bestclient-updater[.]exe

General

Target
bestclient-updater.exe
Size 262KB
Sample261024-ykqa9abz21
SHA256 e57d0c7fefebaeb0575d769128e68c8ac47fe7c0610519760839b6249f5bca66
MD5 1c1671273f580cd5162d8586af4b1d46
SHA1 18285214a696780d71d2dc955c250cb9340da20b
SHA512 0466781eb92801d0b9740ff0125cb20831a26a8f28ead894d8c4802a4aa8a18d3192c4b1e52bf2f4acb3ee74ba007897f0d608f6a36bc8a722613a039990f2c4
SSDEEP 6144:ubt1AYd8ExK9X0jMUtwhgSqXGhd4hdtn:4xckjMUtwROGhYdtn
TLSH
T1EC449E06B6A60CF6D6774578C8D20A06DB367C2107A0D9DB47906E9E7F23AD08F3D7A1
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
bestclient-updater.exe

File Explorer

bestclient-updater.exe

.exe 262KB

bestclient-updater.exe

IMPHASH 97c3b98d4e5537ec75425269774ae3ba
SHA256 e57d0c7fefebaeb0575d769128e68c8ac47fe7c0610519760839b6249f5bca66
MD5 1c1671273f580cd5162d8586af4b1d46
SHA1 18285214a696780d71d2dc955c250cb9340da20b
SHA512 0466781eb92801d0b9740ff0125cb20831a26a8f28ead894d8c4802a4aa8a18d3192c4b1e52bf2f4acb3ee74ba007897f0d608f6a36bc8a722613a039990f2c4
SSDEEP 6144:ubt1AYd8ExK9X0jMUtwhgSqXGhd4hdtn:4xckjMUtwROGhYdtn
TLSH
T1EC449E06B6A60CF6D6774578C8D20A06DB367C2107A0D9DB47906E9E7F23AD08F3D7A1
MD5 SHA1 SHA512 SSDEEP TLSH

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

0

Major OS version

6

Entry point

49456

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

shell32

CommandLineToArgvW ShellExecuteExW

kernel32

GetFileSizeEx ReadFile RemoveDirectoryW WriteFile CloseHandle GetLastError InitializeCriticalSection EnterCriticalSection LeaveCriticalSection DeleteCriticalSection WaitForSingleObject Sleep CreateThread OpenProcess LocalFree CopyFileW MultiByteToWideChar HeapReAlloc GetFileAttributesW GetProcessHeap GetStringTypeW FreeEnvironmentStringsW GetEnvironmentStringsW GetCommandLineA GetCPInfo GetOEMCP GetACP IsValidCodePage FindFirstFileExW SetStdHandle FindNextFileW FindFirstFileW FindClose DeleteFileW CreateFileW CreateDirectoryW GetCommandLineW FlushFileBuffers WriteConsoleW HeapSize GetModuleHandleW QueryPerformanceCounter GetCurrentProcessId GetCurrentThreadId GetSystemTimeAsFileTime InitializeSListHead SetUnhandledExceptionFilter GetStartupInfoW RtlPcToFileHeader RaiseException RtlLookupFunctionEntry RtlUnwindEx SetLastError FlsAlloc FlsGetValue FlsSetValue FlsFree EncodePointer InitializeCriticalSectionEx GetFileType SetFilePointerEx GetStdHandle GetModuleFileNameW GetCurrentProcess ExitProcess TerminateProcess FreeLibrary GetModuleHandleExW GetProcAddress GetConsoleMode GetConsoleOutputCP IsProcessorFeaturePresent RtlCaptureContext RtlVirtualUnwind IsDebuggerPresent UnhandledExceptionFilter HeapFree HeapAlloc WideCharToMultiByte VirtualProtect LoadLibraryExW LCMapStringW

user32

MessageBoxW GetClientRect InvalidateRect EndPaint BeginPaint DrawTextW GetSystemMetrics LoadCursorW CreateWindowExW RegisterClassExW PostQuitMessage DefWindowProcW PostMessageW DispatchMessageW TranslateMessage GetMessageW LoadIconW FillRect DestroyWindow

gdi32

SetTextColor SetBkMode SelectObject DeleteObject DeleteDC CreateSolidBrush CreateFontW CreateCompatibleDC CreateCompatibleBitmap BitBlt

Name

.text

Size

135KB

Virtual Size

134KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

78KB

Virtual Size

78KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

4KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

7KB

Virtual Size

6KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.fptable

Size

512B

Virtual Size

256B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

34KB

Virtual Size

33KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

bestclient-updater.exe

shell32

kernel32

user32

gdi32

generic