Static task
static1
Behavioral task
behavioral1
Sample
NEAS.2023-09-05_fa12972b8fd4e302e1791c4d080498a9_ryuk_JC.exe
Resource
win7-20231025-en
Behavioral task
behavioral2
Sample
NEAS.2023-09-05_fa12972b8fd4e302e1791c4d080498a9_ryuk_JC.exe
Resource
win10v2004-20231023-en
General
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Target
NEAS.2023-09-05_fa12972b8fd4e302e1791c4d080498a9_ryuk_JC.exe
-
Size
21.4MB
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MD5
fa12972b8fd4e302e1791c4d080498a9
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SHA1
b0b7deea8d40217b6861f3bfd92cf6bb789a9824
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SHA256
648e8149105b8091860f47d8d81ab0e66ebc1f477b5cc2ad0c606962ac0bd4eb
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SHA512
4bcc74f33bc0853cb8e71a393460fdaa69e76a73c6bd28166eb56d12fba9c2cf3f914ef2f58628d1b9fcbd0dde0d13e6b61e5fc5a5bf3c273c5bb23219cccd74
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMk:9nwngnwnBRT
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource NEAS.2023-09-05_fa12972b8fd4e302e1791c4d080498a9_ryuk_JC.exe
Files
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NEAS.2023-09-05_fa12972b8fd4e302e1791c4d080498a9_ryuk_JC.exe.exe windows:4 windows x86
12fcd3183e0fb67f1e38925ed5c0c47c
Headers
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_BYTES_REVERSED_LO
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_BYTES_REVERSED_HI
Imports
kernel32
DeleteCriticalSection
LeaveCriticalSection
EnterCriticalSection
InitializeCriticalSection
VirtualFree
VirtualAlloc
LocalFree
LocalAlloc
GetVersion
GetCurrentThreadId
InterlockedDecrement
InterlockedIncrement
VirtualQuery
WideCharToMultiByte
MultiByteToWideChar
lstrlenA
lstrcpynA
LoadLibraryExA
GetThreadLocale
GetStartupInfoA
GetProcAddress
GetModuleHandleA
GetModuleFileNameA
GetLocaleInfoA
GetCommandLineA
FreeLibrary
FindFirstFileA
FindClose
ExitProcess
ExitThread
CreateThread
WriteFile
UnhandledExceptionFilter
RtlUnwind
RaiseException
GetStdHandle
TlsSetValue
TlsGetValue
LocalAlloc
GetModuleHandleA
lstrcpyA
WritePrivateProfileStringA
WriteFile
WinExec
WaitForSingleObject
VirtualQuery
VirtualAlloc
UnmapViewOfFile
Sleep
SizeofResource
SetThreadLocale
SetFilePointer
SetFileAttributesA
SetEvent
SetErrorMode
SetEndOfFile
ResumeThread
ResetEvent
ReadFile
MultiByteToWideChar
MulDiv
MoveFileA
MapViewOfFile
LockResource
LocalFree
LoadResource
LoadLibraryA
LeaveCriticalSection
InitializeCriticalSection
GlobalUnlock
GlobalReAlloc
GlobalHandle
GlobalLock
GlobalFree
GlobalFindAtomA
GlobalDeleteAtom
GlobalAlloc
GlobalAddAtomA
GetVersionExA
GetVersion
GetTickCount
GetThreadLocale
GetTempPathA
GetSystemInfo
GetSystemDirectoryA
GetStringTypeA
GetStdHandle
GetShortPathNameA
GetProcAddress
GetPrivateProfileStringA
GetModuleHandleA
GetModuleFileNameA
GetLogicalDriveStringsA
GetLocaleInfoA
GetLocalTime
GetLastError
GetFullPathNameA
GetFileAttributesA
GetExitCodeThread
GetDriveTypeA
GetDiskFreeSpaceA
GetDateFormatA
GetCurrentThreadId
GetCurrentProcessId
GetCPInfo
GetACP
FreeResource
InterlockedIncrement
InterlockedExchange
InterlockedDecrement
FreeLibrary
FormatMessageA
FindResourceA
FindNextFileA
FindFirstFileA
FindClose
FileTimeToLocalFileTime
FileTimeToDosDateTime
EnumCalendarInfoA
EnterCriticalSection
DeleteFileA
DeleteCriticalSection
CreateThread
CreateFileA
CreateEventA
CopyFileA
CompareStringA
CloseHandle
Sleep
user32
GetKeyboardType
LoadStringA
MessageBoxA
CharNextA
CreateWindowExA
WindowFromPoint
WinHelpA
WaitMessage
UpdateWindow
UnregisterClassA
UnhookWindowsHookEx
TranslateMessage
TranslateMDISysAccel
TrackPopupMenu
SystemParametersInfoA
ShowWindow
ShowScrollBar
ShowOwnedPopups
ShowCursor
SetWindowsHookExA
SetWindowTextA
SetWindowPos
SetWindowPlacement
SetWindowLongA
SetTimer
SetScrollRange
SetScrollPos
SetScrollInfo
SetRect
SetPropA
SetParent
SetMenuItemInfoA
SetMenu
SetForegroundWindow
SetFocus
SetCursor
SetClipboardData
SetClassLongA
SetCapture
SetActiveWindow
SendMessageA
ScrollWindow
ScreenToClient
RemovePropA
RemoveMenu
ReleaseDC
ReleaseCapture
RegisterClipboardFormatA
RegisterClipboardFormatA
RegisterClassA
RedrawWindow
PtInRect
PostQuitMessage
PostMessageA
PeekMessageA
OpenClipboard
OffsetRect
OemToCharA
MsgWaitForMultipleObjects
MessageBoxA
MessageBeep
MapWindowPoints
MapVirtualKeyA
LoadStringA
LoadKeyboardLayoutA
LoadIconA
LoadCursorA
LoadBitmapA
KillTimer
IsZoomed
IsWindowVisible
IsWindowEnabled
IsWindow
IsRectEmpty
IsIconic
IsDialogMessageA
IsChild
InvalidateRect
IntersectRect
InsertMenuItemA
InsertMenuA
InflateRect
GetWindowThreadProcessId
GetWindowTextA
GetWindowRect
GetWindowPlacement
GetWindowLongA
GetWindowDC
GetTopWindow
GetSystemMetrics
GetSystemMenu
GetSysColorBrush
GetSysColor
GetSubMenu
GetScrollRange
GetScrollPos
GetScrollInfo
GetPropA
GetParent
GetWindow
GetMenuStringA
GetMenuState
GetMenuItemInfoA
GetMenuItemID
GetMenuItemCount
GetMenu
GetLastActivePopup
GetKeyboardState
GetKeyboardLayoutList
GetKeyboardLayout
GetKeyState
GetKeyNameTextA
GetIconInfo
GetForegroundWindow
GetFocus
GetDesktopWindow
GetDCEx
GetDC
GetCursorPos
GetCursor
GetClipboardData
GetClientRect
GetClassNameA
GetClassInfoA
GetCapture
GetActiveWindow
FrameRect
FindWindowA
FillRect
ExitWindowsEx
EqualRect
EnumWindows
EnumThreadWindows
EndPaint
EnableWindow
EnableScrollBar
EnableMenuItem
EmptyClipboard
DrawTextA
DrawMenuBar
DrawIconEx
DrawIcon
DrawFrameControl
DrawEdge
DispatchMessageA
DestroyWindow
DestroyMenu
DestroyCursor
DestroyCursor
DeleteMenu
DefWindowProcA
DefMDIChildProcA
DefFrameProcA
CreatePopupMenu
CreateMenu
CreateIcon
CloseClipboard
ClientToScreen
CheckMenuItem
CallWindowProcA
CallNextHookEx
BeginPaint
CharNextA
CharLowerBuffA
CharLowerA
CharUpperBuffA
CharToOemA
AdjustWindowRectEx
ActivateKeyboardLayout
advapi32
RegQueryValueExA
RegOpenKeyExA
RegCloseKey
RegSetValueExA
RegQueryValueExA
RegOpenKeyExA
RegFlushKey
RegCreateKeyExA
RegCloseKey
SetSecurityInfo
SetEntriesInAclA
GetSecurityInfo
oleaut32
SysFreeString
SysReAllocStringLen
SysAllocStringLen
SafeArrayPtrOfIndex
SafeArrayGetUBound
SafeArrayGetLBound
SafeArrayCreate
VariantChangeType
VariantCopy
VariantClear
VariantInit
GetErrorInfo
SysFreeString
version
VerQueryValueA
GetFileVersionInfoSizeA
GetFileVersionInfoA
gdi32
UnrealizeObject
StretchBlt
SetWindowOrgEx
SetWinMetaFileBits
SetViewportOrgEx
SetTextColor
SetStretchBltMode
SetROP2
SetPixel
SetEnhMetaFileBits
SetDIBColorTable
SetBrushOrgEx
SetBkMode
SetBkColor
SelectPalette
SelectObject
SaveDC
RestoreDC
Rectangle
RectVisible
RealizePalette
PlayEnhMetaFile
PatBlt
MoveToEx
MaskBlt
LineTo
IntersectClipRect
GetWindowOrgEx
GetWinMetaFileBits
GetTextMetricsA
GetTextExtentPointA
GetTextExtentPoint32A
GetSystemPaletteEntries
GetStockObject
GetPixel
GetPaletteEntries
GetObjectA
GetEnhMetaFilePaletteEntries
GetEnhMetaFileHeader
GetEnhMetaFileBits
GetDeviceCaps
GetDIBits
GetDIBColorTable
GetDCOrgEx
GetCurrentPositionEx
GetClipBox
GetBrushOrgEx
GetBitmapBits
ExcludeClipRect
DeleteObject
DeleteEnhMetaFile
DeleteDC
CreateSolidBrush
CreatePenIndirect
CreatePalette
CreateHalftonePalette
CreateFontIndirectA
CreateDIBitmap
CreateDIBSection
CreateCompatibleDC
CreateCompatibleBitmap
CreateBrushIndirect
CreateBitmap
CopyEnhMetaFileA
BitBlt
ole32
OleUninitialize
OleInitialize
CoCreateInstance
CoUninitialize
CoInitialize
comctl32
ImageList_SetIconSize
ImageList_GetIconSize
ImageList_Write
ImageList_Read
ImageList_GetDragImage
ImageList_DragShowNolock
ImageList_SetDragCursorImage
ImageList_DragMove
ImageList_DragLeave
ImageList_DragEnter
ImageList_EndDrag
ImageList_BeginDrag
ImageList_Remove
ImageList_DrawEx
ImageList_Draw
ImageList_GetBkColor
ImageList_SetBkColor
ImageList_ReplaceIcon
ImageList_Add
ImageList_GetImageCount
ImageList_Destroy
ImageList_Create
shell32
SHGetSpecialFolderLocation
SHGetPathFromIDListA
Sections
CODE Size: 368KB - Virtual size: 368KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
DATA Size: 5KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
BSS Size: - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 9KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.tls Size: - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 512B - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.reloc Size: - Virtual size: 28KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 28KB - Virtual size: 32KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.aspack Size: 12KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.adata Size: - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.SCY Size: 9KB - Virtual size: 12KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE