UpdateSrv1031[.]exe

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General

Target

UpdateSrv1031.exe
Size

441KB
MD5

f05d2baa80b3923ff54c1483562f16f4
SHA1

66f8a74ac799307c6a7bfe77abb498e3058c972d
SHA256

679dd7bb71e5e3b5202f73320566ab3310e38c1f2229fd68382fbe85d4ffbe94
SHA512

64c822fce62adb16b5a8188669595e12775bc2461b9f91982721569bcb35de2c3101ed41774bc7445db6a623d99bc6da1563f7ca6efc34fa8ad739c5ebaadbf4
SSDEEP

12288:5VV/hE6LzbFZTnBDNJeaiNZlxx2QFIcLepM0UnF2UCQwVUCPuB93hTrxpqnuqXM:V7e6i0EsU2aB9xTrxp+uqc

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
UpdateSrv1031.exe

Files

UpdateSrv1031.exe
.exe windows x86

47aa026cdf0023581ddd47fd973dbd41

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE

Imports

kernel32

SetEndOfFile
GetLocalTime
GetFileAttributesA
FileTimeToSystemTime
FileTimeToLocalFileTime
FindNextFileW
FindClose
FindFirstFileW
GetProcAddress
GetModuleHandleW
GetFileAttributesW
CreateDirectoryW
DeleteFileW
CreateSemaphoreW
TerminateThread
DuplicateHandle
ExitThread
ResumeThread
CreateThread
FreeLibrary
LoadLibraryA
GetModuleFileNameA
Process32NextW
Process32FirstW
CreateToolhelp32Snapshot
SetUnhandledExceptionFilter
GetModuleHandleA
RaiseException
GetFullPathNameA
OpenEventW
SetLastError
lstrcpyW
FormatMessageA
SetFileAttributesW
MultiByteToWideChar
GetLastError
GetStdHandle
Sleep
GetDiskFreeSpaceExW
MoveFileW
GetSystemTimeAsFileTime
QueryPerformanceCounter
IsDebuggerPresent
UnhandledExceptionFilter
InterlockedCompareExchange
InterlockedExchange
GetTickCount
GetCurrentProcessId
WideCharToMultiByte
GlobalFree
lstrlenA
GlobalLock
GlobalAlloc
GetFullPathNameW
InterlockedIncrement
ReadFile
SetFilePointer
CloseHandle
GetFileSize
CreateFileW
lstrlenW
CreateDirectoryA
OutputDebugStringA
WriteConsoleA
CreateDirectoryExW
OutputDebugStringW
WriteConsoleW
AllocConsole
GetCurrentProcess
WaitForSingleObject
TerminateProcess
LocalFree
LeaveCriticalSection
GetCurrentThreadId
EnterCriticalSection
DeleteCriticalSection
InitializeCriticalSection
SetCurrentDirectoryW
GetModuleFileNameW
CreateEventW
SetEvent
ResetEvent
WriteFile
RemoveDirectoryW
CreateFileA
ReleaseSemaphore
InterlockedDecrement

user32

CharNextW
CharNextA
CharUpperA
MessageBoxW
CharLowerW
PostThreadMessageW

advapi32

OpenServiceW
OpenSCManagerW
StartServiceW
CreateServiceW
DeleteService
ControlService
DeregisterEventSource
ReportEventW
RegisterEventSourceW
SetServiceStatus
RegisterServiceCtrlHandlerW
StartServiceCtrlDispatcherW
CloseServiceHandle

shell32

ord165

ole32

CoInitialize
CoUninitialize

sgmempool

ord2
ord1

winmm

timeGetTime
timeBeginPeriod
timeGetDevCaps
timeSetEvent
timeEndPeriod
timeKillEvent

psapi

GetPerformanceInfo

msvcr90

_encode_pointer
__set_app_type
_unlock
__dllonexit
_lock
_onexit
_decode_pointer
_except_handler4_common
?terminate@@YAXXZ
_crt_debugger_hook
?_type_info_dtor_internal_method@type_info@@QAEXXZ
_invoke_watson
_controlfp_s
_timezone
_wcsnicmp
wcsncpy
__p__fmode
__p__commode
_adjust_fdiv
__setusermatherr
_configthreadlocale
_initterm_e
_initterm
__winitenv
exit
_XcptFilter
_exit
_cexit
__wgetmainargs
_amsg_exit
??_U@YAPAXI@Z
??_V@YAXPAX@Z
qsort
strncmp
isalnum
isalpha
tolower
_vsnprintf_s
??3@YAXPAX@Z
??2@YAPAXI@Z
_waccess
_vswprintf
iswdigit
_wtoi
_assert
_wcsicmp
printf
_time32
srand
system
gets
memmove
isspace
vsprintf
sprintf
isdigit
atoi
strchr
_purecall
_stricmp
strncpy
rand
_access
wcsstr
strstr
fopen
fseek
ftell
fclose
swscanf
strrchr
wcschr
wcsrchr
memset
__CxxFrameHandler3
wcspbrk
wcsncmp
_putws
memcpy
_localtime32
fflush
_fdopen
_dup2
_open_osfhandle
__iob_func
_vsnprintf
_swprintf
free
fputws
_wcsdup
_vsnwprintf
_wfopen
fputs
_CxxThrowException
_tzset
_ltow
fwrite
_wtol
fread
malloc
_wfullpath
ferror
fopen_s
fputc
fprintf

ws2_32

send
recvfrom
ntohl
select
__WSAFDIsSet
closesocket
htonl
bind
socket
WSACleanup
WSAStartup
sendto
inet_addr
getsockname
ntohs
htons
inet_ntoa

pdh

PdhAddCounterA
PdhRemoveCounter
PdhCloseQuery
PdhOpenQueryW
PdhGetFormattedCounterValue
PdhCollectQueryData

dbghelp

MiniDumpWriteDump
MakeSureDirectoryPathExists

shlwapi

PathIsDirectoryW
PathFileExistsW

version

GetFileVersionInfoW
VerQueryValueW
GetFileVersionInfoSizeA
GetFileVersionInfoA
GetFileVersionInfoSizeW
VerQueryValueA

Sections

.text
Size: 315KB - Virtual size: 314KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 81KB - Virtual size: 80KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 16KB - Virtual size: 17KB

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: 27KB - Virtual size: 26KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

47aa026cdf0023581ddd47fd973dbd41

Headers

DLL Characteristics

File Characteristics

Imports

kernel32

user32

advapi32

shell32

ole32

sgmempool

winmm

psapi

msvcr90

ws2_32

pdh

dbghelp

shlwapi

version

Sections

.text Size: 315KB - Virtual size: 314KB

.rdata Size: 81KB - Virtual size: 80KB

.data Size: 16KB - Virtual size: 17KB

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

.reloc Size: 27KB - Virtual size: 26KB

.text
Size: 315KB - Virtual size: 314KB

.rdata
Size: 81KB - Virtual size: 80KB

.data
Size: 16KB - Virtual size: 17KB

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

.reloc
Size: 27KB - Virtual size: 26KB