Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.3.9600.16384 (winblue_rtm.130821-1623) 2.98%
6.2.9200.16384 (win8_rtm.120725-1247) 2.17%
6.1.7600.16385 (win7_rtm.090713-1255) 0.81%
6.0.6000.16386 (vista_rtm.061101-2205) 29.54%
5.2.3790.3959 (srv03_sp2_rtm.070216-1710) 0.27%
5.1.2600.5512 (xpsp.080413-2113) 48.24%
5.1.2600.5512 (xpsp.080413-2113) 0.27%
5.1.2600.5512 (xpsp.080413-2113) 1.36%
5.1.2600.5512 (xpsp.080413-2113) 0.27%
5.1.2600.3311 (xpsp.080212-0010) 0.54%
5.1.2600.3300 (xpsp.080125-2034) 0.27%
5.1.2600.3244 (xpsp.071030-1542) 0.27%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158) 12.47%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158) 0.27%
5.1.2600.2180 (xpsp_sp2_rtm.040803-2158) 0.27%

Relationships


PE structurePE file structure

Show functions
Import table
advapi32.dll
SetTokenInformation, ImpersonateLoggedOnUser, CreateProcessAsUserW, RevertToSelf, RegisterServiceCtrlHandlerW, SetServiceStatus, OpenServiceW, DeleteService, OpenSCManagerW, CreateServiceW, CloseServiceHandle, ChangeServiceConfig2W, GetSecurityDescriptorDacl, GetAclInformation, GetLengthSid, InitializeAcl, GetAce, AddAccessAllowedAce, AddAce, InitializeSecurityDescriptor, EqualSid, GetTokenInformation, OpenThreadToken, AllocateAndInitializeSid, OpenProcessToken, SystemFunction041, SetSecurityDescriptorDacl, FreeSid, RegisterServiceCtrlHandlerExW, PrivilegeCheck, GetUserNameW
api-ms-win-service-core-l1-1-1.dll
SetServiceStatus, RegisterServiceCtrlHandlerExW
kernel32.dll
GetProcessHeap, LeaveCriticalSection, EnterCriticalSection, GetModuleHandleW, UnregisterWaitEx, DeleteCriticalSection, SetLastError, HeapAlloc, InitializeCriticalSection, GetQueuedCompletionStatus, TerminateProcess, RegisterWaitForSingleObject, QueueUserWorkItem, SetInformationJobObject, AssignProcessToJobObject, CreateJobObjectW, ResumeThread, GetCurrentProcess, ProcessIdToSessionId, OpenProcess, TerminateJobObject, DisableThreadLibraryCalls, QueryPerformanceCounter, GetTickCount, GetCurrentThreadId, GetCurrentProcessId, GetSystemTimeAsFileTime, UnhandledExceptionFilter, SetUnhandledExceptionFilter, LocalAlloc, LocalFree, HeapFree, ReadProcessMemory, DuplicateHandle, WriteProcessMemory, GetLastError, GetCurrentThread, CloseHandle, CreateIoCompletionPort, InterlockedCompareExchange, Sleep, InterlockedExchange, CreateEventW, UnregisterWait, SetEvent, UpdateProcThreadAttribute, InitializeProcThreadAttributeList, GetCurrentDirectoryW, ResolveDelayLoadedAPI, DelayLoadFailureHook
msvcrt.dll
DllMain
ntdll.dll
RtlInitString, RtlLengthSid, RtlAdjustPrivilege, NtQueryInformationProcess, RtlNtStatusToDosError, RtlInitUnicodeString, RtlSubAuthoritySid, RtlInitializeSid, RtlLengthRequiredSid, RtlCopySid, RtlAllocateAndInitializeSid, RtlSidDominates, RtlFreeSid, RtlQueryEnvironmentVariable, RtlSetEnvironmentVar
rpcrt4.dll
RpcRevertToSelfEx, I_RpcBindingIsClientLocal, RpcServerRegisterIfEx, RpcServerUseProtseqEpW, RpcServerUnregisterIf, RpcImpersonateClient, NdrServerCall2, RpcRaiseException
secur32.dll
LsaFreeReturnBuffer, LsaRegisterLogonProcess, LsaLookupAuthenticationPackage, LsaLogonUser, SeciFreeCallContext, SeciAllocateAndSetIPAddress, LsaDeregisterLogonProcess
user32.dll
LoadStringW, GetUserObjectSecurity, SetUserObjectSecurity
userenv.dll
UnloadUserProfile, DestroyEnvironmentBlock, LoadUserProfileW, CreateEnvironmentBlock
Export table
DllRegisterServer
DllUnregisterServer
SvcEntry_Seclogon
SvchostPushServiceGlobals

seclogon.dll

Secondary Logon Service DLL by Microsoft

Remove seclogon.dll
Version:   5.1.2600.5512 (xpsp.080413-2113)
MD5:   da4a54083c37f21d77b5c7e13dad0c6a
SHA1:   e6c8bebe3524bc96a7a3598695270028c3e7466d
This is a Windows system installed file with Windows File Protection (WFP) enabled.

Overview

seclogon.dll is loaded as dynamic link library that runs in the context of a process. This version is installed on Windows XP.

DetailsDetails

File name:seclogon.dll
Publisher:Microsoft Corporation
Product name:Secondary Logon Service DLL
Description:Microsoft® Windows® Operating System
Typical file path:C:\Windows\System32\seclogon.dll
Original name:SECLOGON.EXE
File version:5.1.2600.5512 (xpsp.080413-2113)
Product version:5.1.2600.5512
Size:18 KB (18,432 bytes)
Build date:4/15/2008 6:54 PM
Digital DNA
PE subsystem:Windows Console
File packed:No
Code language:Microsoft Visual C++
.NET CLR:No
More details

BehaviorsBehaviors

Hosted services
Runs as a shared service under the Windows svcHost
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'
  • Shared name is 'seclogon'

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Microsoft Windows XP 61.50%
Windows Vista Home Premium 19.00%
Windows Vista Home Basic 6.00%
Windows 8.1 Pro 3.00%
Windows Vista Business 3.00%
Windows 8.1 2.50%
Windows Vista Ultimate 1.50%
Windows 8 Pro 1.00%
Windows 7 Ultimate 1.00%
Windows 8 Enterprise Evaluation 0.50%
Windows 8 0.50%
Windows 8 Pro N 0.50%

Distribution by countryDistribution by country

United States installs about 52.36% of Secondary Logon Service DLL.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Dell 34.57%
Hewlett-Packard 10.70%
Toshiba 10.70%
Intel 9.88%
Sony 5.76%
ASUS 4.12%
GIGABYTE 4.12%
Compaq 4.12%
Lenovo 3.29%
American Megatrends 3.29%
Gateway 3.29%
Acer 2.88%
Sahara 2.06%
Alienware 0.41%
Packard Bell 0.41%
Samsung 0.41%
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