wuauserv[.]dll

Sharing

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General

Target

wuauserv.dll
Size

134KB
MD5

f57e265addc4a5784eb7e9e595b2e60e
SHA1

faf08f19d6583c8d551237fcf2f0e6e5b23dcef7
SHA256

9db21e76ac73213cd59c58ce2c3c5b2f831e8c2ceb89bca2a7320ae9861e5bd9
SHA512

1510a5d15370ad534560d582736de4f15f0837bba9aeff9df150d140de8c3e6c7682413b3cb9dec4d4a3d7d38a49b4269148cae2e20c0b2bf020590f59e39061
SSDEEP

3072:2tpRvB0XdyOT2jlTigLjrOtCNY/zzUPnYcebeoGzu0af/JYf9XU:2tfpET4Tz3ytfrsYwoGu5U9k

Score

1^/10

Malware Config

Signatures

Files

wuauserv.dll
.dll windows x64

c4bb93c3d76b141925f419e5bb266fe0

Code Sign

33:00:00:03:3b:65:5f:ae:fa:db:75:e9:d6:00:00:00:00:03:3b
Certificate

Issuer

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

02/09/2021, 18:23

Not After

01/09/2022, 18:23

Subject

CN=Microsoft Windows,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Extended Key Usages

ExtKeyUsageCodeSigning

61:07:76:56:00:00:00:00:00:08
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2010,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

19/10/2011, 18:41

Not After

19/10/2026, 18:51

Subject

CN=Microsoft Windows Production PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

78:05:c0:66:5d:b1:60:15:b4:2b:7a:07:dd:6d:3a:a3:8d:6c:d4:22:b9:53:a2:8f:89:44:54:0a:31:8f:31:f1
Signer

Actual PE Digest

78:05:c0:66:5d:b1:60:15:b4:2b:7a:07:dd:6d:3a:a3:8d:6c:d4:22:b9:53:a2:8f:89:44:54:0a:31:8f:31:f1

Digest Algorithm

sha256

PE Digest Matches

true

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DLL

Imports

api-ms-win-crt-private-l1-1-0

_o__initialize_narrow_environment
_o__initialize_onexit_table
_o__invalid_parameter_noinfo
_o__invalid_parameter_noinfo_noreturn
_o__purecall
_o__register_onexit_function
_o__seh_filter_dll
_o_abort
_o_calloc
_o_free
_o_malloc
_o_terminate
_o_wcscpy_s
_o__execute_onexit_table
_o__errno
_o__crt_atexit
_o__configure_narrow_argv
_o__cexit
_o__callnewh
_o___stdio_common_vswprintf
_o___stdio_common_vsnprintf_s
_o___std_exception_destroy
_o___std_exception_copy
_o____lc_codepage_func

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

LoadResource
GetModuleFileNameA
DisableThreadLibraryCalls
GetModuleHandleExW
LoadLibraryExW
GetProcAddress
GetModuleHandleW
FreeLibrary

api-ms-win-core-featurestaging-l1-1-0

UnsubscribeFeatureStateChangeNotification
GetFeatureEnabledState
RecordFeatureUsage
SubscribeFeatureStateChangeNotification

api-ms-win-core-synch-l1-1-0

LeaveCriticalSection
WaitForSingleObject
DeleteCriticalSection
EnterCriticalSection
ReleaseMutex
ReleaseSemaphore
CreateSemaphoreExW
InitializeCriticalSectionEx
OpenSemaphoreW
WaitForSingleObjectEx
AcquireSRWLockExclusive
InitializeCriticalSectionAndSpinCount
ReleaseSRWLockExclusive
CreateMutexExW

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

GetProcessHeap
HeapAlloc
HeapFree

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

SetLastError
RaiseException
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetLastError

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

CreateThreadpoolTimer
SetThreadpoolTimer
CloseThreadpoolTimer
WaitForThreadpoolTimerCallbacks

api-ms-win-core-processthreads-l1-1-0

TlsFree
TlsGetValue
TlsAlloc
GetCurrentProcess
GetCurrentThreadId
GetCurrentProcessId
TlsSetValue
TerminateProcess

api-ms-win-core-localization-l1-2-0

FormatMessageA
FormatMessageW

api-ms-win-core-debug-l1-1-0

DebugBreak
IsDebuggerPresent
OutputDebugStringW

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

CloseHandle

api-ms-win-core-com-l1-1-0

CoTaskMemAlloc
CoTaskMemFree

api-ms-win-core-processenvironment-l1-1-0

ExpandEnvironmentStringsW

api-ms-win-core-file-l1-1-0

GetFileAttributesExW
CreateFileW
GetFileSizeEx

api-ms-win-core-wow64-l1-1-1

IsWow64Process2

api-ms-win-core-rtlsupport-l1-1-0

RtlLookupFunctionEntry
RtlCaptureContext
RtlVirtualUnwind
RtlUnwindEx
RtlPcToFileHeader

api-ms-win-core-util-l1-1-0

EncodePointer

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

InitializeSListHead
InterlockedFlushSList

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

IsProcessorFeaturePresent

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

QueryPerformanceCounter

api-ms-win-core-sysinfo-l1-1-0

GetSystemTimeAsFileTime
GetSystemDirectoryW

api-ms-win-core-file-l1-2-2

AreFileApisANSI

api-ms-win-core-file-l2-1-0

GetFileInformationByHandleEx

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

WideCharToMultiByte

api-ms-win-core-heap-l2-1-0

LocalFree

api-ms-win-crt-string-l1-1-0

wcsncmp
memset

api-ms-win-crt-runtime-l1-1-0

_initterm
_initterm_e

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

EventWriteTransfer

api-ms-win-core-memory-l1-1-0

CreateFileMappingW
UnmapViewOfFile
MapViewOfFileEx

api-ms-win-core-version-l1-1-0

VerQueryValueW
GetFileVersionInfoSizeExW
GetFileVersionInfoExW

api-ms-win-core-libraryloader-l1-2-1

FindResourceW

Exports

Exports

DllMain
GeneralizeForImaging
WUServiceMain

Sections

.text
Size: 81KB - Virtual size: 80KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 33KB - Virtual size: 32KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 2KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 4KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 256B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 2KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 1024B - Virtual size: 708B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

c4bb93c3d76b141925f419e5bb266fe0

Code Sign

33:00:00:03:3b:65:5f:ae:fa:db:75:e9:d6:00:00:00:00:03:3bCertificate

Extended Key Usages

61:07:76:56:00:00:00:00:00:08Certificate

Key Usages

78:05:c0:66:5d:b1:60:15:b4:2b:7a:07:dd:6d:3a:a3:8d:6c:d4:22:b9:53:a2:8f:89:44:54:0a:31:8f:31:f1Signer

Headers

DLL Characteristics

File Characteristics

Imports

api-ms-win-crt-private-l1-1-0

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

api-ms-win-core-featurestaging-l1-1-0

api-ms-win-core-synch-l1-1-0

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

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

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

api-ms-win-core-processthreads-l1-1-0

api-ms-win-core-localization-l1-2-0

api-ms-win-core-debug-l1-1-0

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

api-ms-win-core-com-l1-1-0

api-ms-win-core-processenvironment-l1-1-0

api-ms-win-core-file-l1-1-0

api-ms-win-core-wow64-l1-1-1

api-ms-win-core-rtlsupport-l1-1-0

api-ms-win-core-util-l1-1-0

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

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

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

api-ms-win-core-sysinfo-l1-1-0

api-ms-win-core-file-l1-2-2

api-ms-win-core-file-l2-1-0

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

api-ms-win-core-heap-l2-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-runtime-l1-1-0

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

api-ms-win-core-memory-l1-1-0

api-ms-win-core-version-l1-1-0

api-ms-win-core-libraryloader-l1-2-1

Exports

Exports

Sections

.text Size: 81KB - Virtual size: 80KB

.rdata Size: 33KB - Virtual size: 32KB

.data Size: 2KB - Virtual size: 5KB

.pdata Size: 4KB - Virtual size: 4KB

_RDATA Size: 512B - Virtual size: 256B

.rsrc Size: 2KB - Virtual size: 1KB

.reloc Size: 1024B - Virtual size: 708B

33:00:00:03:3b:65:5f:ae:fa:db:75:e9:d6:00:00:00:00:03:3b
Certificate

61:07:76:56:00:00:00:00:00:08
Certificate

78:05:c0:66:5d:b1:60:15:b4:2b:7a:07:dd:6d:3a:a3:8d:6c:d4:22:b9:53:a2:8f:89:44:54:0a:31:8f:31:f1
Signer

.text
Size: 81KB - Virtual size: 80KB

.rdata
Size: 33KB - Virtual size: 32KB

.data
Size: 2KB - Virtual size: 5KB

.pdata
Size: 4KB - Virtual size: 4KB

_RDATA
Size: 512B - Virtual size: 256B

.rsrc
Size: 2KB - Virtual size: 1KB

.reloc
Size: 1024B - Virtual size: 708B