2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza

Sharing

Copy URL Twitter E-mail

General

Target
2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza
Size 1.2MB
Sample260531-jsfdpacx5x
SHA256 d3eeab521ca1273200ab9028d8e2439cf1eaa5bb8436cb589439a8336c5436fd
MD5 bfc2d8ba47936f24335ca2832949e8a3
SHA1 3d59c4372290b0f5dd6e5b2142300edb658deabc
SHA512 46c92f2906e1d0811496f4dfe786110886bd7c322c7881b96a20451db0d238491e822cdbbcad9ecd5348cbf4c247adf70f2ad30413387aa92881bc2f7ca39795
SSDEEP 24576:P1DnJXNRc7i53Bv17wpemIwpelfxfJ4yL/tNCJPXUQrPo:drJXNS7o3Bv1EpeapelpfJ4klKXnw
TLSH
T10845E003F38416F8E48AD5B89A45D133E6723C840B51A1DB1BE93F2A3E71AD51B7876C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza

File Explorer

2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza

.exe 1.2MB

2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza

IMPHASH bb4ce52e8306f88c0b1da570553704e4
SHA256 d3eeab521ca1273200ab9028d8e2439cf1eaa5bb8436cb589439a8336c5436fd
MD5 bfc2d8ba47936f24335ca2832949e8a3
SHA1 3d59c4372290b0f5dd6e5b2142300edb658deabc
SHA512 46c92f2906e1d0811496f4dfe786110886bd7c322c7881b96a20451db0d238491e822cdbbcad9ecd5348cbf4c247adf70f2ad30413387aa92881bc2f7ca39795
SSDEEP 24576:P1DnJXNRc7i53Bv17wpemIwpelfxfJ4yL/tNCJPXUQrPo:drJXNS7o3Bv1EpeapelpfJ4klKXnw
TLSH
T10845E003F38416F8E48AD5B89A45D133E6723C840B51A1DB1BE93F2A3E71AD51B7876C
MD5 SHA1 SHA512 SSDEEP TLSH

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

130272

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 ??_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 ?SetGeckoChildID@mozilla@@YAXPEBD@Z ?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 printf_stderr realloc strdup

ntdll

NtMapViewOfSection NtOpenFile NtQueryInformationProcess NtQueryObject NtQueryVirtualMemory NtReadVirtualMemory NtUnmapViewOfSection RtlAcquireSRWLockExclusive RtlAcquireSRWLockShared RtlAddFunctionTable RtlAllocateHeap RtlAnsiStringToUnicodeString RtlCaptureContext RtlCaptureStackBackTrace RtlCompareMemory RtlCompareUnicodeString RtlDuplicateUnicodeString RtlEqualUnicodeString RtlFreeHeap RtlFreeUnicodeString RtlGetLastWin32Error RtlInitAnsiString RtlInitUnicodeString RtlLookupFunctionEntry RtlNtStatusToDosError RtlQueryPerformanceCounter RtlReAllocateHeap RtlReleaseSRWLockExclusive RtlReleaseSRWLockShared RtlRunOnceExecuteOnce RtlRunOnceInitialize RtlSetLastWin32Error RtlSleepConditionVariableSRW RtlVirtualUnwind RtlWakeAllConditionVariable 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@_K@Z ?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ ?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAXXZ ?_Raise_handler@std@@3P6AXAEBVexception@stdext@@@ZEA ?_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 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 GetSystemInfo GetSystemTimeAsFileTime GetThreadId GetTickCount GetUserDefaultLCID GetUserDefaultLangID GetUserDefaultLocaleName GetVersionExW GlobalMemoryStatusEx HeapDestroy HeapSetInformation InitOnceExecuteOnce InitializeCriticalSection InitializeCriticalSectionEx InitializeProcThreadAttributeList InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent IsWow64Process LeaveCriticalSection LoadLibraryExA LoadLibraryExW LoadLibraryW LocalFree MapViewOfFile Module32FirstW Module32NextW MultiByteToWideChar OpenProcess 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 SleepConditionVariableSRW TerminateJobObject TerminateProcess TlsAlloc TlsFree TlsGetValue TlsSetValue UnhandledExceptionFilter UnmapViewOfFile UnregisterWait UnregisterWaitEx UpdateProcThreadAttribute VerifyVersionInfoW VirtualAlloc VirtualAllocEx VirtualFree VirtualFreeEx VirtualProtect VirtualProtectEx VirtualQuery WaitForSingleObject WakeAllConditionVariable WideCharToMultiByte WriteFile WriteProcessMemory lstrlenW

vcruntime140

_CxxThrowException __C_specific_handler __current_exception __current_exception_context __std_terminate strrchr wcschr

vcruntime140_1

__CxxFrameHandler4

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

__acrt_iob_func __p__commode __stdio_common_vsnprintf_s __stdio_common_vsnwprintf_s __stdio_common_vswprintf _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 _invoke_watson _register_onexit_function _register_thread_local_exe_atexit_callback _seh_filter_exe _set_app_type exit terminate

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 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-math-l1-1-0

__setusermatherr ceilf

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 TargetGetForegroundWindow TargetGetForegroundWindow64 TargetGetMonitorInfoA TargetGetMonitorInfoA64 TargetGetMonitorInfoW TargetGetMonitorInfoW64 TargetGetOPMInformation TargetGetOPMInformation64 TargetGetOPMRandomNumber TargetGetOPMRandomNumber64 TargetGetStockObject TargetGetStockObject64 TargetGetSuggestedOPMProtectedOutputArraySize TargetGetSuggestedOPMProtectedOutputArraySize64 TargetNtCreateEvent TargetNtCreateEvent64 TargetNtCreateFile TargetNtCreateFile64 TargetNtCreateKey TargetNtCreateKey64 TargetNtCreateSection TargetNtCreateSection64 TargetNtImpersonateAnonymousToken TargetNtImpersonateAnonymousToken64 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

331KB

Virtual Size

330KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

58KB

Virtual Size

57KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

1KB

Virtual Size

10KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

10KB

Virtual Size

10KB

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

.retplne

Size

512B

Virtual Size

36B

Characteristics

Name

.tls

Size

512B

Virtual Size

25B

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

2026-05-31_bfc2d8ba47936f24335ca2832949e8a3_cobalt-strike_mespinoza

mozglue

ntdll

msvcp140

kernel32

vcruntime140

vcruntime140_1

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-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-math-l1-1-0

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

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

generic