coreclr[.]dll | Triage

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General

Target

coreclr.dll
Size

4.1MB
MD5

78ef03c25e5c4b59d4a29056acf03a14
SHA1

09fa3ed68181598efe79a2f6237ff5bc400a18f4
SHA256

143c9857fedf8eedb98457e1deae8b06c57235b8c90e10e8de648d728be65135
SHA512

5c2dc94424eb9d0dce3a5c4d55cecac626317044f7f07711ee545dde3bbf7c1357185e1b77c9a6dcadc49986bcceb02a068f0f48c7ad8863d33d8fdae8836034
SSDEEP

49152:lruf1rHVd1RIDvJ4wOKUDEu6idNhTyQJd6fTfKppBbqZoY0qSr/JaHJZdfZDZiGI:lyZ7MDhGKMEu6xQJd6rKppBbq/ODJAJs

Score

1^/10

Malware Config

Signatures

Files

coreclr.dll
.dll windows:6 windows x86 arch:x86

4eb21b8edb3393667c593adecc22a5f2

Code Sign

33:00:00:01:52:9b:40:9f:50:56:99:75:88:00:00:00:00:01:52
Certificate

Issuer

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

02/05/2019, 21:37

Not After

02/05/2020, 21:37

Subject

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

Extended Key Usages

ExtKeyUsageCodeSigning

61:0e:90:d2:00:00:00:00:00:03
Certificate

Issuer

CN=Microsoft Root Certificate Authority 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Not Before

08/07/2011, 20:59

Not After

08/07/2026, 21:09

Subject

CN=Microsoft Code Signing PCA 2011,O=Microsoft Corporation,L=Redmond,ST=Washington,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

5f:51:87:df:c7:20:b8:dd:fd:54:24:1c:1e:f3:da:1b:af:7d:37:c3:c8:74:76:b2:b8:09:bb:41:69:ed:bd:27
Signer

Actual PE Digest

5f:51:87:df:c7:20:b8:dd:fd:54:24:1c:1e:f3:da:1b:af:7d:37:c3:c8:74:76:b2:b8:09:bb:41:69:ed:bd:27

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_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

F:\workspace\_work\1\s\bin\obj\Windows_NT.x86.Release\src\dlls\mscoree\coreclr\Release\coreclr.pdb

Imports

kernel32

IsDBCSLeadByte
WideCharToMultiByte
FormatMessageW
LocalFree
GetCurrentThreadId
GetSystemTimeAsFileTime
RaiseException
FreeLibrary
GetCurrentProcessId
OutputDebugStringW
IsDebuggerPresent
GetProcAddress
DebugBreak
RaiseFailFastException
CloseHandle
GetSystemInfo
VirtualAllocExNuma
GetNumaProcessorNodeEx
GetNumaHighestNodeNumber
SetThreadGroupAffinity
GetSystemTimes
GetProcessAffinityMask
GetCurrentProcess
SwitchToThread
FlushInstructionCache
GetCurrentThread
VerSetConditionMask
VerifyVersionInfoW
TerminateProcess
IsWow64Process
GetEnvironmentStringsW
FreeEnvironmentStringsW
SetErrorMode
CreateProcessW
GetCPInfo
WaitForSingleObject
CreateFileMappingW
GetFileSize
GlobalMemoryStatusEx
HeapAlloc
GetProcessHeap
HeapFree
ReleaseMutex
SetEvent
ReleaseSemaphore
WaitForMultipleObjectsEx
CreateMutexW
CreateEventW
CreateSemaphoreExW
OpenProcess
GetModuleHandleW
GetTickCount
SetConsoleCtrlHandler
CreateThread
GetTickCount64
GetLocaleInfoEx
GetUserDefaultLocaleName
InterlockedPushEntrySList
VirtualAlloc
VirtualFree
VirtualQuery
VirtualProtect
HeapCreate
HeapDestroy
HeapValidate
SleepEx
GetThreadContext
SuspendThread
ResumeThread
SetThreadContext
Sleep
FlushProcessWriteBuffers
QueryPerformanceFrequency
QueryPerformanceCounter
GetACP
QueueUserAPC
WaitForSingleObjectEx
SetThreadPriority
GetThreadPriority
TlsSetValue
TlsAlloc
SignalObjectAndWait
SetThreadStackGuarantee
ResetEvent
CreateIoCompletionPort
GetQueuedCompletionStatus
PostQueuedCompletionStatus
GetModuleHandleExW
SetFilePointer
ReadFile
GetCommandLineW
GetProcessTimes
WriteFile
InterlockedPopEntrySList
UnhandledExceptionFilter
SetUnhandledExceptionFilter
AddVectoredExceptionHandler
RemoveVectoredExceptionHandler
CloseThreadpoolTimer
CreateThreadpoolTimer
SetThreadpoolTimer
GetStdHandle
GetConsoleOutputCP
GetLogicalProcessorInformation
MapViewOfFileEx
UnmapViewOfFile
GetStringTypeExW
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
CreateMemoryResourceNotification
GetActiveProcessorGroupCount
GetActiveProcessorCount
InitializeSListHead
InterlockedFlushSList
ExitProcess
TlsGetValue
RtlUnwind
GetSystemDefaultLCID
GetUserDefaultLCID
GetCurrentProcessorNumber
ReadProcessMemory
OutputDebugStringA
SetEnvironmentVariableW
GetCurrentProcessorNumberEx
SetThreadIdealProcessorEx
GetThreadIdealProcessorEx
GetLargePageMinimum
VirtualUnlock
ResetWriteWatch
GetWriteWatch
SetThreadAffinityMask
IsProcessInJob
QueryInformationJobObject
GetSystemTime
MapViewOfFile
FlushFileBuffers
TzSpecificLocalTimeToSystemTime
FileTimeToSystemTime
SystemTimeToFileTime
GetLocalTime
GetTimeFormatW
GetDateFormatW
IsProcessorFeaturePresent
InitializeCriticalSectionAndSpinCount
EncodePointer
TlsFree
GetFullPathNameW
GetEnvironmentVariableW
GetCurrentDirectoryW
GetModuleFileNameW
CreateDirectoryW
GetFileAttributesExW
GetFileAttributesW
LCMapStringEx
LoadLibraryW
OpenEventW
ExitThread
HeapReAlloc
CreateNamedPipeA
DisconnectNamedPipe
ConnectNamedPipe
CreateFileW
LoadLibraryExW
SetLastError
LoadLibraryExA
MultiByteToWideChar
DuplicateHandle
GetLastError

advapi32

SetKernelObjectSecurity
AdjustTokenPrivileges
LookupPrivilegeValueW
EventRegister
EventWrite
RegEnumValueW
DeregisterEventSource
ReportEventW
RegisterEventSourceW
GetSidSubAuthorityCount
GetSidSubAuthority
GetTokenInformation
OpenProcessToken
SetThreadToken
RevertToSelf
OpenThreadToken
RegQueryValueExW
RegOpenKeyExW
RegCloseKey

ole32

CoCreateGuid
CreateStreamOnHGlobal
CoGetClassObject
CoUnmarshalInterface
CoMarshalInterface
CoGetMarshalSizeMax
CoGetContextToken
CoGetObjectContext
StringFromGUID2
CoReleaseMarshalData
CLSIDFromProgID
IIDFromString
CoTaskMemFree
CoInitializeEx
CoRegisterInitializeSpy
CoUninitialize
CoRevokeInitializeSpy
CoCreateFreeThreadedMarshaler
CoTaskMemAlloc
CoWaitForMultipleHandles

oleaut32

VariantInit
SysAllocStringByteLen
SysStringByteLen
SetErrorInfo
LoadRegTypeLi
SysAllocString
GetErrorInfo
SysFreeString
SysStringLen
SysAllocStringLen
QueryPathOfRegTypeLi
LoadTypeLibEx
SafeArrayGetVartype
VariantChangeType
VariantChangeTypeEx
SafeArrayDestroy
SafeArrayCreateVector
SafeArrayPutElement
SafeArrayGetDim
SafeArrayGetLBound
VariantClear
CreateErrorInfo
VarCyFromDec
SafeArrayAllocDescriptorEx
GetRecordInfoFromTypeInfo
SafeArraySetRecordInfo
SafeArrayAllocData
SafeArrayGetElemsize
SafeArrayGetRecordInfo

user32

LoadStringW

shlwapi

PathFindFileNameW

bcrypt

BCryptOpenAlgorithmProvider
BCryptCloseAlgorithmProvider
BCryptDestroyHash
BCryptFinishHash
BCryptHashData
BCryptCreateHash
BCryptGetProperty

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

strcat_s
strcmp
strlen
strcpy_s
strnlen
_strnicmp
strncpy_s
wcsncpy_s
_wcsicmp
isalpha
wcsncmp
isdigit
strncmp
towlower
wcscat_s
wcsnlen
_stricmp
iswspace
strncat_s
wcsncat_s
iswascii
iswupper
wcsncpy
wcscpy_s
_strdup
towupper

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

_flushall
_putws
__stdio_common_vswprintf_s
__stdio_common_vfwprintf
__stdio_common_vswscanf
__stdio_common_vsprintf_s
_wfopen
fputs
fclose
_wfopen_s
fflush
__acrt_iob_func
__stdio_common_vsnwprintf_s
fopen
fwrite
__stdio_common_vsnprintf_s
__stdio_common_vfprintf

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

_initialize_onexit_table
_initialize_narrow_environment
_errno
_configure_narrow_argv
_initterm_e
_initterm
_crt_atexit
_cexit
terminate
_invalid_parameter_noinfo
abort
_controlfp_s
_execute_onexit_table
_register_onexit_function

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

atoi
_wtoi
atol
strtoul
_wcstoui64
wcstoul
_ltow_s
_itow_s

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

bsearch
ldiv
qsort

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

_libm_sse2_asin_precise
_libm_sse2_atan_precise
_libm_sse2_cos_precise
_libm_sse2_exp_precise
_libm_sse2_log10_precise
_libm_sse2_log_precise
_libm_sse2_pow_precise
_except1
_CItanh
__libm_sse2_acos
__libm_sse2_asin
_libm_sse2_sqrt_precise
_libm_sse2_tan_precise
ceil
floor
__libm_sse2_atan
_libm_sse2_acos_precise
__libm_sse2_sin
__libm_sse2_pow
_CIsinh
_CIfmod
_CIatan2
_CIcosh
_libm_sse2_sin_precise
asinh
__libm_sse2_atan2
cbrt
ilogb
acosh
scalbn
fma
atanh
log2
log2f
scalbnf
acoshf
cbrtf
__libm_sse2_cos
atanhf
modf
_copysign
ilogbf
fmaf
asinhf
_isnan
__libm_sse2_exp
__libm_sse2_log
__libm_sse2_tan
__libm_sse2_log10

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

_time64

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

_wsplitpath_s
_wmakepath_s

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

calloc
free
malloc

Exports

Exports

CLRJitAttachState
GetCLRRuntimeHost
GetMetaDataInternalInterface
GetMetaDataInternalInterfaceFromPublic
GetMetaDataPublicInterfaceFromInternal
MetaDataGetDispenser
coreclr_create_delegate
coreclr_execute_assembly
coreclr_initialize
coreclr_shutdown
coreclr_shutdown_2
g_CLREngineMetrics

Sections

.text
Size: 3.3MB - Virtual size: 3.3MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.CLR_UEF
Size: 512B - Virtual size: 65B

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 645KB - Virtual size: 644KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 11KB - Virtual size: 54KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.didat
Size: 512B - Virtual size: 68B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

_RDATA
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 212KB - Virtual size: 212KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

4eb21b8edb3393667c593adecc22a5f2

Code Sign

33:00:00:01:52:9b:40:9f:50:56:99:75:88:00:00:00:00:01:52Certificate

Extended Key Usages

61:0e:90:d2:00:00:00:00:00:03Certificate

Key Usages

5f:51:87:df:c7:20:b8:dd:fd:54:24:1c:1e:f3:da:1b:af:7d:37:c3:c8:74:76:b2:b8:09:bb:41:69:ed:bd:27Signer

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

advapi32

ole32

oleaut32

user32

shlwapi

bcrypt

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

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-crt-utility-l1-1-0

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

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

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

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

Exports

Exports

Sections

.text Size: 3.3MB - Virtual size: 3.3MB

.CLR_UEF Size: 512B - Virtual size: 65B

.rdata Size: 645KB - Virtual size: 644KB

.data Size: 11KB - Virtual size: 54KB

.didat Size: 512B - Virtual size: 68B

_RDATA Size: 1KB - Virtual size: 1KB

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

.reloc Size: 212KB - Virtual size: 212KB

33:00:00:01:52:9b:40:9f:50:56:99:75:88:00:00:00:00:01:52
Certificate

61:0e:90:d2:00:00:00:00:00:03
Certificate

5f:51:87:df:c7:20:b8:dd:fd:54:24:1c:1e:f3:da:1b:af:7d:37:c3:c8:74:76:b2:b8:09:bb:41:69:ed:bd:27
Signer

.text
Size: 3.3MB - Virtual size: 3.3MB

.CLR_UEF
Size: 512B - Virtual size: 65B

.rdata
Size: 645KB - Virtual size: 644KB

.data
Size: 11KB - Virtual size: 54KB

.didat
Size: 512B - Virtual size: 68B

_RDATA
Size: 1KB - Virtual size: 1KB

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

.reloc
Size: 212KB - Virtual size: 212KB