Should I block it?

No, this file is 100% safe to run.

Additional versions

1.0.5866.0 nd694 cp1	66.67%
1.0.5713.0 nd645 cp1	6.67%
1.0.5614.0 nd654 cp1	20.00%
1.0.5607.0 nd609 cp1	6.67%

Relationships

Parent process

services.exe (Services and Controller app by Microsoft)

Related files

PE file structure

Show functions

Import table

advapi32.dll

RegCloseKey, 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, SetSecurityDescriptorDacl, InitializeSecurityDescriptor, RegSetValueExW, RegCreateKeyExW, RegQueryValueExW, RegOpenKeyExW

kernel32.dll

Sleep, GetProcAddress, GetModuleHandleA, SetConsoleCtrlHandler, LocalFree, FormatMessageA, GlobalFree, GlobalAlloc, GetStdHandle, AllocConsole, CallNamedPipeA, CloseHandle, WaitForSingleObject, WaitForMultipleObjects, ResetEvent, SetEvent, CreateThread, CreateEventA, DisconnectNamedPipe, FlushFileBuffers, WriteFile, ReadFile, ConnectNamedPipe, CreateNamedPipeA, ExitThread, MultiByteToWideChar, LoadLibraryA, FreeLibrary, CreateFileA, CreateFileW, DeviceIoControl, SetLastError, GetVersionExA, GetLastError, OutputDebugStringA, GetModuleFileNameA, LocalAlloc, InterlockedDecrement, WideCharToMultiByte

msvcrt.dll

DllMain

ole32.dll

CoUninitialize, CoCreateInstance, CoInitialize

setupapi.dll

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

user32.dll

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

winmm.dll

mixerMessage, mixerGetNumDevs

STacSV.exe

IDT Audio by IDT

Remove STacSV.exe

Version:	1.0.5614.0 nd654 cp1
MD5:	7e6dd4b34acd36af6c711d2bde91b040
SHA1:	0cb320fe758472ef7607be2ec4f7f5a3858fe3bc
SHA256:	737c76749fe53a968e558289613a6ed5a0263f9585a47028343284f64808ac67

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). This is typically installed with the program SigmaTel Audio published by SigmaTel.

Details

File name:	STacSV.exe
Publisher:	IDT, Inc.
Product name:	IDT Audio
Description:	STacSV Module
Typical file path:	C:\Windows\System32\driverstore\filerepository\stwrt.inf_x86_neutral_24288096a5cd99f6\stacsv.exe
File version:	1.0.5614.0 nd654 cp1
Size:	100 KB (102,400 bytes)
Digital DNA
PE subsystem:	Windows Console
Entropy:	5.965076
File packed:	No
Code language:	Microsoft Visual C++
.NET CLR:	No

More details

Programs

The following program will install this file

SigmaTel Audio

SigmaTel

12% remove

SigmaTel Audio is (was) a line of audio codec chips that were integrated into many desktops, notebooks, and other audio playback devices, notably MP3 players. Audio encoding and recording to flash memory in MP3 and WAV formats are supported from microphone, SigmaTel FM IC (STFM1000) digital audio source, or line-in. Printed Circuit Board (PCB) layouts and reference schematics were provided to OEM and Original Development Manufacturing (...

Behaviors

Services

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

'STacSV' (Audio Service)
STacSV
'STacSV' (SigmaTel Audio Service)

Resource utilization

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

Averages

CPU
Total CPU:	0.00045695%	0.028634%
Kernel CPU:	0.00028707%	0.013761%
User CPU:	0.00016988%	0.014873%
Kernel CPU time:	14,492 ms/min	100,923,805ms/min
CPU cycles:	1,376,105/sec	17,470,203/sec
Memory
Private memory:	7.36 MB	21.59 MB
Private (maximum):	5.53 MB
Private (minimum):	5.3 MB
Non-paged memory:	7.36 MB	21.59 MB
Virtual memory:	43 MB	140.96 MB
Virtual memory (peak):	49.5 MB	169.69 MB
Working set:	5.33 MB	18.61 MB
Working set (peak):	6.05 MB	37.95 MB
Page faults:	3,332/min	2,039/min
I/O
I/O read transfer:	2 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:	4.11 KB/sec	448.09 KB/min
I/O other operations:	526/sec	1,671/min
Resource allocations
Threads:	8	12
Handles:	160	600

Process properties

Integrety level:	System
Platform:	32-bit
Command line:	C:\Windows\System32\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:	0.00088486%	0.272967%
Kernel CPU:	0.00062316%	0.107585%
User CPU:	0.00026170%	0.165382%
CPU cycles:	439,801/sec	5,741,424/sec
Memory:	100 KB	1.16 MB
sechost.dll
Total CPU:	0.00021432%
Kernel CPU:	0.00021432%
User CPU:	0.00000000%
CPU cycles:	15,912/sec
Memory:	100 KB
ADVAPI32.dll
Total CPU:	0.00001223%
Kernel CPU:	0.00000612%
User CPU:	0.00000612%
CPU cycles:	208/sec
Memory:	792 KB
ole32.dll
Total CPU:	0.00000245%
Kernel CPU:	0.00000245%
User CPU:	0.00000000%
CPU cycles:	650/sec
Memory:	1.27 MB

Common loaded modules

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

stapi32.dll (IDT Audio by IDT)

Distribution by Windows OS

OS version	distribution
Windows 7 Ultimate	66.67%
Windows Vista Home Premium	20.00%
Microsoft Windows XP	13.33%

Distribution by country

United States installs about 70.00% of IDT Audio.

Distribution by PC manufacturer

PC Manufacturer	distribution
Sony	66.67%
Dell	33.33%

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