clrjit[.]dll | Triage

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General

Target

clrjit.dll
Size

1.1MB
MD5

18b23172da47e6cc379e9d6ec1ed54bc
SHA1

11bd02ab80b8d4bb27b2fa72a06dfe66bf873d19
SHA256

6275d0d29e5069c8d54a38e5def84243defa99c59de9917ad201c83c0d30a74b
SHA512

dd36608adc1c10fe2208dee895e310f0db2b29a1a5c402924e9ead392990a0ea530195c04e4724ec5b8a3dcb146686152762545a92fcec0ddd47830a980ccfaa
SSDEEP

24576:DccYcdZgKWXf3e1CvAi2IlmB9ntMBKceJJmh5r2WPwvLeFpXNVw4C:fXdZgHXfTG9tMBleafrFpXbw4C

Score

1^/10

Malware Config

Signatures

Files

clrjit.dll
.dll windows:6 windows x86 arch:x86

73a3ef33b6fa5503d5dc4f6ad1cd2ea8

Code Sign

33:00:00:01:87:72:17:72:15:59:40:c7:09:00:00:00:00:01:87
Certificate

Issuer

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

Not Before

04-03-2020 18:39

Not After

03-03-2021 18:39

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

73:f6:42:e1:2b:4e:b7:b1:af:09:25:a5:e5:bb:03:ab:4a:b1:7a:03:84:8b:7e:c1:dd:d3:ca:7b:38:c2:1b:95
Signer

Actual PE Digest

73:f6:42:e1:2b:4e:b7:b1:af:09:25:a5:e5:bb:03:ab:4a:b1:7a:03:84:8b:7e:c1:dd:d3:ca:7b:38:c2:1b:95

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

D:\workspace\_work\1\s\artifacts\obj\coreclr\Windows_NT.x86.Release\src\jit\standalone\Release\clrjit.pdb

Imports

kernel32

QueryPerformanceFrequency
QueryPerformanceCounter
DisableThreadLibraryCalls
InitializeCriticalSection
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
QueryThreadCycleTime
GetCurrentThread
HeapFree
GetLastError
GetCurrentThreadId
GetSystemTimeAsFileTime
FreeLibrary
SetLastError
LoadLibraryExW
OutputDebugStringA
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetCurrentProcess
TerminateProcess
IsProcessorFeaturePresent
GetCurrentProcessId
InitializeSListHead
IsDebuggerPresent
RtlUnwind
InterlockedFlushSList
EncodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetProcAddress
WideCharToMultiByte
DebugBreak
RaiseException

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

_libm_sse2_sqrt_precise
_CIfmod
_libm_sse2_sin_precise
ceil
floor
_isnan
_fdopen
_libm_sse2_cos_precise
_copysign
_finite

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

fseek
ftell
_fileno
_dup
_setmode
setvbuf
__stdio_common_vfprintf
fclose
__acrt_iob_func
_wfopen

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

qsort

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

_initialize_narrow_environment
_errno
abort
terminate
_cexit
_execute_onexit_table
_initialize_onexit_table
_configure_narrow_argv
_seh_filter_dll
_initterm_e
_initterm

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

strncmp
strcpy_s
wcsncmp
strcat_s

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

calloc
free
malloc

Exports

Exports

getJit
jitStartup

Sections

.text
Size: 961KB - Virtual size: 961KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 95KB - Virtual size: 94KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 8KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 23KB - Virtual size: 23KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

73a3ef33b6fa5503d5dc4f6ad1cd2ea8

Code Sign

33:00:00:01:87:72:17:72:15:59:40:c7:09:00:00:00:00:01:87Certificate

Extended Key Usages

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

Key Usages

73:f6:42:e1:2b:4e:b7:b1:af:09:25:a5:e5:bb:03:ab:4a:b1:7a:03:84:8b:7e:c1:dd:d3:ca:7b:38:c2:1b:95Signer

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-utility-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: 961KB - Virtual size: 961KB

.rdata Size: 95KB - Virtual size: 94KB

.data Size: 512B - Virtual size: 8KB

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

.reloc Size: 23KB - Virtual size: 23KB

33:00:00:01:87:72:17:72:15:59:40:c7:09:00:00:00:00:01:87
Certificate

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

73:f6:42:e1:2b:4e:b7:b1:af:09:25:a5:e5:bb:03:ab:4a:b1:7a:03:84:8b:7e:c1:dd:d3:ca:7b:38:c2:1b:95
Signer

.text
Size: 961KB - Virtual size: 961KB

.rdata
Size: 95KB - Virtual size: 94KB

.data
Size: 512B - Virtual size: 8KB

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

.reloc
Size: 23KB - Virtual size: 23KB