2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza

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General

Target
2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza
Size 1.0MB
Sample261022-3e89dsyv3m
SHA256 a5e8f033c52872cf590f17572602ddd504e8762b1c038b03c084a44f98344332
MD5 660648cc8d8ff4b87f8c221af36ac58b
SHA1 19415370678f7281bc8cdf5b633877e8cd7acdf8
SHA512 d41d4ff3a9264e04362c7eac8fb0d63b4ad58b9a9d5391855c3c021b3bdee336b0ba2cd1af5a74a09efeea5b8902a4be82e49d5e5faf6c33fb6b7fca41045a02
SSDEEP 24576:6wq7kFJZGGAsMvxub8IIR6i7KlaadbU0IOW0weCvx0ltZb:6wq7kthGxubdNNVdb9IPK
TLSH
T191250103F24619FDE85AD2B99B47852AF6B07844433AFADF07D057262E62AD8773C710
MD5 SHA1 SHA512 SSDEEP TLSH

Score

5^/10

upx

Malware Config

Signatures

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
sample	upx

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza

File Explorer

2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza

.exe 1.0MB

2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza

IMPHASH e5bac749ed1f53b3f8061ebfc2d5715f
SHA256 a5e8f033c52872cf590f17572602ddd504e8762b1c038b03c084a44f98344332
MD5 660648cc8d8ff4b87f8c221af36ac58b
SHA1 19415370678f7281bc8cdf5b633877e8cd7acdf8
SHA512 d41d4ff3a9264e04362c7eac8fb0d63b4ad58b9a9d5391855c3c021b3bdee336b0ba2cd1af5a74a09efeea5b8902a4be82e49d5e5faf6c33fb6b7fca41045a02
SSDEEP 24576:6wq7kFJZGGAsMvxub8IIR6i7KlaadbU0IOW0weCvx0ltZb:6wq7kthGxubdNNVdb9IPK
TLSH
T191250103F24619FDE85AD2B99B47852AF6B07844433AFADF07D057262E62AD8773C710
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

UPX packed file

Detects executables packed with UPX/modified UPX open source packer.

upx
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

222768

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_GUARD_CF IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE

PDB paths

z:\task_1581954009\build\src\obj-firefox\ipc\app\plugin-container.pdb

mozglue

??2@YAPEAX_K@Z ??3@YAXPEAX@Z ??3@YAXPEAX_K@Z ??_U@YAPEAX_K@Z ??_V@YAXPEAX@Z ?DllBlocklist_Initialize@@YAXI@Z ?IsWin32kLockedDown@mozilla@@YA_NXZ _wcsdup free malloc moz_xmalloc mozalloc_abort realloc

advapi32

AccessCheck ConvertSidToStringSidW ConvertStringSecurityDescriptorToSecurityDescriptorW ConvertStringSidToSidW CopySid CreateProcessAsUserW CreateRestrictedToken CreateWellKnownSid DuplicateToken DuplicateTokenEx EqualSid FreeSid GetAce GetKernelObjectSecurity GetLengthSid GetNamedSecurityInfoW GetSecurityDescriptorSacl GetSecurityInfo GetSidSubAuthority GetTokenInformation ImpersonateLoggedOnUser InitializeSid IsValidSid LookupPrivilegeValueW MapGenericMask OpenProcessToken RegCloseKey RegCreateKeyExW RegDisablePredefinedCache RegOpenKeyExW RevertToSelf SetEntriesInAclW SetKernelObjectSecurity SetSecurityInfo SetThreadToken SetTokenInformation SystemFunction036

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@H@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 ?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 CloseHandle CreateEventW CreateFileMappingW CreateFileW CreateIoCompletionPort CreateJobObjectW CreateMutexW CreateNamedPipeW CreateProcessW CreateRemoteThread CreateThread DebugBreak DeleteCriticalSection DuplicateHandle EncodePointer EnterCriticalSection EnumSystemLocalesEx ExpandEnvironmentStringsW FlushInstructionCache FreeEnvironmentStringsW FreeLibrary GetCurrentDirectoryW GetCurrentProcess GetCurrentProcessId GetCurrentThread GetCurrentThreadId GetEnvironmentStringsW GetEnvironmentVariableW GetFileAttributesW GetFileType GetLastError GetLongPathNameW GetModuleHandleA GetModuleHandleW GetNativeSystemInfo GetProcAddress GetProcessHandleCount GetProcessHeaps GetProcessId GetQueuedCompletionStatus GetSystemInfo GetSystemTimeAsFileTime GetThreadId GetTickCount GetUserDefaultLCID GetUserDefaultLangID GetUserDefaultLocaleName GetVersionExW GetVolumePathNameW HeapDestroy HeapSetInformation InitOnceExecuteOnce InitializeCriticalSection InitializeCriticalSectionAndSpinCount InitializeCriticalSectionEx InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent LeaveCriticalSection LoadLibraryExA LoadLibraryW LocalFree MapViewOfFile OpenProcess PostQueuedCompletionStatus ProcessIdToSessionId QueryPerformanceCounter QueryPerformanceFrequency RaiseException ReadProcessMemory RegisterWaitForSingleObject ReleaseSRWLockExclusive ResetEvent RtlCaptureContext RtlLookupFunctionEntry RtlVirtualUnwind SearchPathW SetDllDirectoryW SetEnvironmentVariableW SetEvent SetHandleInformation SetInformationJobObject SetLastError SetUnhandledExceptionFilter SignalObjectAndWait Sleep TerminateJobObject TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue UnhandledExceptionFilter UnmapViewOfFile UnregisterWaitEx VerSetConditionMask VerifyVersionInfoW VirtualAlloc VirtualAllocEx VirtualFree VirtualFreeEx VirtualProtect VirtualProtectEx VirtualQuery VirtualQueryEx WaitForSingleObject WaitForSingleObjectEx WideCharToMultiByte WriteProcessMemory lstrlenW

vcruntime140

__C_specific_handler __CxxFrameHandler3 __std_terminate _purecall memcmp memcpy memmove memset

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

__p__commode __stdio_common_vsnwprintf_s __stdio_common_vswprintf _set_fmode

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

__p___argc __p___wargv _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-string-l1-1-0

_wcsicmp _wcsnicmp strlen towupper wcscmp wcslen wcsncmp

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

getenv

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

rand_s

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

__setusermatherr

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

_configthreadlocale

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

_set_new_mode

GetHandleVerifier IsSandboxedProcess 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 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

217KB

Virtual Size

217KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

31KB

Virtual Size

31KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

512B

Virtual Size

9KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

9KB

Virtual Size

9KB

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

.tls

Size

512B

Virtual Size

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.rsrc

Size

3KB

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

UPX1

Size

762KB

Virtual Size

764KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

2026-10-21_660648cc8d8ff4b87f8c221af36ac58b_mespinoza

mozglue

advapi32

msvcp140

kernel32

vcruntime140

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

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

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

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

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

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

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

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

generic