xworm | 37xk8o44[.]exe

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General

Target
37xk8o44.exe
Size 406KB
Sample251129-er24vavpen
SHA256 a2c79ed9e8c6f6f143182b72bc6524c8d62a7af1efb6973af5ece46fac88eb5a
MD5 10772936db74d8871f828ba83497890c
SHA1 f1181dbc0a9134dfdda43dbacd498eb89aba002a
SHA512 80df153e0a89568850d2372adf5d90f8cb7327eb4eb6ac7339ad413cfc88c14f44c664c57669873054f2b4250c4e0ac8fa15a683f9fba625bb49f7ee295029f6
SSDEEP 6144:P+GYnA0zeWiDi5eJHQ8kV3f+RysMFZzN/EOtbMrtE8sNrwY:/YkDi5eJQ7uysMFZzN/dmBm11
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm

Malware Config

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
sample	family_xworm

Xworm family
xworm

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
37xk8o44.exe

File Explorer

37xk8o44.exe

.exe 406KB

37xk8o44.exe

IMPHASH 75d930149d98b9b34c55459c6a79b293
SHA256 a2c79ed9e8c6f6f143182b72bc6524c8d62a7af1efb6973af5ece46fac88eb5a
MD5 10772936db74d8871f828ba83497890c
SHA1 f1181dbc0a9134dfdda43dbacd498eb89aba002a
SHA512 80df153e0a89568850d2372adf5d90f8cb7327eb4eb6ac7339ad413cfc88c14f44c664c57669873054f2b4250c4e0ac8fa15a683f9fba625bb49f7ee295029f6
SSDEEP 6144:P+GYnA0zeWiDi5eJHQ8kV3f+RysMFZzN/EOtbMrtE8sNrwY:/YkDi5eJQ7uysMFZzN/dmBm11
MD5 SHA1 SHA512 SSDEEP

windows:6 windows x64 arch:x64

Detect Xworm Payload
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

108836

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

kernel32

AcquireSRWLockExclusive AreFileApisANSI BeginUpdateResourceA CloseHandle CopyFileA CreateDirectoryW CreateFileA CreateFileW CreateProcessW CreateThread DecodePointer DeleteCriticalSection DeleteFileW EncodePointer EndUpdateResourceA EnterCriticalSection EnumSystemLocalesW ExitProcess ExitThread FindClose FindFirstFileExW FindFirstFileW FindNextFileW FlsAlloc FlsFree FlsGetValue FlsSetValue FlushFileBuffers FormatMessageA FreeEnvironmentStringsW FreeLibrary FreeLibraryAndExitThread GetACP GetCPInfo GetCommandLineA GetCommandLineW GetConsoleMode GetConsoleOutputCP GetCurrentProcess GetCurrentProcessId GetCurrentThreadId GetDriveTypeA GetEnvironmentStringsW GetExitCodeThread GetFileAttributesA GetFileAttributesExW GetFileAttributesW GetFileInformationByHandleEx GetFileSizeEx GetFileType GetLastError GetLocaleInfoEx GetLocaleInfoW GetModuleFileNameA GetModuleFileNameW GetModuleHandleExW GetModuleHandleW GetOEMCP GetProcAddress GetProcessHeap GetStartupInfoW GetStdHandle GetStringTypeW GetSystemTimeAsFileTime GetTempPathW GetUserDefaultLCID HeapAlloc HeapFree HeapReAlloc HeapSize InitializeCriticalSectionAndSpinCount InitializeCriticalSectionEx InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsValidCodePage IsValidLocale LCMapStringEx LCMapStringW LeaveCriticalSection LoadLibraryExW LocalFree MultiByteToWideChar QueryPerformanceCounter RaiseException ReadConsoleW ReadFile ReleaseSRWLockExclusive RtlCaptureContext RtlLookupFunctionEntry RtlPcToFileHeader RtlUnwind RtlUnwindEx RtlVirtualUnwind SetEndOfFile SetFileAttributesW SetFilePointer SetFilePointerEx SetLastError SetStdHandle SetUnhandledExceptionFilter TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue TryAcquireSRWLockExclusive UnhandledExceptionFilter UpdateResourceW VirtualProtect WaitForSingleObjectEx WakeAllConditionVariable WideCharToMultiByte WriteConsoleW WriteFile

advapi32

RegCloseKey RegCreateKeyExA RegSetValueExA

shell32

CommandLineToArgvW ExtractIconExA SHGetFolderPathA SHGetFolderPathW

user32

DestroyIcon GetIconInfo

gdi32

DeleteObject GetBitmapBits GetObjectW

Name

.text

Size

212KB

Virtual Size

212KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

138KB

Virtual Size

138KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

11KB

Virtual Size

11KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

12KB

Virtual Size

12KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.fptable

Size

256B

Virtual Size

256B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.retplne

Size

200B

Virtual Size

200B

Characteristics

Name

_RDATA

Size

500B

Virtual Size

500B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.rsrc

Size

1KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

2KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

37xk8o44.exe

kernel32

advapi32

shell32

user32

gdi32

generic