2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza

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General

Target
2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza
Size 293KB
Sample260930-d4jycstfkd
SHA256 794d848ee86f55fff5eb8d7c360d575f6cc34f357d9a0c03dd3efc01b86fa300
MD5 2fc16c391915d7a303b25afb95c401f5
SHA1 96d66801c3557eedfd866843e5a0f2c319096905
SHA512 9a01adcc3d9bfc8a3ccd197aba1c8de6a558186c15ab140764b86f7e047bffe0caa35146b1de55058df2521fcdccdefb3359b4860f11d229faf274afebcddd29
SSDEEP 6144:FDEOYF64/CTpri3rdXsQwYKIVu7sTubdhfnMx4:FZYF5/zcIFSdhfn0
TLSH
T1C7545B43A61924BAD89EC0B996835025EA717C4D0730F4DF13D4BB226E6A7E06F3DF85
MD5 SHA1 SHA512 SSDEEP TLSH

Score

5^/10

Malware Config

Signatures

Codesign digest Mismatch 1 IoCs

File was altered after it was signed.

resource
2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza

File Explorer

2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza

.exe 293KB

2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza

IMPHASH 780e05e5b06fcc7ae9626db5cf3582fb
SHA256 794d848ee86f55fff5eb8d7c360d575f6cc34f357d9a0c03dd3efc01b86fa300
MD5 2fc16c391915d7a303b25afb95c401f5
SHA1 96d66801c3557eedfd866843e5a0f2c319096905
SHA512 9a01adcc3d9bfc8a3ccd197aba1c8de6a558186c15ab140764b86f7e047bffe0caa35146b1de55058df2521fcdccdefb3359b4860f11d229faf274afebcddd29
SSDEEP 6144:FDEOYF64/CTpri3rdXsQwYKIVu7sTubdhfnMx4:FZYF5/zcIFSdhfn0
TLSH
T1C7545B43A61924BAD89EC0B996835025EA717C4D0730F4DF13D4BB226E6A7E06F3DF85
MD5 SHA1 SHA512 SSDEEP TLSH

Codesign digest Mismatch

File was altered after it was signed.

PE Signature issue

Digest

54:2a:69:aa:72:78:85:87:e2:00:9f:0a:2b:27:34:0d:08:13:cc:b3

Digest Algorithm

sha1

PE Digests Matches

Not matched

Trusted

Signing Certificate

CN=Mozilla Corporation,OU=Release Engineering,O=Mozilla Corporation,L=Mountain View,ST=California,C=US,1.2.840.113549.1.9.1=#0c2072656c656173652b636572746966696361746573406d6f7a696c6c612e636f6d

Chains

Feb 17, 2020

CN=Mozilla Corporation,OU=Release Engineering,O=Mozilla Corporation,L=Mountain View,ST=California,C=US,1.2.840.113549.1.9.1=#0c2072656c656173652b636572746966696361746573406d6f7a696c6c612e636f6d

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Subject

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

0c:e7:e0:e5:17:d8:46:fe:8f:e5:60:fc:1b:f0:30:39

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Revocation Status

Not revoked

Timespan

Nov 10, 2006 - Nov 10, 2031

Subject

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

04:09:18:1b:5f:d5:bb:66:75:53:43:b5:6f:95:50:08

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

Oct 22, 2013 - Oct 22, 2028

Subject

CN=Mozilla Corporation,OU=Release Engineering,O=Mozilla Corporation,L=Mountain View,ST=California,C=US,1.2.840.113549.1.9.1=#0c2072656c656173652b636572746966696361746573406d6f7a696c6c612e636f6d

Serial Number

0b:1f:8c:d5:9e:64:74:6b:ea:e1:53:ec:ca:21:06:6b

Issuer

CN=DigiCert SHA2 Assured ID Code Signing CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

May 31, 2019 - Jun 4, 2020

Subject

CN=DigiCert Assured ID CA-1,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

06:fd:f9:03:96:03:ad:ea:00:0a:eb:3f:27:bb:ba:1b

Issuer

CN=DigiCert Assured ID Root CA,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageServerAuth, ExtKeyUsageClientAuth, ExtKeyUsageCodeSigning, ExtKeyUsageEmailProtection, ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

Nov 10, 2006 - Nov 10, 2021

Subject

CN=DigiCert Timestamp Responder,O=DigiCert,C=US

Serial Number

03:01:9a:02:3a:ff:58:b1:6b:d6:d5:ea:e6:17:f0:66

Issuer

CN=DigiCert Assured ID CA-1,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

Oct 22, 2014 - Oct 22, 2024

Minor OS version

Major OS version

Entry point

272072

Magic Number

523

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

DLL Characteristics

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

nss3

HASH_Begin HASH_Create HASH_Destroy HASH_End HASH_Update NSS_Initialize

user32

BeginPaint CallWindowProcW CheckDlgButton ChildWindowFromPoint CloseClipboard DialogBoxIndirectParamW DialogBoxParamW DrawTextW EnableWindow EndDialog EndPaint FillRect GetClientRect GetClipboardData GetDC GetDlgItem GetDlgItemTextW GetFocus GetPropW GetSysColor GetSysColorBrush GetWindowLongPtrW GetWindowRect GetWindowTextW InvalidateRect IsClipboardFormatAvailable IsDlgButtonChecked IsWindowEnabled LoadIconW MapWindowPoints MessageBoxW MoveWindow OpenClipboard PostMessageW RemovePropW SendDlgItemMessageW SendMessageW SetDlgItemTextW SetFocus SetPropW SetTimer SetWindowLongPtrW SetWindowTextW ShowWindow

gdi32

GetStockObject GetTextExtentPoint32W SelectObject SetBkMode SetTextColor

advapi32

RegCloseKey RegCreateKeyExW RegCreateKeyW RegDeleteValueW RegOpenKeyExW RegOpenKeyW RegQueryValueExW RegSetValueExW

comctl32

InitCommonControlsEx

ole32

CoCreateGuid

shell32

SHGetFolderPathW

wininet

HttpAddRequestHeadersW HttpOpenRequestW HttpQueryInfoW HttpSendRequestW InternetCloseHandle InternetConnectW InternetCrackUrlW InternetOpenW InternetQueryDataAvailable InternetReadFile InternetSetOptionW

shlwapi

PathAppendW

msvcp140

??0?$basic_streambuf@DU?$char_traits@D@std@@@std@@IEAA@XZ ??0_Lockit@std@@QEAA@H@Z ??0ios_base@std@@IEAA@XZ ??1?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAA@XZ ??1_Lockit@std@@QEAA@XZ ??1ios_base@std@@UEAA@XZ ??5?$basic_istream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@AEAN@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@H@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@I@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@PEAV?$basic_streambuf@DU?$char_traits@D@std@@@1@@Z ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@_J@Z ??Bid@locale@std@@QEAA_KXZ ?_Fiopen@std@@YAPEAU_iobuf@@PEB_WHH@Z ?_Getcat@?$codecvt@DDU_Mbstatet@@@std@@SA_KPEAPEBVfacet@locale@2@PEBV42@@Z ?_Getgloballocale@locale@std@@CAPEAV_Locimp@12@XZ ?_Ipfx@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAA_N_N@Z ?_Lock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ ?_Osfx@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAXXZ ?_Unlock@?$basic_streambuf@DU?$char_traits@D@std@@@std@@UEAAXXZ ?_Xbad_alloc@std@@YAXXZ ?_Xlength_error@std@@YAXPEBD@Z ?_Xout_of_range@std@@YAXPEBD@Z ?bad@ios_base@std@@QEBA_NXZ ?clear@?$basic_ios@DU?$char_traits@D@std@@@std@@QEAAXH_N@Z ?eof@ios_base@std@@QEBA_NXZ ?fail@ios_base@std@@QEBA_NXZ ?flush@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@XZ ?getloc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEBA?AVlocale@2@XZ ?good@ios_base@std@@QEBA_NXZ ?id@?$codecvt@DDU_Mbstatet@@@std@@2V0locale@2@A ?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 ?put@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@D@Z ?read@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@PEAD_J@Z ?sbumpc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHXZ ?seekg@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@_JH@Z ?setbuf@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAPEAV12@PEAD_J@Z ?setw@std@@YA?AU?$_Smanip@_J@1@_J@Z ?sgetc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHXZ ?showmanyc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAA_JXZ ?snextc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHXZ ?sputc@?$basic_streambuf@DU?$char_traits@D@std@@@std@@QEAAHD@Z ?sync@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ ?tellg@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAA?AV?$fpos@U_Mbstatet@@@2@XZ ?uflow@?$basic_streambuf@DU?$char_traits@D@std@@@std@@MEAAHXZ ?widen@?$basic_ios@DU?$char_traits@D@std@@@std@@QEBADD@Z ?write@?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV12@PEBD_J@Z ?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

CloseHandle CompareFileTime CreateDirectoryW CreateEventW CreateProcessW CreateThread DeleteCriticalSection DeleteFileW EnterCriticalSection FindClose FindFirstFileW FindNextFileW FindResourceW FormatMessageW FreeLibrary GetCurrentProcess GetCurrentProcessId GetCurrentThreadId GetFileAttributesW GetLastError GetModuleFileNameW GetModuleHandleW GetProcAddress GetStartupInfoW GetSystemTime GetSystemTimeAsFileTime GlobalAlloc GlobalFree GlobalLock GlobalUnlock InitializeCriticalSectionAndSpinCount InitializeSListHead IsDebuggerPresent IsProcessorFeaturePresent LeaveCriticalSection LoadLibraryW LoadResource LocalFree LockResource MoveFileW MultiByteToWideChar QueryPerformanceCounter ResetEvent RtlCaptureContext RtlLookupFunctionEntry RtlVirtualUnwind SetEvent SetUnhandledExceptionFilter SizeofResource TerminateProcess UnhandledExceptionFilter VerSetConditionMask VerifyVersionInfoW WaitForSingleObject WaitForSingleObjectEx WideCharToMultiByte

vcruntime140

_CxxThrowException __C_specific_handler __CxxFrameHandler3 __std_exception_copy __std_exception_destroy __std_terminate memchr memcmp memcpy memmove memset wcsrchr

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

__acrt_iob_func __p__commode __stdio_common_vfprintf __stdio_common_vfscanf __stdio_common_vfwprintf __stdio_common_vsprintf __stdio_common_vswprintf_s _fseeki64 _get_stream_buffer_pointers _set_fmode _wfopen_s fclose fflush fgetc fgetpos fgets fputc fread fsetpos fwrite setvbuf ungetc

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

__p___argc __p___wargv _c_exit _cexit _configure_wide_argv _crt_atexit _exit _get_wide_winmain_command_line _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 abort exit terminate

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

__setusermatherr _dtest ceilf modf

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

_gmtime64 _localtime64 _time64 strftime

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

_lock_file _unlock_file

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

_putenv _wgetenv getenv

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

_strdup strcat strcmp strcpy strlen wcscmp wcscpy wcslen wcsncpy_s

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

_callnewh _set_new_mode free malloc

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

rand

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

wcstol

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

_configthreadlocale

Name

.text

Size

166KB

Virtual Size

166KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

28KB

Virtual Size

27KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

512B

Virtual Size

2KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.pdata

Size

4KB

Virtual Size

4KB

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

33KB

Virtual Size

32KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.reloc

Size

58KB

Virtual Size

117KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Sharing

General

Malware Config

Signatures

File Explorer

2026-09-29_2fc16c391915d7a303b25afb95c401f5_cobalt-strike_mespinoza

PE Signature issue

nss3

user32

gdi32

advapi32

comctl32

ole32

shell32

wininet

shlwapi

msvcp140

kernel32

vcruntime140

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

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

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

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

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

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

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

generic