2024-02-20_b6dfed7dd6b694b18516b4e4b645b756_ryuk

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General

Target

2024-02-20_b6dfed7dd6b694b18516b4e4b645b756_ryuk
Size

4.0MB
MD5

b6dfed7dd6b694b18516b4e4b645b756
SHA1

efb3a29e8f41916ada0b7860bc22be6ddf1b2026
SHA256

eed1b0453ec30264dc85ef2cb26c07b89ce808b2b1614a0461f633dc456a4bf7
SHA512

b7bafbcfe0ebf16db99dafac45f3b8510d038cf6aca07459808cd0369c1bea6ef8432d5cf7e1e43963cffa1fa45b1459e9ad9b320524661a2ecb6314b69b2578
SSDEEP

12288:sp4pNfz3ymJnJ8QCFkxCaQTOlPes5Z76k/L:eEtl9mRda12sX7

Score

10^/10

Malware Config

Signatures

Detects executables packed with ASPack 1 IoCs

resource	yara_rule
sample	INDICATOR_EXE_Packed_ASPack

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
2024-02-20_b6dfed7dd6b694b18516b4e4b645b756_ryuk

Files

2024-02-20_b6dfed7dd6b694b18516b4e4b645b756_ryuk
.exe windows:4 windows x86 arch: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

Sharing

General

Malware Config

Signatures

Files

12fcd3183e0fb67f1e38925ed5c0c47c

Headers

File Characteristics

Imports

kernel32

user32

advapi32

oleaut32

version

gdi32

ole32

comctl32

shell32

Sections

CODE Size: 368KB - Virtual size: 368KB

DATA Size: 5KB - Virtual size: 8KB

BSS Size: - Virtual size: 4KB

.idata Size: 9KB - Virtual size: 12KB

.tls Size: - Virtual size: 4KB

.rdata Size: 512B - Virtual size: 4KB

.reloc Size: - Virtual size: 28KB

.rsrc Size: 28KB - Virtual size: 32KB

.aspack Size: 12KB - Virtual size: 12KB

.adata Size: - Virtual size: 4KB

.SCY Size: 9KB - Virtual size: 12KB

CODE
Size: 368KB - Virtual size: 368KB

DATA
Size: 5KB - Virtual size: 8KB

BSS
Size: - Virtual size: 4KB

.idata
Size: 9KB - Virtual size: 12KB

.tls
Size: - Virtual size: 4KB

.rdata
Size: 512B - Virtual size: 4KB

.reloc
Size: - Virtual size: 28KB

.rsrc
Size: 28KB - Virtual size: 32KB

.aspack
Size: 12KB - Virtual size: 12KB

.adata
Size: - Virtual size: 4KB

.SCY
Size: 9KB - Virtual size: 12KB