateGenericTableAvl, RtlInitializeGenericTableAvl, RtlInsertElementGenericTableAvl, RtlDeleteElementGenericTableAvl, RtlStringFromGUID

rpcrt4.dll

MesEncodeIncrementalHandleCreate, UuidFromStringW, RpcAsyncCompleteCall, RpcAsyncAbortCall, I_RpcExceptionFilter, RpcRevertToSelf, RpcImpersonateClient, RpcServerUnsubscribeForNotification, RpcAsyncInitializeHandle, RpcBindingFromStringBindingW, RpcStringBindingComposeW, RpcBindingFree, RpcStringFreeW, RpcServerInterfaceGroupClose, RpcServerInterfaceGroupActivate, RpcServerInterfaceGroupCreateW, I_RpcMapWin32Status, I_RpcBindingInqLocalClientPID, RpcExceptionFilter, MesHandleFree, MesIncrementalHandleReset, RpcServerInterfaceGroupDeactivate, UuidCreate, MesDecodeIncrementalHandleCreate, NdrAsyncClientCall, NdrClientCall2, NdrMesTypeEncode2, NdrAsyncServerCall, NdrServerCall2, NdrMesTypeDecode2, NdrMesTypeAlignSize2, RpcServerSubscribeForNotification, MesDecodeBufferHandleCreate, RpcBindingSetOption, RpcSsDestroyClientContext, MesEncodeDynBufferHandleCreate, RpcEpUnregister, RpcBindingVectorFree, RpcServerUseProtseqW, RpcEpRegisterW, I_RpcBindingIsClientLocal, RpcServerInqBindings, RpcServerUnregisterIfEx, RpcServerRegisterIfEx

das.dll

Device Association Service by Microsoft

Remove das.dll

Version:	6.3.9431.0 (winmain_bluemp.130615-1214)
MD5:	119790a1d3ceb8fd3e01d357580aad10
SHA1:	c3797440c75b9d34ec37b63e4aab33593ee611b4
SHA256:	ad0a8f44e06e336b47634891ba11f6748ac517653e7d72ad661d44c6754ea809

This is a Windows system installed file with Windows File Protection (WFP) enabled.

What is das.dll?

Device Association Service enables pairing between the system and wired or wireless devices. This service is new for Windows 8.

Overview

das.dll is loaded as dynamic link library that runs in the context of a process. The assembly utilizes the .NET run-time framework (which is required to be installed on the PC). .

Details

File name:	das.dll
Publisher:	Microsoft Corporation
Product name:	Device Association Service
Description:	Microsoft® Windows® Operating System
Typical file path:	C:\Windows\System32\das.dll
Original name:	das.dll.mui
File version:	6.3.9431.0 (winmain_bluemp.130615-1214)
Product version:	6.3.9431.0
Size:	389 KB (398,336 bytes)
Build date:	6/15/2013 3:35 PM
Digital DNA
File packed:	No
Code language:	Microsoft Visual C# / Basic .NET
.NET CLR:	Yes
.NET NGENed:	No

More details

Behaviors

Hosted services

Runs as a shared service under the Windows svcHost

Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'
Shared name is 'DeviceAssociationService'

Distribution by Windows OS

OS version	distribution
Windows 8	28.50%
Windows 8 Pro	21.00%
Windows 8.1	18.50%
Windows 8.1 Pro	8.50%
Windows 8 Single Language	6.00%
Windows 8.1 Single Language	4.00%
Windows 8 Enterprise	3.50%
Windows 8 Pro with Media Center	3.50%
Windows 8.1 Pro Preview	1.50%
Windows 8.1 Pro with Media Center	1.00%
Windows Developer Preview	1.00%
Windows 8.1 N	0.50%
Windows 8.1 Enterprise Evaluation	0.50%
Windows 8 Enterprise Evaluation	0.50%
Windows 8.1 Single Language Preview	0.50%
Windows 8.1 Pro Preview with Media Center	0.50%
Windows 8 Pro N	0.50%

Distribution by country

United States installs about 37.69% of Device Association Service.

Distribution by PC manufacturer

PC Manufacturer	distribution
Toshiba	15.91%
Hewlett-Packard	15.15%
ASUS	13.64%
Lenovo	13.64%
Dell	12.88%
Acer	11.74%
Sony	7.58%
GIGABYTE	3.03%
Intel	2.27%
Samsung	1.52%
Alienware	0.76%
American Megatrends	0.76%
MSI	0.76%
Packard Bell	0.38%

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