Behavioral task
behavioral1
Sample
Okuru.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
Okuru.exe
Resource
win10v2004-20231215-en
General
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Target
Okuru.exe
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Size
57.6MB
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MD5
1b15c295b35c4095cb61c71f7a80e23a
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SHA1
dc07533ebcb50d84622052d0f386be0e201581b7
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SHA256
4c11b17871cf949b7ca4edf8146679d062ad11cd5ccc41a50d49c10adc3d9d5f
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SHA512
70446e25e86879d3f71d8b9f3ae20da4e39bc1821f9d811a41f31edb7337772929f452e178f247b30bddeff3d9971a081e1c0ccaa45ad299b995e13e256d9f20
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SSDEEP
1572864:ecc//y1UmcC3vFUReCUMitZy7erJmBoF9bi8w51Acl8pNecIBLc:eLEUmcgF0tiWyrJhziznzlwNpI
Malware Config
Signatures
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Detects Pyinstaller 1 IoCs
resource yara_rule sample pyinstaller -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Okuru.exe
Files
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Okuru.exe.exe windows:5 windows x86 arch:x86
22604f514dda14fc9e9e932cbc54e1b0
Headers
DLL Characteristics
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
IMAGE_FILE_32BIT_MACHINE
Imports
kernel32
GetCommandLineW
GetEnvironmentVariableW
SetEnvironmentVariableW
ExpandEnvironmentStringsW
CreateDirectoryW
GetTempPathW
WaitForSingleObject
Sleep
GetExitCodeProcess
CreateProcessW
GetStartupInfoW
LoadLibraryExW
SetConsoleCtrlHandler
FindClose
FindFirstFileExW
CloseHandle
GetCurrentProcess
LocalFree
FormatMessageW
MultiByteToWideChar
WideCharToMultiByte
SetEndOfFile
GetProcAddress
GetModuleFileNameW
SetDllDirectoryW
FreeLibrary
GetLastError
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
GetModuleHandleW
RtlUnwind
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
EncodePointer
RaiseException
GetCommandLineA
CreateFileW
GetDriveTypeW
GetFileInformationByHandle
GetFileType
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
GetFullPathNameW
RemoveDirectoryW
FindNextFileW
SetStdHandle
DeleteFileW
ReadFile
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
HeapFree
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleOutputCP
GetFileSizeEx
HeapAlloc
CompareStringW
LCMapStringW
GetCurrentDirectoryW
FlushFileBuffers
HeapReAlloc
GetFileAttributesExW
GetStringTypeW
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
GetEnvironmentStringsW
FreeEnvironmentStringsW
GetProcessHeap
GetTimeZoneInformation
HeapSize
WriteConsoleW
DecodePointer
advapi32
ConvertSidToStringSidW
GetTokenInformation
OpenProcessToken
ConvertStringSecurityDescriptorToSecurityDescriptorW
Sections
.text Size: 148KB - Virtual size: 147KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 55KB - Virtual size: 54KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 62KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 119KB - Virtual size: 118KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 7KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
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_module_importer.pyc