MrmCoreR[.]dll

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General

Target

MrmCoreR.dll
Size

850KB
MD5

e50cb1075e2b56754d0e52f264dc8e31
SHA1

38600828ee1cce57ea631f503daed444f6905361
SHA256

5ad5bd48d58c9f64022994de8199e7bf4aedb64662037c1c79819336d39a545c
SHA512

1abe74e6452dcc01646cc830a913a41c2fb301c35aae9436232bc7699dd0d23ff2911e6deeeac62e35d3d3e4790116269140e83971db8638e10abe0994c68ed7
SSDEEP

24576:hyjuZ9Ov2TrR3jRD4nASHviL6DqC/rf4WveyBf2Jk:88jrRCvmypqk

Score

1^/10

Malware Config

Signatures

Files

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

e9b92570926e7b919f56524abf99cbcd

Code Sign

33:00:00:02:66:bd:15:80:ef:a7:5c:d6:d3:00:00:00:00:02:66
Certificate

Issuer

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

Not Before

04/03/2020, 18:30

Not After

03/03/2021, 18:30

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

c7:95:3f:fd:d9:4f:70:7d:dd:da:f9:f9:ce:61:a9:73:2d:0c:6a:e2:be:d4:9a:34:42:e2:b0:dc:d2:c8:16:30
Signer

Actual PE Digest

c7:95:3f:fd:d9:4f:70:7d:dd:da:f9:f9:ce:61:a9:73:2d:0c:6a:e2:be:d4:9a:34:42:e2:b0:dc:d2:c8:16:30

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

msvcrt

??0exception@@QAE@XZ
_lock
_ftol2
free
iswspace
__dllonexit
_vsnwprintf
_onexit
__CxxFrameHandler3
wcsrchr
_amsg_exit
malloc
memcpy
_callnewh
?terminate@@YAXXZ
iswalnum
wcschr
_itow_s
??1type_info@@UAE@XZ
_except_handler4_common
?what@exception@@UBEPBDXZ
_wtoi
??1exception@@UAE@XZ
_initterm
_purecall
_CxxThrowException
memmove_s
_wcsicmp
_XcptFilter
memcmp
wcsncmp
_ftol2_sse
_unlock
??0exception@@QAE@ABV0@@Z
wprintf
memcpy_s
iswdigit
towupper
isalpha
_ui64tow_s
qsort_s
_wcsnicmp
wcsncpy_s
towlower
qsort
wcsnlen
wcscpy_s
memmove
_wtof
wcstoul
_wcstoi64
_vsnprintf_s
??0exception@@QAE@ABQBD@Z
bsearch
memset

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

_GetMUIStringFromCache
_OpenMuiStringCache
_AddMUIStringToCache

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

ApiSetQueryApiSetPresence

rpcrt4

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

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

EventUnregister
EventRegister
EventWrite

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

DecodePointer
EncodePointer

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

ReleaseSRWLockExclusive
AcquireSRWLockExclusive
InitializeCriticalSection
CreateEventExW
InitializeSRWLock
ReleaseSRWLockShared
SetEvent
InitOnceExecuteOnce
Sleep
CreateSemaphoreExW
EnterCriticalSection
DeleteCriticalSection
WaitForSingleObject
CreateEventW
AcquireSRWLockShared
SignalObjectAndWait
ReleaseSemaphore
ReleaseMutex
WaitForSingleObjectEx
OpenSemaphoreW
LeaveCriticalSection
CreateMutexExW

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

HeapAlloc
GetProcessHeap
HeapFree

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

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

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

GetSystemTimeAsFileTime
GetTickCount
GetSystemTime
GetSystemWindowsDirectoryW

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

SetUnhandledExceptionFilter
UnhandledExceptionFilter
RaiseException
GetLastError
SetLastError

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

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

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

GetCurrentThread
TerminateProcess
GetCurrentProcessId
GetCurrentThreadId
OpenThreadToken
OpenProcessToken
TlsSetValue
OpenProcess
GetCurrentProcess
TlsAlloc
CreateThread
TlsFree
TlsGetValue

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

QueryPerformanceCounter

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

GetModuleFileNameA
FindStringOrdinal
FreeLibraryAndExitThread
GetModuleHandleExW
GetProcAddress
GetModuleHandleW
FreeLibrary

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

CompareStringOrdinal
CompareStringEx

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

CloseHandle

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

GetEnvironmentVariableW

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

UnmapViewOfFile
MapViewOfFile
CreateFileMappingW

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

LocalFree

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

SystemTimeToFileTime

ntdll

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

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

OutputDebugStringW
DebugBreak

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

RegGetValueW
RegOpenKeyExW
RegCloseKey
RegNotifyChangeKeyValue
RegDeleteValueW
RegCreateKeyExW
RegSetValueExW

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

GetUserGeoID
GetGeoInfoW
GetThreadPreferredUILanguages
FormatMessageW

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

LoadLibraryW

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

FreeLibraryWhenCallbackReturns
CreateThreadpoolTimer
SetThreadpoolTimer
CloseThreadpoolTimer
CallbackMayRunLong
WaitForThreadpoolTimerCallbacks
TrySubmitThreadpoolCallback

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

CreateSemaphoreW

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

DelayLoadFailureHook
ResolveDelayLoadedAPI

Exports

Exports

DllCanUnloadNow
DllGetActivationFactory
DllGetClassObject
GetInternalReferenceBlobForManifestValue
GetMergedSystemPri
GetStringValueForManifestField
MergeResourcePackPri
MergeSystemPriFiles
ResourceManagerQueueGetCurrentDepth
ResourceManagerQueueGetString
ResourceManagerQueueGetStringDirect
ResourceManagerQueueIsResourceReference
ResourceManagerQueueReset

Sections

.text
Size: 746KB - Virtual size: 746KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 6KB - Virtual size: 7KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 8KB - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 1024B - Virtual size: 576B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 9B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 20KB - Virtual size: 20KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 50KB - Virtual size: 50KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

e9b92570926e7b919f56524abf99cbcd

Code Sign

33:00:00:02:66:bd:15:80:ef:a7:5c:d6:d3:00:00:00:00:02:66Certificate

Extended Key Usages

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

Key Usages

c7:95:3f:fd:d9:4f:70:7d:dd:da:f9:f9:ce:61:a9:73:2d:0c:6a:e2:be:d4:9a:34:42:e2:b0:dc:d2:c8:16:30Signer

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

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

api-ms-win-core-apiquery-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-heap-l1-2-0

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

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

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

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

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

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

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

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

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

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

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

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

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

ntdll

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

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

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

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

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

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

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

Exports

Exports

Sections

.text Size: 746KB - Virtual size: 746KB

.data Size: 6KB - Virtual size: 7KB

.idata Size: 8KB - Virtual size: 8KB

.didat Size: 1024B - Virtual size: 576B

.tls Size: 512B - Virtual size: 9B

.rsrc Size: 20KB - Virtual size: 20KB

.reloc Size: 50KB - Virtual size: 50KB

33:00:00:02:66:bd:15:80:ef:a7:5c:d6:d3:00:00:00:00:02:66
Certificate

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

c7:95:3f:fd:d9:4f:70:7d:dd:da:f9:f9:ce:61:a9:73:2d:0c:6a:e2:be:d4:9a:34:42:e2:b0:dc:d2:c8:16:30
Signer

.text
Size: 746KB - Virtual size: 746KB

.data
Size: 6KB - Virtual size: 7KB

.idata
Size: 8KB - Virtual size: 8KB

.didat
Size: 1024B - Virtual size: 576B

.tls
Size: 512B - Virtual size: 9B

.rsrc
Size: 20KB - Virtual size: 20KB

.reloc
Size: 50KB - Virtual size: 50KB