Static task
static1
Behavioral task
behavioral1
Sample
Nulloy.sfx.exe
Resource
win7-20230824-en
Behavioral task
behavioral2
Sample
Nulloy.sfx.exe
Resource
win10-20230703-en
Behavioral task
behavioral3
Sample
Nulloy.sfx.exe
Resource
win10v2004-20230703-en
General
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Target
Nulloy.sfx.exe
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Size
82.3MB
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MD5
7e7d3f2f89b4728851d9ddb1d6bd74ce
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SHA1
b58fcf7a7c1445256358bd473d9d7b3a0a03350d
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SHA256
ea0ac0d50ac54f822dfb461182db3a72edaf1c863e9463e0c08f090ad7d64059
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SHA512
1e1885428ce4440d628a02c6f880bd23a373fc52a2622d34ba3d8ba7bb0ef50099d9bf88d8ff7d75778d9cbf606c5a4724e4d2bbec40ae7afa3db2c691cd0088
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SSDEEP
1572864:zrwyCK3B9p/dU+QPRlT4HW0v7D2RsUBnQEHEKxlML6XbN+n7Ea0N6psBLcYvIgzR:R7XURiHWI7D+3f1lMLgwn7/m6pi9t
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Nulloy.sfx.exe
Files
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Nulloy.sfx.exe.exe windows x86
fa8d20faea9ef7b4e2b7fbfe93442593
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_32BIT_MACHINE
Imports
kernel32
GetLastError
SetLastError
FormatMessageW
GetFileType
GetStdHandle
WriteFile
ReadFile
FlushFileBuffers
SetEndOfFile
SetFilePointer
SetFileTime
CloseHandle
CreateFileW
GetCurrentProcessId
CreateDirectoryW
SetFileAttributesW
GetFileAttributesW
DeleteFileW
MoveFileW
FindClose
FindFirstFileW
FindNextFileW
GetVersionExW
GetCurrentDirectoryW
GetFullPathNameW
FoldStringW
GetModuleFileNameW
GetModuleHandleW
FindResourceW
FreeLibrary
GetProcAddress
ExitProcess
SetThreadExecutionState
Sleep
LoadLibraryW
GetSystemDirectoryW
CompareStringW
AllocConsole
FreeConsole
AttachConsole
WriteConsoleW
SystemTimeToTzSpecificLocalTime
TzSpecificLocalTimeToSystemTime
SystemTimeToFileTime
LocalFileTimeToFileTime
FileTimeToSystemTime
GetCPInfo
IsDBCSLeadByte
MultiByteToWideChar
WideCharToMultiByte
GlobalAlloc
LockResource
GlobalLock
GlobalUnlock
GlobalFree
LoadResource
SizeofResource
SetCurrentDirectoryW
GetTimeFormatW
GetDateFormatW
LocalFree
GetCurrentProcess
GetExitCodeProcess
WaitForSingleObject
GetLocalTime
GetTickCount
MapViewOfFile
UnmapViewOfFile
CreateFileMappingW
OpenFileMappingW
GetCommandLineW
SetEnvironmentVariableW
ExpandEnvironmentStringsW
GetTempPathW
MoveFileExW
GetLocaleInfoW
GetNumberFormatW
GetOEMCP
DecodePointer
SetFilePointerEx
GetConsoleMode
GetConsoleCP
HeapSize
SetStdHandle
GetProcessHeap
FreeEnvironmentStringsW
GetEnvironmentStringsW
RaiseException
GetSystemInfo
VirtualProtect
VirtualQuery
LoadLibraryExA
IsProcessorFeaturePresent
IsDebuggerPresent
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetStartupInfoW
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
TerminateProcess
RtlUnwind
EncodePointer
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
LoadLibraryExW
QueryPerformanceFrequency
GetModuleHandleExW
GetModuleFileNameA
GetACP
HeapFree
HeapAlloc
HeapReAlloc
GetStringTypeW
LCMapStringW
FindFirstFileExA
FindNextFileA
IsValidCodePage
GetCommandLineA
oleaut32
VariantClear
gdiplus
GdipCreateBitmapFromStream
GdipAlloc
GdipCloneImage
GdipDisposeImage
GdipCreateBitmapFromStreamICM
GdipCreateHBITMAPFromBitmap
GdiplusStartup
GdiplusShutdown
GdipFree
Sections
.text Size: 159KB - Virtual size: 159KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 42KB - Virtual size: 41KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 4KB - Virtual size: 215KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.didat Size: 512B - Virtual size: 376B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 56KB - Virtual size: 55KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 10KB - Virtual size: 10KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ