Should I block it?

No, this file is 100% safe to run.

Additional versions

1.0.6428.0	3.03%
1.0.6365.0	9.09%
1.0.6341.0	9.09%
1.0.6304.0	3.03%
1.0.6300.0	3.03%
1.0.6289.0	3.03%
1.0.6288.0	9.09%
1.0.6276.0	15.15%
1.0.6268.0	3.03%
1.0.6267.0	9.09%
1.0.6233.234	3.03%
1.0.6225.0	9.09%
1.0.6224.6	3.03%
1.0.6159.0	3.03%
1.0.6147.0	3.03%
1.0.6087.22	3.03%
1.0.6087.0	3.03%
1.0.6033.2	3.03%
1.0.5790.2	3.03%

Relationships

Parent process

services.exe (Services and Controller app by Microsoft)

Related files

PE file structure

Show functions

Import table

advapi32.dll

RegCloseKey, RegQueryValueExW, RegOpenKeyExW, RegSetValueExW, RegCreateKeyExW, RegEnumValueA, RegQueryInfoKeyA, CopySid, GetLengthSid, IsValidSid, LookupAccountNameA, GetUserNameA, StartServiceCtrlDispatcherA, ChangeServiceConfig2A, CloseServiceHandle, CreateServiceA, OpenSCManagerA, RegSetValueExA, RegCreateKeyA, DeleteService, QueryServiceStatus, ControlService, OpenServiceA, RegDeleteValueA, StartServiceA, RegisterServiceCtrlHandlerExA, SetServiceStatus, DeregisterEventSource, ReportEventA, RegisterEventSourceA, RegQueryValueExA, RegOpenKeyExA, RegDeleteKeyA, RegCreateKeyExA, RegNotifyChangeKeyValue, SetSecurityDescriptorDacl, InitializeSecurityDescriptor, InitiateSystemShutdownA, AdjustTokenPrivileges, LookupPrivilegeValueA, OpenProcessToken, RevertToSelf, CreateProcessAsUserA, DuplicateTokenEx

kernel32.dll

GetProcAddress, GetVersionExA, InterlockedDecrement, InitializeCriticalSection, LoadLibraryA, CloseHandle, DeleteCriticalSection, MultiByteToWideChar, SetEvent, GetCurrentThreadId, GetLocalTime, OutputDebugStringA, GetLastError, DebugBreak, GetModuleFileNameA, Sleep, GetModuleHandleA, SetConsoleCtrlHandler, LocalFree, FormatMessageA, GlobalFree, GlobalAlloc, GetStdHandle, AllocConsole, CallNamedPipeA, LeaveCriticalSection, EnterCriticalSection, ReleaseMutex, WaitForSingleObject, ResetEvent, WaitForMultipleObjects, lstrlenW, CreateThread, CreateEventA, DisconnectNamedPipe, FlushFileBuffers, WriteFile, ReadFile, ConnectNamedPipe, CreateNamedPipeA, ExitThread, GetUserDefaultUILanguage, GetUserDefaultLangID, GetSystemDefaultLangID, CopyFileA, DeleteFileA, GetCurrentProcess, WideCharToMultiByte, lstrlenA, FreeLibrary, CreateMutexA, LocalAlloc, CreateFileA, CreateFileW, DeviceIoControl, SetLastError, GetCurrentThread, SetThreadPriority, SetPriorityClass, GetThreadPriority, GetPriorityClass, ExpandEnvironmentStringsA, WTSGetActiveConsoleSessionId

msvcp60.dll

DllMain

msvcrt.dll

DllMain

ole32.dll

CoCreateInstance, CoInitialize, CoUninitialize

setupapi.dll

SetupDiGetDeviceRegistryPropertyA, SetupDiDestroyDeviceInfoList, SetupDiEnumDeviceInfo, SetupDiGetClassDevsExA, CM_Reenumerate_DevNode, CM_Locate_DevNodeA, SetupDiOpenDevRegKey, SetupDiGetDeviceInterfaceDetailW, SetupDiEnumDeviceInterfaces, SetupDiGetClassDevsA

shell32.dll

SHGetFolderPathA, SHFileOperationA

user32.dll

PostMessageA, UnregisterDeviceNotification, RegisterDeviceNotificationA, CreateWindowExA, DefWindowProcA, DestroyWindow, wsprintfA, RegisterClassA

winmm.dll

mixerMessage, mixerGetNumDevs

wtsapi32.dll

WTSQueryUserToken

STacSV.exe

IDT PC Audio by IDT

Remove STacSV.exe

Version:	1.0.6225.0
MD5:	05ae358cd777bf8857f512a18e1de7aa
SHA1:	93d609ae0bbc3b802b40f00f9c38dd93c88c65f1
SHA256:	3ea85776e3e2d4a2539db3d8644b497584149d79f25c310250eaaa6e37646493

What is STacSV.exe?

IDT Audio Drivers are driver for audio devices installed within the PC. The drivers are distributed through the PC manufacture (OEM) directly.

Overview

stacsv.exe runs as a service under the name Audio Service (STacSV) with extensive SYSTEM privileges (full administrator access).

Details

File name:	stacsv.exe
Publisher:	IDT, Inc.
Product name:	IDT PC Audio
Typical file path:	C:\Program Files\idt\wdm\stacsv.exe
File version:	1.0.6225.0
Size:	216.08 KB (221,266 bytes)
Digital DNA
PE subsystem:	Windows Console
File packed:	No
Code language:	Microsoft Visual C++ 6.0
.NET CLR:	No

More details

Behaviors

Services

Runs under 'SYSTEM\CurrentControlSet\Services' by the Service Controller (services.exe)

'STacSV' (Audio Service)
STacSV

Resource utilization

(Note: statistics below are averages based on a minimum sample size of 200 unique participants)

Averages

CPU
Total CPU:	0.00944924%	0.028634%
Kernel CPU:	0.00513085%	0.013761%
User CPU:	0.00431839%	0.014873%
Kernel CPU time:	1,841 ms/min	100,923,805ms/min
CPU cycles:	16,227/sec	17,470,203/sec
Context switches:	26/sec	284/sec
Memory
Private memory:	10.77 MB	21.59 MB
Private (maximum):	7.22 MB
Private (minimum):	6.71 MB
Non-paged memory:	10.77 MB	21.59 MB
Virtual memory:	60.44 MB	140.96 MB
Virtual memory (peak):	66.94 MB	169.69 MB
Working set:	6.89 MB	18.61 MB
Working set (peak):	7.38 MB	37.95 MB
Page faults:	8,444/min	2,039/min
I/O
I/O read transfer:	0 Bytes/sec	1.02 MB/min
I/O read operations:	1/sec	343/min
I/O write transfer:	0 Bytes/sec	274.99 KB/min
I/O write operations:	1/sec	227/min
I/O other transfer:	0 Bytes/sec	448.09 KB/min
I/O other operations:	1/sec	1,671/min
Resource allocations
Threads:	10	12
Handles:	188	600

Process properties

Integrety level:	System
Platform:	32-bit
Command lines:	C:\Windows\System32\driverstore\filerepository\stwrt.inf_e2247046\stacsv.exe C:\Windows\System32\driverstore\filerepository\stwrt.inf_x86_neutral_8e7d5b9d3a91d8c5\stacsv.exe
Owner:	SYSTEM
Windows Service
Service name:	STacSV
Display name:	Audio Service
Description:	“Manages audio jack configurations.”
Type:	Win32OwnProcess
Parent process:	services.exe (Services and Controller app by Microsoft)

Threads

Averages

STacSV.exe (main module)
Total CPU:	0.01182164%	0.272967%
Kernel CPU:	0.00738605%	0.107585%
User CPU:	0.00443559%	0.165382%
CPU cycles:	749,906/sec	5,741,424/sec
Context switches:	5/sec	79/sec
Memory:	216 KB	1.16 MB
sechost.dll
Total CPU:	0.00335612%
Kernel CPU:	0.00251709%
User CPU:	0.00083903%
CPU cycles:	121,482/sec
Memory:	100 KB
MMDevApi.dll
Total CPU:	0.00167807%
Kernel CPU:	0.00167807%
User CPU:	0.00000000%
CPU cycles:	6,108/sec
Memory:	228 KB
ADVAPI32.dll
Total CPU:	0.00162893%
Kernel CPU:	0.00069811%
User CPU:	0.00093082%
CPU cycles:	24,421/sec
Memory:	792 KB

Common loaded modules

These are modules that are typiclaly loaded within the context of this process.

Distribution by Windows OS

OS version	distribution
Windows 7 Ultimate	33.33%
Windows 7 Professional	18.18%
Windows Vista Home Premium	12.12%
Microsoft Windows XP	12.12%
Windows 7 Enterprise	6.06%
Windows Vista Home Basic	6.06%
Windows 7 Home Premium	3.03%
Windows 8 Enterprise	3.03%
Windows 7 Starter	3.03%
Windows 8 Pro	3.03%

Distribution by country

United States installs about 24.24% of IDT PC Audio.

Distribution by PC manufacturer

PC Manufacturer	distribution
Hewlett-Packard	64.29%
Dell	14.29%
Acer	7.14%
Intel	7.14%
ASUS	7.14%

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