sihost[.]exe | Triage

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General

Target

sihost.exe
Size

64KB
MD5

3d19b373362e9cb8ff0733716532a5d1
SHA1

d555134c0dced8d4c4a296f1364deb9adbe9a6e1
SHA256

184f277004805527498f22153607642dc1626b89f3dc72d7009de2add6f4f9ff
SHA512

5beacdffc70ac56e570e9be74d893bff6027217da64eb291a0a2a9e5db177eeca3a1869d0f7e2419ce35d82c12bf3fd8de8eaf2f2235e3ee9b7a004d6a208ae7
SSDEEP

1536:IL+FKOVZaS4s/SkemIRx+UYMfF8NXDTZYz4vE62:2+MOVZaS4s/SLGM0zlYz4M62

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 x86

0cbbe36239cc07e83296da079a1f1059

Headers

DLL Characteristics

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_32BIT_MACHINE

Imports

msvcrt

__set_app_type
??0exception@@QAE@ABV0@@Z
??0exception@@QAE@XZ
exit
_amsg_exit
_exit
free
__p__commode
_XcptFilter
__p__fmode
_wcmdln
malloc
__setusermatherr
_initterm
_except_handler4_common
_controlfp
_callnewh
memcpy
??0exception@@QAE@ABQBD@Z
??1type_info@@UAE@XZ
_onexit
__CxxFrameHandler3
_CxxThrowException
??1exception@@UAE@XZ
?what@exception@@UBEPBDXZ
__dllonexit
_unlock
__wgetmainargs
_vsnprintf_s
_cexit
_lock
?terminate@@YAXXZ
memmove
_purecall
??3@YAXPAX@Z
memcpy_s
_vsnwprintf
??0exception@@QAE@ABQBDH@Z
memcmp
memset

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

LoadLibraryExW
GetModuleHandleA
GetModuleFileNameA
GetProcAddress
GetModuleHandleExW

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

AcquireSRWLockExclusive
CreateSemaphoreExW
ReleaseMutex
InitOnceBeginInitialize
ReleaseSRWLockExclusive
CreateEventW
InitOnceComplete
WaitForSingleObjectEx
OpenSemaphoreW
Sleep
AcquireSRWLockShared
InitializeSRWLock
ReleaseSRWLockShared
CreateMutexExW
ReleaseSemaphore
SetEvent
WaitForSingleObject

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

HeapAlloc
HeapFree
GetProcessHeap

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

GetLastError
SetUnhandledExceptionFilter
SetLastError
UnhandledExceptionFilter

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

EventUnregister
EventSetInformation
EventRegister
EventWriteTransfer
EventActivityIdControl

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

GetStartupInfoW
TerminateProcess
GetCurrentThreadId
GetCurrentProcess
GetCurrentProcessId
CreateThread
SetProcessShutdownParameters

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

FormatMessageW

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

OutputDebugStringW

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

CloseHandle

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

CoInitializeEx
CoUninitialize
CoInitializeSecurity
CoCreateFreeThreadedMarshaler
CoRevokeClassObject
CoRegisterClassObject
CoCreateInstance
CoTaskMemFree

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

api-ms-win-security-base-l1-2-0

GetSecurityDescriptorDacl
SetSecurityDescriptorDacl
GetTokenInformation
GetLengthSid
CopySid
MakeAbsoluteSD

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

BuildTrusteeWithSidW

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

SetEntriesInAclW

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

CreateThreadpoolTimer
SetThreadpoolTimer

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

QueryPerformanceCounter

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

GetTickCount
GetSystemTimeAsFileTime

coremessaging

CoreUICreate

coreuicomponents

CoreUIFactoryCreate
CoreUIServerCreate

Sections

.text
Size: 53KB - Virtual size: 52KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 1024B - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 4KB - Virtual size: 4KB

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

0cbbe36239cc07e83296da079a1f1059

Headers

DLL Characteristics

File Characteristics

Imports

msvcrt

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

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

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

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

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

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

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

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

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

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

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

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

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

api-ms-win-security-base-l1-2-0

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

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

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

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

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

coremessaging

coreuicomponents

Sections

.text Size: 53KB - Virtual size: 52KB

.data Size: 1024B - Virtual size: 1KB

.idata Size: 4KB - Virtual size: 4KB

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

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

.text
Size: 53KB - Virtual size: 52KB

.data
Size: 1024B - Virtual size: 1KB

.idata
Size: 4KB - Virtual size: 4KB

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

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