MrmCoreR[.]dll

Sharing

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General

Target

MrmCoreR.dll
Size

828KB
MD5

fdb55743462e6398ee35c4fbf33d3d2c
SHA1

b652278b4e9c1c3457ffa3ec75ed2f241c729b61
SHA256

31da654c4a26b235f95bce8cd1f1ed8faae2624b5bdf3d31a840be2db8235b7a
SHA512

99d93f71cafe1e1fd35f7b306936f5e5f00d0c72821266a0087d4c2b24eb52b9c24095caf26a691b2e390ca820b5741cf45fb77144db9534ab5e3bbc689eae61
SSDEEP

24576:PuqCLbq+KLhXK7f/B6ONeKxWskWNkTEofY:mbh9OGkWBofY

Score

1^/10

Malware Config

Signatures

Files

MrmCoreR.dll
.dll windows:10 windows x86 arch:x86

2bb2bc378b42cae81461c5c56c4776df

Code Sign

33:00:00:03:3c:89:c6:6a:7b:45:bb:1f:bd:00:00:00:00:03:3c
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

45:59:b0:f2:89:c2:ef:88:9f:f2:6b:ed:d5:24:f4:b6:dc:01:a2:84:f9:73:22:e3:78:a4:07:46:b5:1a:7c:2a
Signer

Actual PE Digest

45:59:b0:f2:89:c2:ef:88:9f:f2:6b:ed:d5:24:f4:b6:dc:01:a2:84:f9:73:22:e3:78:a4:07:46:b5:1a:7c:2a

Digest Algorithm

sha256

PE Digest Matches

true

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

MrmCoreR.pdb

Imports

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

wcsnlen
wcsncmp
memmove_s
memset

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

_initterm_e
_initterm

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

_o__initialize_narrow_environment
_o__initialize_onexit_table
_o__invalid_parameter_noinfo
_o__itow_s
_o__purecall
_o__register_onexit_function
_o__seh_filter_dll
memmove
_o__ui64tow_s
_o__wcsnicmp
_o__wcstoi64
_o__wtof
_o__wtoi
_o_bsearch
_o_free
_o_isalpha
_o_iswalnum
_o_iswctype
_o_iswdigit
_o_iswspace
_o_malloc
_o_memcpy_s
_o_qsort_s
_o_terminate
_o_towlower
_o_towupper
_o_wcscpy_s
_o_wcsncpy_s
_o_wcstoul
__current_exception
__current_exception_context
_except_handler4_common
_CxxThrowException
_o__cexit
_o__callnewh
_o__crt_atexit
_o___stdio_common_vswprintf
_o___stdio_common_vsnprintf_s
_o___std_type_info_destroy_list
_o___std_exception_destroy
_o___std_exception_copy
_o__configure_narrow_argv
wcsrchr
wcsstr
wcschr
__std_terminate
__CxxFrameHandler3
_o__execute_onexit_table
_o__errno
memcmp
memcpy

kernelbase

GetCurrentPackageResourcesContext
GetCurrentPackageApplicationResourcesContext
OpenGlobalizationUserSettingsKey
GetPackageResourcesProperty
GetCurrentPackageId
PackageIdFromFullName
GetCurrentPackageGlobalizationContext
GetPackageGlobalizationProperty
GetStagedPackagePathByFullName2
GetPackagePathByFullName2
GetCurrentPackageInfo3
GetCurrentPackageInfo2
GetCurrentPackageInfo
AppXGetOSMaxVersionTested
GetSystemMetadataPathForPackage
GetPackagePathByFullName
GetStagedPackageOrigin
GetCurrentPackageFullName
PackageFamilyNameFromFullName
GetPackageStatusForUser
GetCurrentPackageFamilyName
PackageFamilyNameFromId
PackageNameAndPublisherIdFromFamilyName

api-ms-win-core-localization-private-l1-1-0

_AddMUIStringToCache
_OpenMuiStringCache
_GetMUIStringFromCache

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

ApiSetQueryApiSetPresence

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

FindStringOrdinal
GetModuleHandleExW
FreeLibrary
GetModuleFileNameW
LoadLibraryExW
GetModuleFileNameA
GetModuleHandleW
GetProcAddress
GetModuleHandleExA

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

CreateSemaphoreExW
ReleaseSemaphore
WaitForSingleObject
InitializeCriticalSectionEx
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
ReleaseMutex
WaitForSingleObjectEx
InitializeCriticalSectionAndSpinCount
CreateMutexExW
CreateEventExW
OpenSemaphoreW
AcquireSRWLockExclusive
ReleaseSRWLockExclusive
ReleaseSRWLockShared
CreateEventW
InitializeSRWLock
AcquireSRWLockShared
SetEvent
ResetEvent

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

HeapFree
GetProcessHeap
HeapAlloc

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

GetLastError
SetLastError
RaiseException
UnhandledExceptionFilter
SetUnhandledExceptionFilter

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

GetCurrentThread
OpenProcessToken
CreateThread
GetCurrentProcess
TerminateProcess
GetCurrentProcessId
GetCurrentThreadId
OpenThreadToken

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

GetThreadPreferredUILanguages
GetGeoInfoW
GetUserGeoID
FormatMessageW

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

IsDebuggerPresent
DebugBreak
OutputDebugStringW

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

CloseHandle

rpcrt4

RpcStringFreeW
NdrDllCanUnloadNow
UuidToStringW
UuidCreate
NdrDllGetClassObject
CStdStubBuffer_Connect
CStdStubBuffer_Disconnect
CStdStubBuffer_QueryInterface
CStdStubBuffer_CountRefs
NdrCStdStubBuffer2_Release
CStdStubBuffer_Invoke
NdrStubForwardingFunction
NdrStubCall2
NdrCStdStubBuffer_Release
IUnknown_AddRef_Proxy
CStdStubBuffer_DebugServerQueryInterface
NdrOleFree
CStdStubBuffer_IsIIDSupported
IUnknown_QueryInterface_Proxy
CStdStubBuffer_AddRef
IUnknown_Release_Proxy
CStdStubBuffer_DebugServerRelease
NdrOleAllocate

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

EventUnregister
EventSetInformation
EventRegister
EventWriteTransfer

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

EncodePointer
DecodePointer

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

InitOnceExecuteOnce
SignalObjectAndWait

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

GetFileAttributesExW
FindClose
GetFinalPathNameByHandleW
FindFirstFileW
GetFileSizeEx
GetDriveTypeW
DeleteFileW
CreateFileW
CreateDirectoryW
CompareFileTime
WriteFile
FlushFileBuffers
GetTempFileNameW
FindNextFileW
GetFileAttributesW
ReadFile

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

GetSystemTime
GetSystemTimeAsFileTime
GetSystemWindowsDirectoryW

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

RegNotifyChangeKeyValue
RegOpenCurrentUser
RegCloseKey
RegDeleteValueW
RegSetValueExW
RegOpenKeyExW
RegGetValueW
RegCreateKeyExW

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

ObjectStublessClient8
ObjectStublessClient6
NdrProxyForwardingFunction5
NdrProxyForwardingFunction4
ObjectStublessClient16
NdrProxyForwardingFunction3
CStdStubBuffer2_QueryInterface
CStdStubBuffer2_Connect
ObjectStublessClient13
ObjectStublessClient7
CStdStubBuffer2_Disconnect
ObjectStublessClient17
ObjectStublessClient22
ObjectStublessClient3
CStdStubBuffer2_CountRefs
ObjectStublessClient11
ObjectStublessClient14
ObjectStublessClient12
ObjectStublessClient20
ObjectStublessClient23
ObjectStublessClient5
ObjectStublessClient9
ObjectStublessClient19
ObjectStublessClient21
ObjectStublessClient4
ObjectStublessClient15
ObjectStublessClient10
ObjectStublessClient18

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

OpenProcess
IsProcessorFeaturePresent

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

QueryPerformanceCounter

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

InitializeSListHead

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

CompareStringOrdinal
WideCharToMultiByte
MultiByteToWideChar

ntdll

RtlReportException
RtlGetDeviceFamilyInfoEnum
RtlInitializeSRWLock
RtlInitUnicodeString
RtlSubscribeWnfStateChangeNotification
NtQuerySystemInformation
RtlPublishWnfStateData
NtQueryInformationToken
RtlCompareUnicodeString
RtlConvertDeviceFamilyInfoToString
RtlReleaseSRWLockShared
NtQueryWnfStateData
RtlUnsubscribeWnfNotificationWaitForCompletion
RtlReleaseSRWLockExclusive
RtlAcquireSRWLockExclusive
RtlAcquireSRWLockShared
RtlCheckSandboxedToken
NtClose

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

GetEnvironmentVariableW

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

MapViewOfFile
UnmapViewOfFile
CreateFileMappingW

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

SystemTimeToFileTime

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

GetTempPathW

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

LocalFree

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

WaitForThreadpoolTimerCallbacks
CloseThreadpoolTimer
CreateThreadpoolTimer
SetThreadpoolTimer

api-ms-win-core-file-l1-2-4

GetTempPath2W

api-ms-win-shcore-taskpool-l1-1-0

SHTaskPoolAllowThreadReuse
SHTaskPoolQueueTask

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

ResolveDelayLoadedAPI

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

DelayLoadFailureHook

Exports

Exports

DllCanUnloadNow
DllGetActivationFactory
DllGetClassObject
GetInternalReferenceBlobForManifestValue
GetMergedSystemPri
GetMergedSystemPriEx
GetStringValueForManifestField
MergeResourcePackPri
MergeSystemPriFiles
ResourceManagerQueueGetCurrentDepth
ResourceManagerQueueGetGlobalFlags
ResourceManagerQueueGetMrtCachePathForPackage
ResourceManagerQueueGetString
ResourceManagerQueueGetStringDirect
ResourceManagerQueueIsResourceReference
ResourceManagerQueueReset
ResourceManagerQueueSetGlobalFlags
ShouldMergeInproc

Sections

.text
Size: 748KB - Virtual size: 747KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 10KB - Virtual size: 10KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 512B - Virtual size: 504B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 45KB - Virtual size: 44KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

2bb2bc378b42cae81461c5c56c4776df

Code Sign

33:00:00:03:3c:89:c6:6a:7b:45:bb:1f:bd:00:00:00:00:03:3cCertificate

Extended Key Usages

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

Key Usages

45:59:b0:f2:89:c2:ef:88:9f:f2:6b:ed:d5:24:f4:b6:dc:01:a2:84:f9:73:22:e3:78:a4:07:46:b5:1a:7c:2aSigner

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

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

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

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

kernelbase

api-ms-win-core-localization-private-l1-1-0

api-ms-win-core-apiquery-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-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

rpcrt4

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

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

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

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

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

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

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

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

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

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

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

ntdll

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

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

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

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

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

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

api-ms-win-core-file-l1-2-4

api-ms-win-shcore-taskpool-l1-1-0

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

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

Exports

Exports

Sections

.text Size: 748KB - Virtual size: 747KB

.data Size: 4KB - Virtual size: 7KB

.idata Size: 10KB - Virtual size: 10KB

.didat Size: 512B - Virtual size: 504B

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

.reloc Size: 45KB - Virtual size: 44KB

33:00:00:03:3c:89:c6:6a:7b:45:bb:1f:bd:00:00:00:00:03:3c
Certificate

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

45:59:b0:f2:89:c2:ef:88:9f:f2:6b:ed:d5:24:f4:b6:dc:01:a2:84:f9:73:22:e3:78:a4:07:46:b5:1a:7c:2a
Signer

.text
Size: 748KB - Virtual size: 747KB

.data
Size: 4KB - Virtual size: 7KB

.idata
Size: 10KB - Virtual size: 10KB

.didat
Size: 512B - Virtual size: 504B

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

.reloc
Size: 45KB - Virtual size: 44KB