wuauclt[.]exe | Triage

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General

Target

wuauclt.exe
Size

101KB
MD5

879e04f43281c0dce52f219f534d5192
SHA1

91d37deb9c4ab99f91509a94ffe51989512cc6c9
SHA256

dc299b7bcd99376c8288dde776934109c30448f2195e31cbdb3db4c7efac2da2
SHA512

9b0fa44fdebb1d169f188bb2b2cf299354a5a633d5b1dfdf8795983206ab1213cab2f12ca9fa9da8fa48a31434c108f622196d028fc4e8bf8d62163157829a77
SSDEEP

1536:coBLXpRDI14n/d+mcslNwhbMz7lSuDLAIAFODjhg7JhrRvinU1HRPp6zN:ckpQwQNuNwhbM8u/AIAFQQ9xinAR8R

Score

1^/10

Malware Config

Signatures

Files

wuauclt.exe
.exe windows x64

3c09a0f2efaf2544ccaa2a24afe75a58

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

a5:d0:e9:7d:fe:92:e6:53:8b:09:02:ba:37:83:8e:41:5b:15:86:8b:56:40:3a:ab:8a:57:21:9c:dc:b1:ee:dd
Signer

Actual PE Digest

a5:d0:e9:7d:fe:92:e6:53:8b:09:02:ba:37:83:8e:41:5b:15:86:8b:56:40:3a:ab:8a:57:21:9c:dc:b1:ee:dd

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
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

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

_set_fmode
__stdio_common_vsnprintf_s
__p__commode
__stdio_common_vswprintf

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

_cexit
_errno
_exit
_initterm_e
_initterm
_get_wide_winmain_command_line
_initialize_wide_environment
_configure_wide_argv
_register_thread_local_exe_atexit_callback
_set_app_type
_seh_filter_exe
_invalid_parameter_noinfo
_initialize_onexit_table
_register_onexit_function
_crt_atexit
terminate
abort
_c_exit
exit

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

wcstoull
mbstowcs_s

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

CoInitializeEx
CoCreateInstance
CoTaskMemFree
CoUninitialize

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

IsDebuggerPresent
DebugBreak
OutputDebugStringW

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

TlsGetValue
GetCurrentThreadId
TlsAlloc
TlsFree
TerminateProcess
GetCurrentProcessId
GetCurrentProcess
GetStartupInfoW
TlsSetValue

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

GetModuleFileNameA
GetModuleFileNameW
GetModuleHandleExW
GetProcAddress
GetModuleHandleW
LoadLibraryExW
FreeLibrary

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

AcquireSRWLockShared
CreateMutexExW
WaitForSingleObjectEx
ReleaseMutex
ReleaseSRWLockShared
ReleaseSRWLockExclusive
WaitForSingleObject
CreateSemaphoreExW
AcquireSRWLockExclusive
DeleteCriticalSection
ReleaseSemaphore
InitializeCriticalSectionAndSpinCount
OpenSemaphoreW

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

GetProcessHeap
HeapAlloc
HeapFree
HeapSetInformation

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

UnhandledExceptionFilter
RaiseException
SetUnhandledExceptionFilter
GetLastError
SetLastError

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

CloseHandle

rpcrt4

UuidFromStringW

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

GetCommandLineW

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

InitOnceBeginInitialize
Sleep
InitOnceComplete

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

RtlLookupFunctionEntry
RtlCaptureContext
RtlVirtualUnwind
RtlPcToFileHeader
RtlUnwindEx

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

EncodePointer

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

InitializeSListHead

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

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

calloc
free
malloc
_set_new_mode

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

strcpy_s
wcsncmp

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

__setusermatherr

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

_configthreadlocale

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

ResolveDelayLoadedAPI

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

DelayLoadFailureHook

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

CompareStringW

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

RegQueryValueExW
RegCloseKey
RegOpenKeyExW

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

GetNativeSystemInfo

Sections

.text
Size: 58KB - Virtual size: 58KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 25KB - Virtual size: 24KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 1KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 512B - Virtual size: 56B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

_RDATA
Size: 512B - Virtual size: 384B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 448B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

3c09a0f2efaf2544ccaa2a24afe75a58

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

a5:d0:e9:7d:fe:92:e6:53:8b:09:02:ba:37:83:8e:41:5b:15:86:8b:56:40:3a:ab:8a:57:21:9c:dc:b1:ee:ddSigner

Headers

DLL Characteristics

File Characteristics

Imports

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

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

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

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

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

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

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

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-handle-l1-1-0

rpcrt4

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

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

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-crt-heap-l1-1-0

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

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

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

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

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

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

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

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

Sections

.text Size: 58KB - Virtual size: 58KB

.rdata Size: 25KB - Virtual size: 24KB

.data Size: 1KB - Virtual size: 3KB

.pdata Size: 3KB - Virtual size: 2KB

.didat Size: 512B - Virtual size: 56B

_RDATA Size: 512B - Virtual size: 384B

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

.reloc Size: 512B - Virtual size: 448B

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

a5:d0:e9:7d:fe:92:e6:53:8b:09:02:ba:37:83:8e:41:5b:15:86:8b:56:40:3a:ab:8a:57:21:9c:dc:b1:ee:dd
Signer

.text
Size: 58KB - Virtual size: 58KB

.rdata
Size: 25KB - Virtual size: 24KB

.data
Size: 1KB - Virtual size: 3KB

.pdata
Size: 3KB - Virtual size: 2KB

.didat
Size: 512B - Virtual size: 56B

_RDATA
Size: 512B - Virtual size: 384B

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

.reloc
Size: 512B - Virtual size: 448B