clrjit[.]dll | Triage

Sharing

Copy URL Twitter E-mail

General

Target

clrjit.dll
Size

1.4MB
MD5

01289cc6b6a5354d4f0c4846607bb609
SHA1

d573e82f83656b92efceafcbc0c8ccfa69c7396a
SHA256

b4ff88246ac1f904f03fec68227170d39c6245491e5eabaab3373bea970bec65
SHA512

f3667b602a2ab12215b8335ae1edfa07b18ba7b57e98377642772459e6513f8264c5ab7ace53ecb03ea13f79523ea0524e136678090215d0b632ccbfc3822e6e
SSDEEP

24576:KuJbL6SYhyDvgQWRaotB5UR6Bbi1sE6amDj8rM/sfstkX/QPo8PVD0GxiOpY+OoU:KuJbOLrMOB5O6Byv6xDj8I/iLX/Qg8Pe

Score

1^/10

Malware Config

Signatures

Files

clrjit.dll
.dll windows:6 windows x64 arch:x64

49de661d6e15395302bd76ca71f37164

Code Sign

33:00:00:03:05:4d:62:0d:68:85:07:aa:33:00:00:00:00:03:05
Certificate

Issuer

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

Not Before

04/08/2022, 20:23

Not After

03/08/2023, 20:23

Subject

CN=.NET,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

11:17:ff:a3:b5:bb:b6:b5:82:81:f6:79:70:11:50:38:87:45:40:d3:00:d4:81:65:db:0a:2b:d9:b5:56:fd:09
Signer

Actual PE Digest

11:17:ff:a3:b5:bb:b6:b5:82:81:f6:79:70:11:50:38:87:45:40:d3:00:d4:81:65:db:0a:2b:d9:b5:56:fd:09

Digest Algorithm

sha256

PE Digest Matches

true

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
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_DLL

PDB Paths

D:\a\_work\1\s\artifacts\obj\coreclr\windows.x64.Release\jit\clrjit.pdb

Imports

kernel32

RaiseException
DebugBreak
OutputDebugStringA
WideCharToMultiByte
QueryPerformanceFrequency
QueryPerformanceCounter
DisableThreadLibraryCalls
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
HeapFree
QueryThreadCycleTime
GetCurrentThread
GetLastError
CloseHandle
UnmapViewOfFile
GetCurrentThreadId
GetSystemTimeAsFileTime
FreeLibrary
SetLastError
LoadLibraryExW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
InitializeCriticalSectionAndSpinCount
SetEvent
ResetEvent
WaitForSingleObjectEx
CreateEventW
GetModuleHandleW
GetProcAddress
IsDebuggerPresent
GetCurrentProcessId
InitializeSListHead
RtlUnwindEx
InterlockedFlushSList
EncodePointer
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
RtlPcToFileHeader

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

sinhf
sinh
sinf
sin
powf
pow
tanhf
_fdopen
logf
log10f
log10
log
fmodf
fmod
floorf
floor
expf
exp
coshf
cosh
_copysign
sqrtf
_isnanf
acosh
asinh
atanh
cbrt
log2
acoshf
asinhf
atanhf
cbrtf
log2f
ilogb
ilogbf
_finite
cosf
tan
tanf
cos
ceilf
ceil
atanf
atan2f
atan2
atan
asinf
asin
acosf
acos
sqrt
tanh
_isnan
_copysignf

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

_wfopen
fclose
fseek
ftell
fflush
_fileno
__acrt_iob_func
_dup
setvbuf
__stdio_common_vfprintf
_setmode

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

_wtoi

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

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

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

strcpy_s
_stricmp
strcat_s
strcmp
wcsncmp
strncmp

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

calloc
malloc
free

Exports

Exports

getJit
getLikelyClass
jitStartup

Sections

.text
Size: 1.1MB - Virtual size: 1.1MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 170KB - Virtual size: 169KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 6KB - Virtual size: 15KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 47KB - Virtual size: 47KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

_RDATA
Size: 512B - Virtual size: 252B

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: 3KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

49de661d6e15395302bd76ca71f37164

Code Sign

33:00:00:03:05:4d:62:0d:68:85:07:aa:33:00:00:00:00:03:05Certificate

Extended Key Usages

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

Key Usages

11:17:ff:a3:b5:bb:b6:b5:82:81:f6:79:70:11:50:38:87:45:40:d3:00:d4:81:65:db:0a:2b:d9:b5:56:fd:09Signer

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

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

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

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

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

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

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

Exports

Exports

Sections

.text Size: 1.1MB - Virtual size: 1.1MB

.rdata Size: 170KB - Virtual size: 169KB

.data Size: 6KB - Virtual size: 15KB

.pdata Size: 47KB - Virtual size: 47KB

_RDATA Size: 512B - Virtual size: 252B

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

.reloc Size: 3KB - Virtual size: 3KB

33:00:00:03:05:4d:62:0d:68:85:07:aa:33:00:00:00:00:03:05
Certificate

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

11:17:ff:a3:b5:bb:b6:b5:82:81:f6:79:70:11:50:38:87:45:40:d3:00:d4:81:65:db:0a:2b:d9:b5:56:fd:09
Signer

.text
Size: 1.1MB - Virtual size: 1.1MB

.rdata
Size: 170KB - Virtual size: 169KB

.data
Size: 6KB - Virtual size: 15KB

.pdata
Size: 47KB - Virtual size: 47KB

_RDATA
Size: 512B - Virtual size: 252B

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

.reloc
Size: 3KB - Virtual size: 3KB