osk[.]exe | Triage™

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General

Target
osk.exe
Size 5.4MB
Sample260731-p7mn7stybz
SHA256 3036c7debc5134b4bae9040e25f9810505fbed3ae53417a84deba285218b8c2d
MD5 e344d73645c8cf67245fc17b0ea1861c
SHA1 9701868b66a5062e1c9ff209320fc94627852f0e
SHA512 acb50aad7d1df1f372b52f9e7d4b20a7a264041df9d7fbf430f1f08dc59c4e5be0813d66e46a8cb3976e2a1da89a00e3b07b1a55ab9d68fee56b6ded4a3f42e5
SSDEEP 98304:e1gt1TICDtPfeE/jowqK5LN1KQ0oTh2M9QrABlolllzHbMrwh6ay:R1TICteErownP0oTcMsABqlGUc/
TLSH
T1AA463304A3A808E2FAB3D13981565621D973B4254BF0D1CF43AC97662F677E0AF3BB54
MD5 SHA1 SHA512 SSDEEP TLSH

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
osk.exe

File Explorer

osk.exe

.exe 5.4MB
cryptor.pyc

15KB

osk.exe

IMPHASH cf72283be50852e418ce6bbb6b645835
SHA256 3036c7debc5134b4bae9040e25f9810505fbed3ae53417a84deba285218b8c2d
MD5 e344d73645c8cf67245fc17b0ea1861c
SHA1 9701868b66a5062e1c9ff209320fc94627852f0e
SHA512 acb50aad7d1df1f372b52f9e7d4b20a7a264041df9d7fbf430f1f08dc59c4e5be0813d66e46a8cb3976e2a1da89a00e3b07b1a55ab9d68fee56b6ded4a3f42e5
SSDEEP 98304:e1gt1TICDtPfeE/jowqK5LN1KQ0oTh2M9QrABlolllzHbMrwh6ay:R1TICteErownP0oTcMsABqlGUc/
TLSH
T1AA463304A3A808E2FAB3D13981565621D973B4254BF0D1CF43AC97662F677E0AF3BB54
MD5 SHA1 SHA512 SSDEEP TLSH

windows:6 windows x64 arch:x64

Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

Major OS version

Entry point

57632

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

user32

CreateWindowExW ShutdownBlockReasonCreate MsgWaitForMultipleObjects ShowWindow DestroyWindow RegisterClassW DefWindowProcW PeekMessageW DispatchMessageW TranslateMessage GetMonitorInfoW MonitorFromPoint GetCursorPos GetSystemMetrics PostMessageW GetMessageW MessageBoxW MessageBoxA SystemParametersInfoW DestroyIcon SetWindowLongPtrW GetWindowLongPtrW GetClientRect InvalidateRect ReleaseDC GetDC DrawTextW GetDialogBaseUnits EndDialog DialogBoxIndirectParamW MoveWindow SendMessageW

comctl32

ord380

kernel32

GetACP IsValidCodePage GetStringTypeW GetFileAttributesExW SetEnvironmentVariableW FlushFileBuffers LCMapStringW CompareStringW VirtualProtect GetCurrentDirectoryW HeapAlloc GetFileSizeEx GetConsoleOutputCP GetOEMCP GetCPInfo GetLastError FreeLibrary GetProcAddress LoadLibraryExW GetModuleHandleW MulDiv FormatMessageW GetModuleFileNameW GetEnvironmentStringsW CreateSymbolicLinkW SetErrorMode CreateDirectoryW GetCommandLineW GetEnvironmentVariableW ExpandEnvironmentStringsW DeleteFileW FindClose FindFirstFileW FindNextFileW GetDriveTypeW RemoveDirectoryW GetTempPathW CloseHandle QueryPerformanceCounter QueryPerformanceFrequency WaitForSingleObject Sleep GetCurrentProcess TerminateProcess GetExitCodeProcess CreateProcessW GetStartupInfoW LocalFree SetConsoleCtrlHandler K32EnumProcessModules K32GetModuleFileNameExW CreateFileW FindFirstFileExW GetFinalPathNameByHandleW MultiByteToWideChar WideCharToMultiByte SetFilePointerEx FreeEnvironmentStringsW GetProcessHeap GetTimeZoneInformation HeapSize HeapReAlloc WriteConsoleW SetEndOfFile SetDllDirectoryW GetCurrentProcessId GetCurrentThreadId GetSystemTimeAsFileTime InitializeSListHead SetUnhandledExceptionFilter RtlUnwindEx SetLastError FlsAlloc FlsGetValue FlsSetValue FlsFree EnterCriticalSection LeaveCriticalSection InitializeCriticalSectionEx DeleteCriticalSection RtlLookupFunctionEntry EncodePointer RaiseException RtlPcToFileHeader GetCommandLineA GetFileInformationByHandle GetFileType PeekNamedPipe SystemTimeToTzSpecificLocalTime FileTimeToSystemTime ReadFile GetFullPathNameW SetStdHandle GetStdHandle WriteFile ExitProcess GetModuleHandleExW IsProcessorFeaturePresent RtlCaptureContext RtlVirtualUnwind IsDebuggerPresent UnhandledExceptionFilter HeapFree GetConsoleMode ReadConsoleW

advapi32

OpenProcessToken GetTokenInformation ConvertStringSecurityDescriptorToSecurityDescriptorW ConvertSidToStringSidW

gdi32

SelectObject DeleteObject CreateFontIndirectW

Name

.text

Size

178KB

Virtual Size

177KB

Characteristics

IMAGE_SCN_CNT_CODE IMAGE_SCN_MEM_EXECUTE IMAGE_SCN_MEM_READ

Name

.rdata

Size

79KB

Virtual Size

79KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Name

.data

Size

3KB

Virtual Size

18KB

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

.fptable

Size

512B

Virtual Size

256B

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ IMAGE_SCN_MEM_WRITE

Name

.reloc

Size

2KB

Virtual Size

1KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_DISCARDABLE IMAGE_SCN_MEM_READ

Name

.rsrc

Size

61KB

Virtual Size

64KB

Characteristics

IMAGE_SCN_CNT_INITIALIZED_DATA IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

File Explorer

osk.exe

user32

comctl32

kernel32

advapi32

gdi32

generic

cryptor.pyc