2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza

Sharing

Copy URL Twitter E-mail

General

Target
2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza
Size 1.2MB
Sample260803-rf3bpasvhv
SHA256 1ede5dca3bb91ff8a670e641081d71fbdc66e9f79a72f89eb51c526f66e70944
MD5 b03738bd1486f8ab118a5c7685d7d36c
SHA1 88f005072d83025d6842ed70bc411b940569d9be
SHA512 4522864ae8c6f4bcbf86d459e9481e34b723f861cb3086b1158b1198d57d835edc2f11d7c805987b48e1ea3db87e543d170810586ac690961f6ff6551c6f447b
SSDEEP 24576:cLw+FQv+btRD7r6wFC/DIwpemIwpel0dpXG1zT/CRaY5oMEvDnDF:cLw+m07r6SwLpeapel2p2ZT/CJ5Gvt
TLSH
T14445D003F74515B9E08AE5B48B12D233E5723C840B6171CB1BA93F2A3E75AD42B7972D
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza

File Explorer

2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza

.exe 1.2MB

2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza

IMPHASH 4429fb94219f6e5f4fe338c4c0ea218a
SHA256 1ede5dca3bb91ff8a670e641081d71fbdc66e9f79a72f89eb51c526f66e70944
MD5 b03738bd1486f8ab118a5c7685d7d36c
SHA1 88f005072d83025d6842ed70bc411b940569d9be
SHA512 4522864ae8c6f4bcbf86d459e9481e34b723f861cb3086b1158b1198d57d835edc2f11d7c805987b48e1ea3db87e543d170810586ac690961f6ff6551c6f447b
SSDEEP 24576:cLw+FQv+btRD7r6wFC/DIwpemIwpel0dpXG1zT/CRaY5oMEvDnDF:cLw+m07r6SwLpeapel2p2ZT/CJ5Gvt
TLSH
T14445D003F74515B9E08AE5B48B12D233E5723C840B6171CB1BA93F2A3E75AD42B7972D
MD5 SHA1 SHA512 SSDEEP TLSH

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

196192

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

firefox.pdb

mozglue

??$AddMarker@UTextMarker@markers@baseprofiler@mozilla@@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@baseprofiler@mozilla@@YA?AVProfileBufferBlockIndex@1@AEBV?$ProfilerStringView@D@1@AEBVMarkerCategory@1@$$QEAVMarkerOptions@1@UTextMarker@markers@01@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z ??0PrintfTarget@mozilla@@IEAA@XZ ??1MutexImpl@detail@mozilla@@QEAA@XZ ??2@YAPEAX_K@Z ??3@YAXPEAX@Z ??3@YAXPEAX_K@Z ??GTimeStampValue@mozilla@@QEBA_KAEBV01@@Z ??_U@YAPEAX_K@Z ??_V@YAXPEAX@Z ?BeginProcessRuntimeInit@detail@mscom@mozilla@@YAAEAW4ProcessInitState@123@XZ ?CleanupProcessRuntime@mozilla@@YAXXZ ?CreateAndStorePreXULSkeletonUI@mozilla@@YAXPEAUHINSTANCE__@@HPEAPEAD@Z ?DllBlocklist_Initialize@@YAXI@Z ?DllBlocklist_SetBasicDllServices@@YAXPEAVDllServicesBase@detail@glue@mozilla@@@Z ?DllBlocklist_SetFullDllServices@@YAXPEAVDllServicesBase@detail@glue@mozilla@@@Z ?EndProcessRuntimeInit@detail@mscom@mozilla@@YAXXZ ?GetProfilingStack@AutoProfilerLabel@baseprofiler@mozilla@@SAPEAVProfilingStack@23@XZ ?IsActiveAndUnpaused@RacyFeatures@detail@baseprofiler@mozilla@@SA_NXZ ?IsWin32kLockedDown@mozilla@@YA_NXZ ?MapRemoteViewOfFile@mozilla@@YAPEAXPEAX0_K01KK@Z ?Now@TimeStamp@mozilla@@CA?AV12@_N@Z ?PollPreXULSkeletonUIEvents@mozilla@@YAXXZ ?RegisterRuntimeExceptionModule@CrashReporter@@YAXXZ ?SetGeckoProcessType@mozilla@@YAXPEBD@Z ?SetWin32kLockedDownInPolicy@mozilla@@YAXXZ ?UnregisterRuntimeExceptionModule@CrashReporter@@YAXXZ ?WindowsDpiInitialization@mozilla@@YA?AW4WindowsDpiInitializationResult@1@XZ ?ensureCapacitySlow@ProfilingStack@baseprofiler@mozilla@@AEAAXXZ ?gTwoCharEscapes@detail@mozilla@@3QBDB ?lock@MutexImpl@detail@mozilla@@IEAAXXZ ?profiler_current_thread_id@baseprofiler@mozilla@@YA?AVBaseProfilerThreadId@12@XZ ?profiler_init@baseprofiler@mozilla@@YAXPEAX@Z ?profiler_shutdown@baseprofiler@mozilla@@YAXXZ ?sChildProcessType@startup@mozilla@@3W4GeckoProcessType@@A ?unlock@MutexImpl@detail@mozilla@@IEAAXXZ ?vprint@PrintfTarget@mozilla@@QEAA_NPEBDPEAD@Z _wcsdup free malloc moz_xmalloc mozalloc_abort realloc strdup

ntdll

NtMapViewOfSection NtOpenFile NtQueryInformationProcess NtQueryVirtualMemory NtReadVirtualMemory NtUnmapViewOfSection RtlAcquireSRWLockExclusive RtlAcquireSRWLockShared RtlAddFunctionTable RtlAllocateHeap RtlAnsiStringToUnicodeString RtlCaptureContext RtlCaptureStackBackTrace RtlCompareMemory RtlCompareUnicodeString RtlDuplicateUnicodeString RtlEqualUnicodeString RtlFreeHeap RtlFreeUnicodeString RtlGetLastWin32Error RtlGetVersion RtlInitAnsiString RtlInitUnicodeString RtlLookupFunctionEntry RtlNtStatusToDosError RtlQueryPerformanceCounter RtlReAllocateHeap RtlReleaseSRWLockExclusive RtlReleaseSRWLockShared RtlRunOnceExecuteOnce RtlRunOnceInitialize RtlSetLastWin32Error RtlVirtualUnwind VerSetConditionMask memcmp memcpy memmove memset

msvcp140

??0?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAA@XZ ??0ios_base@std@@IEAA@XZ ??1?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAA@XZ ??1ios_base@std@@UEAA@XZ ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@G@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@H@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@K@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@PEBX@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@_J@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@_K@Z ?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ ?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAXXZ ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ ?_Xlength_error@std@@YAXPEBD@Z ?_Xout_of_range@std@@YAXPEBD@Z ?clear@?$basic_ios@DU?$char_traits@D@std@@@std@@QEAAXH_N@Z ?fail@ios_base@std@@QEBA_NXZ ?flush@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@XZ ?good@ios_base@std@@QEBA_NXZ ?imbue@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAXAEBVlocale@2@@Z ?init@?$basic_ios@DU?$char_traits@D@std@@@std@@IEAAXPEAV?$basic_streambuf@DU?$char_traits@D@std@@@2@_N@Z ?setbuf@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAPEAV12@PEAD_J@Z ?showmanyc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JXZ ?sputc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHD@Z ?sync@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ ?uflow@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ ?xsgetn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEAD_J@Z ?xsputn@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JPEBD_J@Z

kernel32

AcquireSRWLockExclusive AssignProcessToJobObject AttachConsole CloseHandle CreateEventW CreateFileA CreateFileMappingA CreateFileMappingW CreateFileW CreateIoCompletionPort CreateJobObjectW CreateMutexW CreateNamedPipeW CreateProcessW CreateRemoteThread CreateThread CreateToolhelp32Snapshot DebugBreak DeleteCriticalSection DeleteFileW DeleteProcThreadAttributeList DuplicateHandle EncodePointer EnterCriticalSection EnumSystemLocalesEx ExpandEnvironmentStringsW FlushInstructionCache FreeEnvironmentStringsW FreeLibrary GetCurrentDirectoryW GetCurrentProcess GetCurrentProcessId GetCurrentProcessorNumber GetCurrentThread GetCurrentThreadId GetEnvironmentStringsW GetEnvironmentVariableW GetExitCodeProcess GetFileInformationByHandle GetFileInformationByHandleEx GetFileType GetLastError GetLongPathNameW GetModuleFileNameW GetModuleHandleA GetModuleHandleExW GetModuleHandleW GetNativeSystemInfo GetProcAddress GetProcessHandleCount GetProcessHeaps GetProcessId GetProductInfo GetQueuedCompletionStatus GetStartupInfoW GetStdHandle GetSystemDirectoryW GetSystemInfo GetSystemTimeAsFileTime GetThreadId GetTickCount GetUserDefaultLCID GetUserDefaultLangID GetUserDefaultLocaleName GetVersionExW GlobalMemoryStatusEx HeapDestroy HeapSetInformation InitOnceExecuteOnce InitializeCriticalSection InitializeCriticalSectionAndSpinCount InitializeCriticalSectionEx InitializeProcThreadAttributeList InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsWow64Process LeaveCriticalSection LoadLibraryExA LoadLibraryExW LoadLibraryW LocalFree MapViewOfFile Module32FirstW Module32NextW MultiByteToWideChar OpenProcess OutputDebugStringA PostQueuedCompletionStatus ProcessIdToSessionId QueryFullProcessImageNameW QueryPerformanceCounter QueryPerformanceFrequency RaiseException ReadFile ReadProcessMemory RegisterWaitForSingleObject ReleaseSRWLockExclusive ResetEvent ResumeThread SearchPathW SetDllDirectoryW SetEnvironmentVariableW SetEvent SetFilePointerEx SetHandleInformation SetInformationJobObject SetLastError SetStdHandle SetThreadAffinityMask SetUnhandledExceptionFilter SignalObjectAndWait Sleep TerminateJobObject TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue UnhandledExceptionFilter UnmapViewOfFile UnregisterWait UnregisterWaitEx UpdateProcThreadAttribute VerifyVersionInfoW VirtualAlloc VirtualAllocEx VirtualFree VirtualFreeEx VirtualProtect VirtualProtectEx VirtualQuery WaitForSingleObject WaitForSingleObjectEx WideCharToMultiByte WriteFile WriteProcessMemory lstrlenW

vcruntime140

_CxxThrowException __C_specific_handler __CxxFrameHandler3 __std_terminate _purecall strrchr wcschr

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

__acrt_iob_func __p__commode __stdio_common_vfprintf __stdio_common_vsnprintf_s __stdio_common_vsnwprintf_s __stdio_common_vswprintf _dup _fileno _get_osfhandle _set_fmode _wfopen _wtmpnam_s fclose fgets freopen

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

__p__environ _putenv _wgetenv getenv

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

__p___argc __p___wargv _beginthreadex _c_exit _cexit _configure_wide_argv _crt_atexit _errno _exit _get_initial_wide_environment _initialize_onexit_table _initialize_wide_environment _initterm _initterm_e _invalid_parameter_noinfo_noreturn _register_onexit_function _register_thread_local_exe_atexit_callback _seh_filter_exe _set_app_type exit terminate

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

__setusermatherr _fdopen

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

_gmtime64_s _time64 strftime

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

_ltoa_s wcstoul

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

_stricmp _wcslwr_s _wcsnicmp strcpy strlen towlower wcscat_s wcscmp wcscpy wcscpy_s wcslen wcsncmp wcsncpy wcspbrk wcstok_s

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

_wmakepath_s _wsplitpath_s

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

rand_s

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

_configthreadlocale

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

_set_new_mode

GetHandleVerifier GetNtLoaderAPI IsSandboxedProcess NativeNtBlockSet_Write TargetConfigureOPMProtectedOutput TargetConfigureOPMProtectedOutput64 TargetCreateNamedPipeW TargetCreateNamedPipeW64 TargetCreateOPMProtectedOutputs TargetCreateOPMProtectedOutputs64 TargetCreateProcessA TargetCreateProcessA64 TargetCreateProcessW TargetCreateProcessW64 TargetCreateThread TargetCreateThread64 TargetDestroyOPMProtectedOutput TargetDestroyOPMProtectedOutput64 TargetEnumDisplayDevicesA TargetEnumDisplayDevicesA64 TargetEnumDisplayMonitors TargetEnumDisplayMonitors64 TargetGdiDllInitialize TargetGdiDllInitialize64 TargetGetCertificate TargetGetCertificate64 TargetGetCertificateByHandle TargetGetCertificateByHandle64 TargetGetCertificateSize TargetGetCertificateSize64 TargetGetCertificateSizeByHandle TargetGetCertificateSizeByHandle64 TargetGetMonitorInfoA TargetGetMonitorInfoA64 TargetGetMonitorInfoW TargetGetMonitorInfoW64 TargetGetOPMInformation TargetGetOPMInformation64 TargetGetOPMRandomNumber TargetGetOPMRandomNumber64 TargetGetStockObject TargetGetStockObject64 TargetGetSuggestedOPMProtectedOutputArraySize TargetGetSuggestedOPMProtectedOutputArraySize64 TargetNtCreateEvent TargetNtCreateEvent64 TargetNtCreateFile TargetNtCreateFile64 TargetNtCreateKey TargetNtCreateKey64 TargetNtCreateSection TargetNtCreateSection64 TargetNtMapViewOfSection TargetNtMapViewOfSection64 TargetNtOpenEvent TargetNtOpenEvent64 TargetNtOpenFile TargetNtOpenFile64 TargetNtOpenKey TargetNtOpenKey64 TargetNtOpenKeyEx TargetNtOpenKeyEx64 TargetNtOpenProcess TargetNtOpenProcess64 TargetNtOpenProcessToken TargetNtOpenProcessToken64 TargetNtOpenProcessTokenEx TargetNtOpenProcessTokenEx64 TargetNtOpenThread TargetNtOpenThread64 TargetNtOpenThreadToken TargetNtOpenThreadToken64 TargetNtOpenThreadTokenEx TargetNtOpenThreadTokenEx64 TargetNtQueryAttributesFile TargetNtQueryAttributesFile64 TargetNtQueryFullAttributesFile TargetNtQueryFullAttributesFile64 TargetNtSetInformationFile TargetNtSetInformationFile64 TargetNtSetInformationThread TargetNtSetInformationThread64 TargetNtUnmapViewOfSection TargetNtUnmapViewOfSection64 TargetRegisterClassW TargetRegisterClassW64 TargetSetOPMSigningKeyAndSequenceNumbers TargetSetOPMSigningKeyAndSequenceNumbers64 g_handles_to_close g_interceptions g_nt g_originals g_shared_IPC_size g_shared_delayed_integrity_level g_shared_delayed_mitigations g_shared_policy_size g_shared_section

Name

.text

Size

328KB

Virtual Size

328KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

55KB

Virtual Size

55KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

1024B

Virtual Size

10KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

11KB

Virtual Size

11KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.00cfg

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.freestd

Size

512B

Virtual Size

16B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.tls

Size

512B

Virtual Size

17B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

250KB

Virtual Size

249KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

568KB

Virtual Size

572KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Sharing

General

Malware Config

Signatures

File Explorer

2026-08-03_b03738bd1486f8ab118a5c7685d7d36c_mespinoza

mozglue

ntdll

msvcp140

kernel32

vcruntime140

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

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

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

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

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

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

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

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

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

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

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

generic