Static task
static1
Behavioral task
behavioral1
Sample
ybuffopp.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
ybuffopp.exe
Resource
win10v2004-20231020-en
General
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Target
ybuffopp.exe
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Size
10.4MB
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MD5
d7d9d02408f50abb6d617ef2562fe111
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SHA1
77fb7178ec98a39f07a67610f8016e3c9c56b389
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SHA256
c11aaab9d7d4572b924e151049d8c0049fbf9b62c65b0885668ac373c18f78a1
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SHA512
c6ddc29baec43377ae0fa7c6fc8b69427b3a0e2c1cb778259626bbce4e1affbedb6a41f2005a74b939bb5a4601f6946dff65a8239f30617ad2e31e80e217bd95
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SSDEEP
3072:WwX5qj4TlLF3OY19GUzsgw8M5m7bLbK2qeqvJlUDbEkN1DcqXW5kaA68frA:jQj4TlLl919GUu63xqPR+DYK1D7aX
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource ybuffopp.exe
Files
-
ybuffopp.exe.exe windows:5 windows x86
780437e8c81fd22a5669fb9201842564
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
kernel32
DeleteVolumeMountPointA
GlobalAddAtomA
GetCommState
GetConsoleAliasA
GetTickCount
ReadDirectoryChangesW
GetWindowsDirectoryA
GetVolumePathNameW
WideCharToMultiByte
LoadLibraryW
ReadConsoleInputA
FreeConsole
GetSystemWindowsDirectoryA
GetConsoleAliasExesLengthW
EnumSystemCodePagesA
IsProcessorFeaturePresent
SetComputerNameExW
GetConsoleAliasesW
InterlockedExchange
FillConsoleOutputCharacterW
GetLastError
SetLastError
BackupRead
GetProcAddress
FindResourceExW
PeekConsoleInputW
CreateNamedPipeA
RemoveDirectoryA
LocalAlloc
SetConsoleCtrlHandler
GetNumberFormatW
RemoveDirectoryW
FoldStringW
GetOEMCP
DebugSetProcessKillOnExit
GetModuleHandleA
UpdateResourceW
FreeEnvironmentStringsW
VirtualProtect
AddConsoleAliasA
SetFileAttributesW
LocalFileTimeToFileTime
CreateFileA
WriteConsoleW
PeekNamedPipe
FindFirstFileW
VirtualAlloc
SetPriorityClass
GetConsoleOutputCP
WriteConsoleA
HeapFree
GetModuleHandleW
Sleep
ExitProcess
GetStartupInfoW
GetCPInfo
InterlockedIncrement
InterlockedDecrement
GetACP
IsValidCodePage
TlsGetValue
TlsAlloc
TlsSetValue
TlsFree
GetCurrentThreadId
HeapAlloc
RaiseException
HeapCreate
VirtualFree
DeleteCriticalSection
LeaveCriticalSection
EnterCriticalSection
HeapReAlloc
HeapSize
MultiByteToWideChar
ReadFile
TerminateProcess
GetCurrentProcess
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
SetHandleCount
GetStdHandle
GetFileType
GetStartupInfoA
SetFilePointer
WriteFile
GetModuleFileNameA
LoadLibraryA
InitializeCriticalSectionAndSpinCount
GetModuleFileNameW
GetEnvironmentStringsW
GetCommandLineW
QueryPerformanceCounter
GetCurrentProcessId
GetSystemTimeAsFileTime
LCMapStringA
LCMapStringW
GetStringTypeA
GetStringTypeW
GetLocaleInfoA
RtlUnwind
SetStdHandle
GetConsoleCP
GetConsoleMode
FlushFileBuffers
CloseHandle
user32
LoadMenuW
CharToOemBuffW
ChangeDisplaySettingsA
gdi32
GetCharWidthA
GetCharABCWidthsFloatA
GetBitmapDimensionEx
ole32
StringFromIID
Sections
.text Size: 166KB - Virtual size: 165KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 8KB - Virtual size: 716KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 69KB - Virtual size: 69KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 10.2MB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ