FastClient[.]exe | Triage™

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General

Target
FastClient.exe
Size 37.5MB
Sample260803-rc4ekssvb1
SHA256 222e843b930f3af4626d9eb1086fc1ca31dc84393114efd36d302dc9d247f278
MD5 96399655d8fcb565278e5affe2e19449
SHA1 aba72ad16477784ab798b7b9190a16e8694fc5aa
SHA512 f2d1cf0e568df35a7f7aa89cc419e31f567f3e58f4a9fe4438d17c31f308bac2a32be7d779033373068d5b1cc34d1cb306b1a067c0ba21faf55d95c6b5b280f6
SSDEEP 786432:bAsIRgVyUUhcdGgbp3vjsaF9uCZwxIodonr:ssI6VQhcdHF3vQQ9uFxRdonr
TLSH
T18287DF13F65151EDC06EC175934A9232FBB1BC8A47347AEB5BE04B212E69FD06B38709
MD5 SHA1 SHA512 SSDEEP TLSH

Score

1^/10

Malware Config

Signatures

File Explorer

FastClient.exe

.exe 37.5MB

FastClient.exe

IMPHASH 1efadf76af1b68c2433207216872e1cc
SHA256 222e843b930f3af4626d9eb1086fc1ca31dc84393114efd36d302dc9d247f278
MD5 96399655d8fcb565278e5affe2e19449
SHA1 aba72ad16477784ab798b7b9190a16e8694fc5aa
SHA512 f2d1cf0e568df35a7f7aa89cc419e31f567f3e58f4a9fe4438d17c31f308bac2a32be7d779033373068d5b1cc34d1cb306b1a067c0ba21faf55d95c6b5b280f6
SSDEEP 786432:bAsIRgVyUUhcdGgbp3vjsaF9uCZwxIodonr:ssI6VQhcdHF3vQQ9uFxRdonr
TLSH
T18287DF13F65151EDC06EC175934A9232FBB1BC8A47347AEB5BE04B212E69FD06B38709
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

Digest

a3:b7:c0:de:0c:a9:53:a4:d2:f9:58:6b:5f:df:df:77:0e:a5:bc:45:e8:19:6a:aa:30:1b:75:b1:93:3e:12:25

Digest Algorithm

sha256

PE Digests Matches

Trusted

Signing Certificate

SERIALNUMBER=J2026008005007,CN=2EASY S.R.L.,O=2EASY S.R.L.,L=București,C=RO,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.3=#1302524f

Chains

Jul 26, 2026

SERIALNUMBER=J2026008005007,CN=2EASY S.R.L.,O=2EASY S.R.L.,L=București,C=RO,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.3=#1302524f

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

SERIALNUMBER=J2026008005007,CN=2EASY S.R.L.,O=2EASY S.R.L.,L=București,C=RO,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.3=#1302524f

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

CN=DigiCert Trusted Root G4,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 Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Serial Number

08:ad:40:b2:60:d2:9c:4c:9f:5e:cd:a9:bd:93:ae:d9

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

Apr 29, 2021 - Apr 28, 2036

Subject

SERIALNUMBER=J2026008005007,CN=2EASY S.R.L.,O=2EASY S.R.L.,L=București,C=RO,2.5.4.15=#131450726976617465204f7267616e697a6174696f6e,1.3.6.1.4.1.311.60.2.1.3=#1302524f

Serial Number

06:17:01:57:3f:15:12:82:6c:8a:6f:e1:3b:e0:c3:32

Issuer

CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1,O=DigiCert\, Inc.,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageCodeSigning

Revocation Status

Not revoked

Timespan

Feb 24, 2026 - Feb 26, 2027

Subject

CN=DigiCert SHA256 RSA4096 Timestamp Responder 2025 1,O=DigiCert\, Inc.,C=US

Serial Number

0a:80:ef:18:4b:8d:f1:05:82:d1:c4:76:a7:95:74:68

Issuer

CN=DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1,O=DigiCert\, Inc.,C=US

Key Usages

KeyUsageDigitalSignature

Ext Key Usages

ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

Jun 4, 2025 - Sep 3, 2036

Subject

CN=DigiCert Trusted G4 TimeStamping RSA4096 SHA256 2025 CA1,O=DigiCert\, Inc.,C=US

Serial Number

0d:c7:ac:57:05:ff:21:99:2e:40:43:22:0c:3a:49:86

Issuer

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Key Usages

KeyUsageDigitalSignature, KeyUsageCertSign, KeyUsageCRLSign

Ext Key Usages

ExtKeyUsageTimeStamping

Revocation Status

Not revoked

Timespan

May 7, 2025 - Jan 14, 2038

Subject

CN=DigiCert Trusted Root G4,OU=www.digicert.com,O=DigiCert Inc,C=US

Serial Number

0e:9b:18:8e:f9:d0:2d:e7:ef:db:50:e2:08:40:18:5a

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

Aug 1, 2022 - Nov 9, 2031

Minor OS version

Major OS version

Entry point

11441700

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

FastClient.pdb

kernel32

GetCurrentProcess DuplicateHandle CreatePipe WaitForSingleObject GlobalMemoryStatusEx GetModuleHandleW GetCurrentThreadId FormatMessageW LoadLibraryExA GetLastError IsProcessorFeaturePresent ReleaseSRWLockExclusive SetHandleInformation AcquireSRWLockExclusive WakeAllConditionVariable SleepConditionVariableSRW GetSystemTimeAsFileTime LocalFree MoveFileExW CreateFileW SetNamedPipeHandleState TlsAlloc GetSystemInfo GetOverlappedResult PostQueuedCompletionStatus ReadFile WriteFile CancelIoEx CreateIoCompletionPort SetFileCompletionNotificationModes GetQueuedCompletionStatusEx GetCurrentProcessId TlsGetValue GetProcessTimes OpenProcess TlsSetValue TlsFree GetExitCodeProcess GetSystemTimes IsDebuggerPresent GetProcessIoCounters FindFirstVolumeW Sleep GetModuleHandleA FindNextVolumeW FindVolumeClose GetVolumePathNamesForVolumeNameW GetDriveTypeW GetVolumeInformationW DeviceIoControl GetDiskFreeSpaceExW RtlPcToFileHeader CreateEventW LoadLibraryA GetUserDefaultUILanguage LCIDToLocaleName LoadLibraryW CloseHandle RaiseException EncodePointer HeapFree GetTimeZoneInformationForYear SystemTimeToFileTime SystemTimeToTzSpecificLocalTime ReadProcessMemory HeapAlloc FreeLibrary LoadLibraryExW GetModuleFileNameW OutputDebugStringW OutputDebugStringA VirtualQueryEx GetProcessHeap GetProcAddress lstrlenW SetUnhandledExceptionFilter UnhandledExceptionFilter InitializeSListHead InitializeCriticalSectionAndSpinCount DeleteCriticalSection K32GetPerformanceInfo GetFileAttributesW GetEnvironmentVariableW GetFileInformationByHandle CompareStringOrdinal FreeEnvironmentStringsW WriteFileEx SleepEx SetLastError GetFullPathNameW SetFileInformationByHandle SetFileTime HeapReAlloc QueryPerformanceFrequency QueryPerformanceCounter CreateThread ReadFileEx FlushFileBuffers GetSystemTimePreciseAsFileTime CancelIo GetFileInformationByHandleEx GetEnvironmentStringsW GetSystemDirectoryW GetWindowsDirectoryW CreateProcessW GetProcessId TerminateProcess GetStdHandle CreateDirectoryW SetFilePointerEx AddVectoredExceptionHandler SetThreadStackGuarantee GetCurrentThread GetCurrentDirectoryW GetCommandLineW RemoveDirectoryW CopyFileExW FindFirstFileExW FindClose ExitProcess SwitchToThread WideCharToMultiByte WaitForSingleObjectEx CreateMutexA ReleaseMutex GetFinalPathNameByHandleW CreateSymbolicLinkW DeleteFileW SetEnvironmentVariableW MultiByteToWideChar WriteConsoleW GetConsoleMode GetConsoleOutputCP CreateWaitableTimerExW SetWaitableTimer WaitForMultipleObjects GetTempPathW FindNextFileW

advapi32

OpenProcessToken GetTokenInformation RegQueryValueExW RegCreateKeyTransactedW RegCreateKeyExW RegOpenKeyTransactedW RegOpenKeyExW SystemFunction036 RegCloseKey IsValidSid GetLengthSid CopySid EventRegister EventSetInformation EventWriteTransfer EventUnregister RegGetValueW

oleaut32

SysFreeString GetErrorInfo SetErrorInfo SysStringLen

ntdll

NtCreateFile RtlUnwindEx NtDeviceIoControlFile RtlNtStatusToDosError NtCancelIoFileEx NtCreateNamedPipeFile NtOpenFile NtWriteFile RtlLookupFunctionEntry RtlCaptureContext NtReadFile RtlGetVersion RtlVirtualUnwind NtQuerySystemInformation NtQueryInformationProcess

comctl32

RemoveWindowSubclass SetWindowSubclass DefSubclassProc TaskDialogIndirect

user32

ShowCursor GetMenu SetPropW SystemParametersInfoA DestroyIcon SetCapture ReleaseCapture RegisterRawInputDevices GetRawInputData DestroyMenu CheckMenuItem RemoveMenu CreatePopupMenu CreateMenu SetMenuItemInfoW AppendMenuW InsertMenuW PostQuitMessage CreateAcceleratorTableW IsWindowVisible DrawTextW MsgWaitForMultipleObjectsEx GetClipCursor RegisterWindowMessageA GetWindowDC OffsetRect SetParent MapWindowPoints SetFocus GetMenuBarInfo DrawIconEx TrackMouseEvent GetTouchInputInfo CloseTouchInputHandle GetActiveWindow RegisterTouchWindow EnableWindow ClipCursor GetDC IsProcessDPIAware SetWindowRgn FindWindowExW GetWindowLongPtrW GetParent GetMenuItemInfoW DrawMenuBar SetWindowLongPtrW IsWindowEnabled MapVirtualKeyW GetWindow SetMenu GetKeyState GetSystemMenu ToUnicodeEx GetKeyboardLayout EnableMenuItem SetWindowLongW MapVirtualKeyExW GetWindowRect GetAsyncKeyState GetKeyboardState SetTimer ShowWindow SendInput TrackPopupMenu KillTimer RegisterClassW ReleaseDC DestroyAcceleratorTable TranslateAcceleratorW DispatchMessageA GetMessageA EnumChildWindows RegisterClassExW GetForegroundWindow CreateIcon IsWindow CreateWindowExW EnumDisplayMonitors AdjustWindowRectEx UpdateWindow InvalidateRect SetCursorPos GetUpdateRect ValidateRect GetMonitorInfoW MonitorFromWindow GetCursorPos MonitorFromRect SystemParametersInfoW MonitorFromPoint FillRect SetWindowTextW GetSystemMetrics ClientToScreen GetClientRect GetWindowLongW ScreenToClient IsIconic SendMessageW AdjustWindowRect SetWindowDisplayAffinity DestroyWindow SetCursor LoadCursorW InvalidateRgn SetWindowPos GetWindowPlacement SetWindowPlacement PeekMessageW ChangeDisplaySettingsExW FlashWindowEx GetWindowTextW GetWindowTextLengthW DefWindowProcW RedrawWindow PostThreadMessageW PostMessageW SetForegroundWindow DispatchMessageW TranslateMessage GetMessageW

ws2_32

freeaddrinfo WSAStartup WSACleanup select getaddrinfo getpeername getsockopt accept getsockname recv WSASend send setsockopt ioctlsocket connect sendto WSASocketW bind listen shutdown WSAIoctl WSADuplicateSocketW WSAGetLastError socket closesocket

gdi32

CreateDIBSection CreateSolidBrush DeleteObject CombineRgn BitBlt SetBkMode SetTextColor CreateCompatibleDC GetDeviceCaps DeleteDC SelectObject CreateRectRgn

api-ms-win-core-synch-l1-2-0

WakeByAddressAll WakeByAddressSingle WaitOnAddress

bcryptprimitives

ProcessPrng

shell32

ShellExecuteW SHCreateItemFromParsingName SHAppBarMessage CommandLineToArgvW DragFinish DragQueryFileW Shell_NotifyIconGetRect Shell_NotifyIconW SHGetKnownFolderPath ord155 ShellExecuteExW ord190 SHOpenFolderAndSelectItems

secur32

FreeCredentialsHandle InitializeSecurityContextW DeleteSecurityContext QueryContextAttributesW FreeContextBuffer AcceptSecurityContext ApplyControlToken EncryptMessage DecryptMessage AcquireCredentialsHandleA

crypt32

CertSetCertificateContextProperty CertDuplicateCertificateContext CertGetCertificateChain CertVerifyCertificateChainPolicy CertFreeCertificateContext CertCreateCertificateChainEngine CertFreeCertificateChain CertDuplicateCertificateChain CertAddCertificateContextToStore CertOpenStore CertAddEncodedCertificateToStore CertDuplicateStore CertFreeCertificateChainEngine CertEnumCertificatesInStore CertCloseStore

bcrypt

BCryptGenRandom

ole32

CoInitializeEx CoTaskMemAlloc CoTaskMemFree CoUninitialize RegisterDragDrop OleInitialize CoCreateInstance RevokeDragDrop CoInitialize CoCreateFreeThreadedMarshaler

dwmapi

DwmEnableBlurBehindWindow DwmGetWindowAttribute DwmSetWindowAttribute

shlwapi

SHCreateMemStream

pdh

PdhAddEnglishCounterW PdhEnumObjectsA PdhCollectQueryData PdhOpenQueryA PdhCloseQuery PdhGetFormattedCounterValue PdhRemoveCounter

powrprof

CallNtPowerInformation

psapi

GetModuleFileNameExW

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

pow floorf trunc roundf __setusermatherr log2 floor round

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

abort _initialize_narrow_environment _initterm _configure_narrow_argv terminate _crt_atexit _set_app_type _seh_filter_exe __p___argc _register_onexit_function _initialize_onexit_table _initterm_e _register_thread_local_exe_atexit_callback _c_exit exit _exit _cexit __p___argv _get_initial_narrow_environment _wassert

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

malloc _set_new_mode _callnewh calloc free

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

wcsncmp wcscmp wcsncat strlen _wcsicmp strcmp strcpy_s wcslen

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

_wtoi wcstol _ultow_s

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

__p__commode _set_fmode

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

_configthreadlocale

Sharing

General

Malware Config

Signatures

File Explorer

FastClient.exe

kernel32

advapi32

oleaut32

ntdll

comctl32

user32

ws2_32

gdi32

api-ms-win-core-synch-l1-2-0

bcryptprimitives

shell32

secur32

crypt32

bcrypt

ole32

dwmapi

shlwapi

pdh

powrprof

psapi

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

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

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

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

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

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

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

generic