2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza

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General

Target
2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza
Size 775KB
Sample260802-c7fvfaca97
SHA256 0a8c0e46e107ddb6963f034cad9714b004281cff7f73f376fc79ec895bb52057
MD5 b6796c692a2b3f5e64a578079e0924cb
SHA1 6830cb014015baff227de7f9efd73539fc0cf35f
SHA512 803a67a3a7513799e6f98b1c73fce6ee6216c0751811632ee466455c2babb976f8d8c63b1407d7322982b18214b7f2f8e1c007bba5e251e2a915bda8e3a024b5
SSDEEP 6144:fVfs9w7qfsnc91Vr97MKNRneNMToeGY6htDH:fhs9qBc/TchDDH
TLSH
T1D4F4503375A91848FD0E2DF48581B234F321ACAF3E4F7A8ADC48760E99776D23C59166
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza

File Explorer

2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza

.exe 775KB

2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza

IMPHASH 9a65c6ad1d23d058d464d247463262b4
SHA256 0a8c0e46e107ddb6963f034cad9714b004281cff7f73f376fc79ec895bb52057
MD5 b6796c692a2b3f5e64a578079e0924cb
SHA1 6830cb014015baff227de7f9efd73539fc0cf35f
SHA512 803a67a3a7513799e6f98b1c73fce6ee6216c0751811632ee466455c2babb976f8d8c63b1407d7322982b18214b7f2f8e1c007bba5e251e2a915bda8e3a024b5
SSDEEP 6144:fVfs9w7qfsnc91Vr97MKNRneNMToeGY6htDH:fhs9qBc/TchDDH
TLSH
T1D4F4503375A91848FD0E2DF48581B234F321ACAF3E4F7A8ADC48760E99776D23C59166
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

33976

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

P:\Target\x64\ship\lync\x-none\lync99.pdb

advapi32

RegisterTraceGuidsW UnregisterTraceGuids GetTraceLoggerHandle GetTraceEnableLevel GetTraceEnableFlags TraceMessage EventRegister EventUnregister StartTraceW QueryTraceW ControlTraceW EnableTrace RegCloseKey RegCreateKeyExW RegOpenKeyExW RegQueryValueExW RegSetValueExW RegGetValueW

kernel32

GetCommandLineW CloseHandle WaitForSingleObject CreateMutexW ExitProcess CreateThread GetCurrentThreadId OpenProcess FreeLibrary LocalFree SetThreadLocale AcquireSRWLockShared AcquireSRWLockExclusive ReleaseSRWLockShared ReleaseSRWLockExclusive GetProcAddress GetModuleHandleW VirtualQuery VirtualProtect GetSystemInfo FindActCtxSectionStringW DeactivateActCtx ActivateActCtx CreateActCtxW LoadLibraryW GetModuleHandleExW GetModuleFileNameW DeleteCriticalSection InitializeCriticalSectionEx LeaveCriticalSection EnterCriticalSection GetProcessHeap HeapSize HeapFree HeapReAlloc HeapAlloc HeapDestroy InitializeSRWLock QueryPerformanceFrequency GetTickCount64 SetLastError GetLastError RaiseException ExpandEnvironmentStringsW MoveFileExW FindResourceW SizeofResource LockResource LoadResource FindResourceExW GetStartupInfoW InitializeSListHead IsProcessorFeaturePresent TerminateProcess GetCurrentProcess SetUnhandledExceptionFilter UnhandledExceptionFilter RtlVirtualUnwind RtlLookupFunctionEntry RtlCaptureContext OutputDebugStringA CreateEventW WaitForSingleObjectEx ResetEvent SetEvent WerRegisterMemoryBlock GetTickCount GetSystemTimeAsFileTime GetCurrentProcessId LoadLibraryExA IsDebuggerPresent HeapSetInformation QueryPerformanceCounter QueryActCtxW FormatMessageA LoadLibraryExW OutputDebugStringW

ole32

OleInitialize CoUninitialize CoInitializeEx

vcruntime140

__std_terminate _CxxThrowException memmove __C_specific_handler __CxxFrameHandler3 memset __vcrt_InitializeCriticalSectionEx __telemetry_main_return_trigger __telemetry_main_invoke_trigger wcsrchr memcpy

msvcp140

?_Xinvalid_argument@std@@YAXPEBD@Z ?_Xlength_error@std@@YAXPEBD@Z ?_Xout_of_range@std@@YAXPEBD@Z ?_Xbad_alloc@std@@YAXXZ

api-ms-win-crt-heap-l1-1-0

calloc _set_new_mode malloc free

api-ms-win-crt-runtime-l1-1-0

_invalid_parameter_noinfo_noreturn _crt_atexit _register_onexit_function _initialize_onexit_table terminate _invalid_parameter_noinfo _register_thread_local_exe_atexit_callback _c_exit _cexit _errno _exit exit _initterm_e _initterm _get_narrow_winmain_command_line _initialize_narrow_environment _seh_filter_exe _configure_narrow_argv _set_app_type

api-ms-win-crt-string-l1-1-0

wcsncpy_s wcsncat_s _wcsicmp wcsnlen wcscpy_s wmemcpy_s

api-ms-win-crt-convert-l1-1-0

wcstoll

api-ms-win-crt-math-l1-1-0

__setusermatherr

api-ms-win-crt-stdio-l1-1-0

__stdio_common_vswprintf __p__commode __stdio_common_vswprintf_s _set_fmode

api-ms-win-crt-locale-l1-1-0

_configthreadlocale __initialize_lconv_for_unsigned_char

Name

.text

Size

55KB

Virtual Size

55KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

58KB

Virtual Size

58KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

42KB

Virtual Size

53KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

3KB

Virtual Size

3KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

572KB

Virtual Size

572KB

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

2026-08-02_b6796c692a2b3f5e64a578079e0924cb_mespinoza

advapi32

kernel32

ole32

vcruntime140

msvcp140

api-ms-win-crt-heap-l1-1-0

api-ms-win-crt-runtime-l1-1-0

api-ms-win-crt-string-l1-1-0

api-ms-win-crt-convert-l1-1-0

api-ms-win-crt-math-l1-1-0

api-ms-win-crt-stdio-l1-1-0

api-ms-win-crt-locale-l1-1-0

generic