SMBHelperClass[.]dll

Sharing

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General

Target

SMBHelperClass.dll
Size

82KB
MD5

331e5816980f4e05c6e41228482b26fd
SHA1

c1747ceaba5592eb415a1cd970e82d732e718666
SHA256

8925b3cb92a5c8d0bcabe7ea125d9d1b321f04ac4ca4eb498c97fc5fbd529d8b
SHA512

a60cd702ff94a060ec785b22c9bf3d99f4353581c38ea0393ccf3a71d2e46bb3c42ff1eb4b7e9059efa5c1b3756aa3ee3ed933f165c4dbf6081cb5a5da7a647b
SSDEEP

1536:hFjZ36aeJZIn7AGT+dhcg8qR4IguPDq1qXCZt/7sNnDClA:J3XeIn7AGT+ncg8qRc11qyDoNnD3

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
SMBHelperClass.dll

Files

SMBHelperClass.dll
.dll regsvr32 windows:10 windows x86 arch:x86

21f6b6afcfab21722d268bd3b49d8975

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DLL

PDB Paths

SMBHelperClass.pdb

Imports

msvcrt

wcscat_s
wcscpy_s
vswprintf_s
towlower
??0exception@@QAE@XZ
memmove_s
??0exception@@QAE@ABQBD@Z
?what@exception@@UBEPBDXZ
??0exception@@QAE@ABV0@@Z
_purecall
_wcsnicmp
_wcsicmp
_callnewh
_CxxThrowException
_XcptFilter
_amsg_exit
_initterm
?terminate@@YAXXZ
_except_handler4_common
__CxxFrameHandler3
??1type_info@@UAE@XZ
_itow_s
_errno
??1exception@@UAE@XZ
memcpy_s
free
malloc
realloc
_lock
_unlock
__dllonexit
_onexit
memmove
_vscwprintf
wcsncpy_s
memcpy
toupper
_vsnwprintf
wcsncmp
memset

ntdll

RtlInitUnicodeString
NtOpenFile
NtFsControlFile
NtClose

kernel32

AcquireSRWLockExclusive
OutputDebugStringA
GetTickCount
ReleaseSRWLockExclusive
GetCurrentThreadId
GetCurrentProcessId
QueryPerformanceCounter
TerminateProcess
GetCurrentProcess
SetUnhandledExceptionFilter
UnhandledExceptionFilter
Sleep
HeapDestroy
GetProcessHeap
LocalAlloc
GetModuleFileNameA
ReleaseMutex
GetSystemTimeAsFileTime
FreeLibrary
GetLastError
GetProcAddress
LoadLibraryExW
GetModuleHandleW
lstrcmpiW
LeaveCriticalSection
RaiseException
EnterCriticalSection
MultiByteToWideChar
SizeofResource
LoadResource
FindResourceExW
GetModuleFileNameW
InitializeCriticalSection
DeleteCriticalSection
CreateFileW
CloseHandle
GetCurrentThread
CreateThread
WaitForSingleObjectEx
WaitForSingleObject
DisableThreadLibraryCalls
GetThreadLocale
SetThreadLocale
HeapSize
HeapReAlloc
HeapFree
HeapAlloc
CreateMutexW

user32

UnregisterClassA
CharNextW
LoadStringW

advapi32

LookupAccountSidW
EventSetInformation
EventProviderEnabled
EventRegister
EventUnregister
RegCloseKey
GetTokenInformation
RegQueryInfoKeyW
EventWriteTransfer
OpenThreadToken
EventActivityIdControl
ImpersonateLoggedOnUser
RegDeleteValueW
RegCreateKeyExW
RegSetValueExW
RegOpenKeyExW
RegEnumKeyExW

oleaut32

LoadTypeLi
SysAllocString
UnRegisterTypeLi
VarUI4FromStr
SysStringLen
RegisterTypeLi
SysFreeString

mpr

WNetEnumResourceW
WNetGetUserW
WNetCancelConnection2W
WNetCloseEnum
WNetOpenEnumW

wevtapi

EvtRender
EvtClose
EvtNext
EvtCreateRenderContext
EvtQuery

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

CoCreateInstance
CoTaskMemAlloc
CoTaskMemRealloc
CoInitializeEx
CoTaskMemFree
StringFromGUID2

srvcli

NetShareEnum

netutils

NetApiBufferFree

Exports

Exports

DllCanUnloadNow
DllGetClassObject
DllRegisterServer
DllUnregisterServer

Sections

.text
Size: 69KB - Virtual size: 69KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 512B - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

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

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

21f6b6afcfab21722d268bd3b49d8975

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

msvcrt

ntdll

kernel32

user32

advapi32

oleaut32

mpr

wevtapi

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

srvcli

netutils

Exports

Exports

Sections

.text Size: 69KB - Virtual size: 69KB

.data Size: 512B - Virtual size: 1KB

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

.rsrc Size: 3KB - Virtual size: 2KB

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

.text
Size: 69KB - Virtual size: 69KB

.data
Size: 512B - Virtual size: 1KB

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

.rsrc
Size: 3KB - Virtual size: 2KB

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