Behavioral task
behavioral1
Sample
retun.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
retun.exe
Resource
win10v2004-20241007-en
General
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Target
retun.exe
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Size
200.0MB
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MD5
57bfb36b08a68eacecc64d77211b69b9
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SHA1
db6ef4199dc49868b3bf713915057e6721c8b7e5
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SHA256
2f8c8adc872d77bf4cbc46bd3f197fe9a3f71f511b3bb9e8af96f83fd7f509e6
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SHA512
bcb3119f72bda2b9a247bb695154055ad74708eb444d2bd25400847fe8112da9b8210d0df94f71b4daec18776ca1948d8702f17f766234830d0a4dcf811f2f7a
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SSDEEP
196608:1W++z9hoy6EnWLL0kiR+dy/YXsK0hn6ksV5:1WXRWyuPMR+dyLhO5
Malware Config
Signatures
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A stealer written in Python and packaged with Pyinstaller 1 IoCs
resource yara_rule static1/unpack001/�����Y�.pyc blankgrabber -
Blankgrabber family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource retun.exe
Files
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retun.exe.exe windows:6 windows x86 arch:x86
ec4c6449b24c9d32ab43eca7a329e0d7
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
user32
CreateWindowExW
PostMessageW
GetMessageW
MessageBoxW
MessageBoxA
SystemParametersInfoW
DestroyIcon
SetWindowLongW
GetWindowLongW
GetClientRect
InvalidateRect
ReleaseDC
GetDC
DrawTextW
GetDialogBaseUnits
EndDialog
DialogBoxIndirectParamW
MoveWindow
SendMessageW
comctl32
ord380
kernel32
GetACP
IsValidCodePage
GetStringTypeW
GetFileAttributesExW
SetEnvironmentVariableW
FlushFileBuffers
GetCurrentDirectoryW
GetOEMCP
GetCPInfo
GetModuleHandleW
MulDiv
GetLastError
FormatMessageW
GetModuleFileNameW
SetDllDirectoryW
CreateSymbolicLinkW
GetProcAddress
CreateDirectoryW
GetCommandLineW
GetEnvironmentVariableW
ExpandEnvironmentStringsW
GetEnvironmentStringsW
FindClose
FindFirstFileW
FindNextFileW
GetDriveTypeW
RemoveDirectoryW
GetTempPathW
CloseHandle
WaitForSingleObject
Sleep
GetCurrentProcess
GetExitCodeProcess
CreateProcessW
GetStartupInfoW
FreeLibrary
LoadLibraryExW
LocalFree
SetConsoleCtrlHandler
K32EnumProcessModules
K32GetModuleFileNameExW
CreateFileW
FindFirstFileExW
GetFinalPathNameByHandleW
MultiByteToWideChar
WideCharToMultiByte
FreeEnvironmentStringsW
GetProcessHeap
GetTimeZoneInformation
HeapSize
HeapReAlloc
WriteConsoleW
SetEndOfFile
DeleteFileW
SetUnhandledExceptionFilter
IsProcessorFeaturePresent
UnhandledExceptionFilter
DecodePointer
TerminateProcess
QueryPerformanceCounter
GetCurrentProcessId
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
IsDebuggerPresent
RtlUnwind
SetLastError
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
EncodePointer
RaiseException
GetCommandLineA
GetFileInformationByHandle
GetFileType
PeekNamedPipe
SystemTimeToTzSpecificLocalTime
FileTimeToSystemTime
ReadFile
GetFullPathNameW
SetStdHandle
GetStdHandle
WriteFile
ExitProcess
GetModuleHandleExW
HeapFree
GetConsoleMode
ReadConsoleW
SetFilePointerEx
GetConsoleOutputCP
GetFileSizeEx
HeapAlloc
CompareStringW
LCMapStringW
advapi32
OpenProcessToken
GetTokenInformation
ConvertStringSecurityDescriptorToSecurityDescriptorW
ConvertSidToStringSidW
gdi32
SelectObject
DeleteObject
CreateFontIndirectW
Sections
.text Size: 150KB - Virtual size: 149KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 53KB - Virtual size: 53KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 3KB - Virtual size: 26KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 14KB - Virtual size: 14KB
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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�����Y�.pyc