sihost[.]exe | Triage

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General

Target

sihost.exe
Size

144KB
MD5

bc2f69b48bd06db1f732058a0d514d8d
SHA1

dc3ead4fef204e738b4dfd0a7639722cb50e0ac4
SHA256

f45ea32b042cbd1323a7e2b9eb2ba03b61e34d0543ee1a8b165e080fc4156016
SHA512

0b91df32f4a4ce842bb22f95e32a6e28dbfd94a82573068652410554c308cb7ec447d32fac1fc4b06ea9dad2d1aabe7177ae59b520d673e4f3b9f7c8d6ac78da
SSDEEP

3072:co7QlIDwU98vkR2lSFryPsqB51HQbwwMD3jcn9SD7lbTDG/:xMlIUYckR48ryPsM1HQbwwMD3In9SDhq

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
sihost.exe

Files

sihost.exe
.exe windows:10 windows x64 arch:x64

416ee26cb8c768f6662ac36c7d016457

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB Paths

sihost.pdb

Imports

msvcp_win

?_Xlength_error@std@@YAXPEBD@Z

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

_initterm
_c_exit
_initterm_e
_register_thread_local_exe_atexit_callback

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

_o__configthreadlocale
_o__configure_wide_argv
_o__crt_atexit
_o__errno
_o__exit
_o__get_wide_winmain_command_line
_o__initialize_onexit_table
_o__initialize_wide_environment
_o__invalid_parameter_noinfo
_o__invalid_parameter_noinfo_noreturn
_o__purecall
_o__register_onexit_function
_o__seh_filter_exe
_o__set_app_type
_o__set_fmode
_o__set_new_mode
memmove
_o__cexit
_o_exit
_o_free
_o_malloc
_o_terminate
__C_specific_handler
__current_exception
__current_exception_context
__CxxFrameHandler3
_CxxThrowException
_o__callnewh
_o___stdio_common_vsnprintf_s
_o___std_exception_destroy
_o___std_exception_copy
_o___p__commode
wcsrchr
__std_terminate
__CxxFrameHandler4
memcmp
_o___stdio_common_vswprintf
memcpy

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

memset

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

GetProcAddress
GetModuleFileNameW
GetModuleFileNameA
GetModuleHandleExW
GetModuleHandleW

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

Sleep
InitOnceBeginInitialize
InitOnceComplete

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

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

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

HeapAlloc
HeapFree
HeapSetInformation
GetProcessHeap

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

SetUnhandledExceptionFilter
GetLastError
UnhandledExceptionFilter
SetLastError

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

EventWriteTransfer
EventRegister
EventActivityIdControl
EventSetInformation
EventUnregister

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

CreateThread
SetProcessShutdownParameters
GetCurrentProcess
TerminateProcess
GetCurrentProcessId
GetStartupInfoW
GetCurrentThreadId

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

FormatMessageW

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

IsDebuggerPresent
DebugBreak
OutputDebugStringW

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

CloseHandle

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

CoInitializeSecurity
CoTaskMemAlloc
CoUninitialize
CoInitializeEx
CoGetApartmentType
CoCreateInstance
CoTaskMemFree
CoGetMalloc
CoTaskMemRealloc
CoRegisterClassObject
StringFromGUID2
CoRevokeClassObject
CoCreateFreeThreadedMarshaler

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

LocalAlloc
LocalFree

api-ms-win-security-sddl-l1-1-0

ConvertStringSecurityDescriptorToSecurityDescriptorW

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

WaitForMultipleObjects

coremessaging

CoreUICreate

api-ms-win-core-winrt-error-l1-1-0

RoOriginateError

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

WaitForThreadpoolTimerCallbacks
CloseThreadpoolTimer
SetThreadpoolTimer
CreateThreadpoolTimer

api-ms-win-security-base-l1-1-0

GetSecurityDescriptorDacl
GetLengthSid
CopySid
MakeAbsoluteSD
SetSecurityDescriptorDacl
GetTokenInformation

api-ms-win-security-trustee-l1-1-0

BuildTrusteeWithSidW

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

SetEntriesInAclW

ntdll

NtSetInformationProcess

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

RegGetValueW

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

K32GetModuleFileNameExW

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

RtlLookupFunctionEntry
RtlVirtualUnwind
RtlCaptureContext

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

IsProcessorFeaturePresent

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

QueryPerformanceCounter

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

GetSystemTimeAsFileTime

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

InitializeSListHead

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

ApiSetQueryApiSetPresence

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

ResolveDelayLoadedAPI

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

DelayLoadFailureHook

Sections

.text
Size: 84KB - Virtual size: 82KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 32KB - Virtual size: 30KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 4KB - Virtual size: 3KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 8KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didat
Size: 4KB - Virtual size: 40B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 4KB - Virtual size: 1024B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 4KB - Virtual size: 784B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

416ee26cb8c768f6662ac36c7d016457

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcp_win

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

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

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

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

api-ms-win-core-synch-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-eventing-provider-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

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

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

api-ms-win-security-sddl-l1-1-0

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

coremessaging

api-ms-win-core-winrt-error-l1-1-0

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

api-ms-win-security-base-l1-1-0

api-ms-win-security-trustee-l1-1-0

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

ntdll

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

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

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

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

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

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

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

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

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

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

Sections

.text Size: 84KB - Virtual size: 82KB

.rdata Size: 32KB - Virtual size: 30KB

.data Size: 4KB - Virtual size: 3KB

.pdata Size: 8KB - Virtual size: 5KB

.didat Size: 4KB - Virtual size: 40B

.rsrc Size: 4KB - Virtual size: 1024B

.reloc Size: 4KB - Virtual size: 784B

.text
Size: 84KB - Virtual size: 82KB

.rdata
Size: 32KB - Virtual size: 30KB

.data
Size: 4KB - Virtual size: 3KB

.pdata
Size: 8KB - Virtual size: 5KB

.didat
Size: 4KB - Virtual size: 40B

.rsrc
Size: 4KB - Virtual size: 1024B

.reloc
Size: 4KB - Virtual size: 784B