Windows-Critical-KB6215903-x64[.]exe

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General

Target

Windows-Critical-KB6215903-x64.exe
Size

6.7MB
MD5

52df72ca5cb65aa512e78cba28875405
SHA1

a7bd5de6fcdbc207fb22f916f11e7047ac573edd
SHA256

ea551b15a4c7340e88d9f069e5d7bdff97ac64bc2ba2b9e5bb7cabc38848d7d7
SHA512

5829d877b1490a6e9f3615e8f2f16fb6801b944ea865d91aad40dbe77d509415d6399d885f176e0baa701dd617091f22696eff5d51400f8a2f2afb3cca3ea611
SSDEEP

49152:nwUJewPxCrMlyV5dIlrcqtLYh7GbxzIklR/Hymibmhc9KqtpOlHJ7SwoLbPhMKqn:nw2gCLYhuk1qn

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
Windows-Critical-KB6215903-x64.exe

Files

Windows-Critical-KB6215903-x64.exe
.exe windows x64

99009bb67b394ce094daedbe83774db8

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED

Imports

wintrust

WinVerifyTrust

advapi32

GetSidIdentifierAuthority
GetSidSubAuthority
GetSidSubAuthorityCount
GetTokenInformation
OpenProcessToken
RegCloseKey
RegConnectRegistryW
RegCreateKeyExW
RegDeleteKeyExW
RegDeleteKeyW
RegDeleteValueW
RegEnumKeyExW
RegEnumValueW
RegFlushKey
RegLoadKeyW
RegOpenKeyExW
RegQueryInfoKeyW
RegQueryValueExW
RegReplaceKeyW
RegRestoreKeyW
RegSaveKeyW
RegSetValueExW
RegUnLoadKeyW

kernel32

AddVectoredExceptionHandler
CloseHandle
CompareStringA
CompareStringW
CreateDirectoryA
CreateEventW
CreateFileA
CreateFileW
CreateMutexA
CreateProcessA
CreateSemaphoreA
CreateThread
DeleteCriticalSection
DeleteFileA
DuplicateHandle
EnterCriticalSection
EnumCalendarInfoW
EnumResourceNamesW
EnumSystemLocalesW
ExitProcess
ExitThread
FileTimeToSystemTime
FindClose
FindFirstFileW
FindResourceA
FindResourceW
FormatMessageW
FreeEnvironmentStringsA
FreeEnvironmentStringsW
FreeLibrary
FreeResource
GetACP
GetCPInfo
GetCPInfoExW
GetCommandLineW
GetCurrentProcess
GetCurrentProcessId
GetCurrentThread
GetCurrentThreadId
GetDateFormatW
GetDiskFreeSpaceW
GetEnvironmentStrings
GetEnvironmentStringsW
GetExitCodeThread
GetFileAttributesA
GetFileAttributesW
GetFileSize
GetFileType
GetFullPathNameW
GetLastError
GetLocalTime
GetLocaleInfoA
GetLocaleInfoW
GetModuleFileNameA
GetModuleFileNameW
GetModuleHandleA
GetModuleHandleW
GetOEMCP
GetProcAddress
GetProcessHeap
GetStartupInfoA
GetStartupInfoW
GetStdHandle
GetStringTypeA
GetStringTypeW
GetSystemDefaultLangID
GetSystemDefaultUILanguage
GetSystemInfo
GetSystemTimeAsFileTime
GetThreadContext
GetThreadLocale
GetThreadPriority
GetTickCount
GetTimeZoneInformation
GetUserDefaultLCID
GetUserDefaultUILanguage
GetVersion
GetVersionExA
GetVersionExW
GlobalAddAtomW
GlobalAlloc
GlobalDeleteAtom
GlobalFindAtomW
GlobalFree
GlobalLock
GlobalUnlock
HeapAlloc
HeapCreate
HeapDestroy
HeapFree
InitializeCriticalSection
IsDBCSLeadByteEx
IsDebuggerPresent
IsValidLocale
LCMapStringA
LCMapStringW
LeaveCriticalSection
LoadLibraryA
LoadLibraryExW
LoadLibraryW
LoadResource
LocalAlloc
LocalFileTimeToFileTime
LocalFree
LockResource
MulDiv
MultiByteToWideChar
QueryPerformanceCounter
QueryPerformanceFrequency
RaiseException
ReadFile
ReleaseMutex
ReleaseSemaphore
RemoveDirectoryA
RemoveVectoredExceptionHandler
ResetEvent
ResumeThread
RtlCaptureContext
RtlUnwind
SetConsoleCtrlHandler
SetEndOfFile
SetErrorMode
SetEvent
SetFilePointer
SetFileTime
SetHandleCount
SetLastError
SetThreadContext
SetThreadLocale
SetThreadPriority
SizeofResource
Sleep
SuspendThread
SwitchToThread
SystemTimeToFileTime
TerminateThread
TlsAlloc
TlsFree
TlsGetValue
TlsSetValue
TryEnterCriticalSection
UnhandledExceptionFilter
VerSetConditionMask
VerifyVersionInfoW
VirtualAlloc
VirtualAllocEx
VirtualFree
VirtualQuery
VirtualQueryEx
WaitForMultipleObjectsEx
WaitForSingleObject
WaitForSingleObjectEx
WideCharToMultiByte
WriteFile
WriteProcessMemory
lstrcmpW
lstrlenW
RtlRestoreContext
RtlUnwindEx

version

GetFileVersionInfoSizeW
GetFileVersionInfoW
VerQueryValueW

winspool.drv

ClosePrinter
DocumentPropertiesW
EnumPrintersW
GetDefaultPrinterW
OpenPrinterW

comctl32

FlatSB_GetScrollInfo
FlatSB_GetScrollPos
FlatSB_SetScrollInfo
FlatSB_SetScrollPos
FlatSB_SetScrollProp
ImageList_Add
ImageList_BeginDrag
ImageList_Copy
ImageList_Create
ImageList_Destroy
ImageList_DragEnter
ImageList_DragLeave
ImageList_DragMove
ImageList_DragShowNolock
ImageList_Draw
ImageList_DrawEx
ImageList_DrawIndirect
ImageList_EndDrag
ImageList_GetBkColor
ImageList_GetDragImage
ImageList_GetIcon
ImageList_GetIconSize
ImageList_GetImageCount
ImageList_GetImageInfo
ImageList_LoadImageW
ImageList_Read
ImageList_Remove
ImageList_Replace
ImageList_ReplaceIcon
ImageList_SetBkColor
ImageList_SetIconSize
ImageList_SetImageCount
ImageList_SetOverlayImage
ImageList_Write
InitCommonControls
InitializeFlatSB
_TrackMouseEvent

comdlg32

FindTextW

gdi32

AbortDoc
AngleArc
Arc
ArcTo
BitBlt
Chord
CombineRgn
CopyEnhMetaFileW
CreateBitmap
CreateBrushIndirect
CreateCompatibleBitmap
CreateCompatibleDC
CreateDCW
CreateDIBSection
CreateDIBitmap
CreateFontIndirectW
CreateHalftonePalette
CreateICW
CreatePalette
CreatePenIndirect
CreateRectRgn
CreateSolidBrush
DeleteDC
DeleteEnhMetaFile
DeleteObject
Ellipse
EndDoc
EndPage
EnumFontFamiliesExW
EnumFontsW
ExcludeClipRect
ExtFloodFill
ExtTextOutW
FrameRgn
GdiFlush
GetBitmapBits
GetBrushOrgEx
GetClipBox
GetCurrentPositionEx
GetDIBColorTable
GetDIBits
GetDeviceCaps
GetEnhMetaFileBits
GetEnhMetaFileDescriptionW
GetEnhMetaFileHeader
GetEnhMetaFilePaletteEntries
GetObjectW
GetPaletteEntries
GetPixel
GetRgnBox
GetStockObject
GetStretchBltMode
GetSystemPaletteEntries
GetTextExtentPoint32W
GetTextExtentPointW
GetTextMetricsW
GetWinMetaFileBits
GetWindowOrgEx
IntersectClipRect
LineTo
MaskBlt
MoveToEx
PatBlt
Pie
PlayEnhMetaFile
PolyBezier
PolyBezierTo
Polygon
Polyline
RealizePalette
RectVisible
Rectangle
RestoreDC
RoundRect
SaveDC
SelectClipRgn
SelectObject
SelectPalette
SetAbortProc
SetBkColor
SetBkMode
SetBrushOrgEx
SetDIBColorTable
SetDIBits
SetEnhMetaFileBits
SetMapMode
SetPixel
SetROP2
SetRectRgn
SetStretchBltMode
SetTextColor
SetViewportOrgEx
SetWinMetaFileBits
SetWindowOrgEx
StartDocW
StartPage
StretchBlt
StretchDIBits
UnrealizeObject

shell32

SHAppBarMessage
Shell_NotifyIconW

user32

ActivateKeyboardLayout
AdjustWindowRectEx
BeginPaint
BringWindowToTop
CallNextHookEx
CallWindowProcW
CharLowerBuffA
CharLowerBuffW
CharLowerW
CharNextW
CharUpperBuffA
CharUpperBuffW
CharUpperW
CheckMenuItem
ChildWindowFromPoint
ClientToScreen
CloseClipboard
CopyIcon
CopyImage
CreateAcceleratorTableW
CreateIcon
CreateIconIndirect
CreateMenu
CreatePopupMenu
CreateWindowExW
DefFrameProcW
DefMDIChildProcW
DefWindowProcW
DeleteMenu
DestroyCursor
DestroyIcon
DestroyMenu
DestroyWindow
DispatchMessageA
DispatchMessageW
DrawEdge
DrawFocusRect
DrawFrameControl
DrawIcon
DrawIconEx
DrawMenuBar
DrawTextExW
DrawTextW
EmptyClipboard
EnableMenuItem
EnableScrollBar
EnableWindow
EndMenu
EndPaint
EnumChildWindows
EnumDisplayMonitors
EnumThreadWindows
EnumWindows
FillRect
FindWindowExW
FindWindowW
FrameRect
GetActiveWindow
GetCapture
GetClassInfoW
GetClassNameW
GetClientRect
GetClipboardData
GetCursor
GetCursorPos
GetDC
GetDCEx
GetDesktopWindow
GetDlgCtrlID
GetFocus
GetForegroundWindow
GetIconInfo
GetKeyNameTextW
GetKeyState
GetKeyboardLayout
GetKeyboardLayoutList
GetKeyboardLayoutNameW
GetKeyboardState
GetLastActivePopup
GetMenu
GetMenuItemCount
GetMenuItemID
GetMenuItemInfoW
GetMenuState
GetMenuStringW
GetMessageExtraInfo
GetMessagePos
GetMonitorInfoW
GetParent
GetPropW
GetScrollBarInfo
GetScrollInfo
GetScrollPos
GetScrollRange
GetSubMenu
GetSysColor
GetSysColorBrush
GetSystemMenu
GetSystemMetrics
GetTopWindow
GetUpdateRect
GetWindow
GetWindowDC
GetWindowPlacement
GetWindowRect
GetWindowTextW
GetWindowThreadProcessId
HideCaret
InsertMenuItemW
InsertMenuW
InvalidateRect
IsChild
IsDialogMessageA
IsDialogMessageW
IsIconic
IsWindow
IsWindowEnabled
IsWindowUnicode
IsWindowVisible
IsZoomed
KillTimer
LoadBitmapW
LoadCursorW
LoadIconW
LoadKeyboardLayoutW
LoadStringW
LockWindowUpdate
MapVirtualKeyW
MapWindowPoints
MessageBeep
MessageBoxW
MonitorFromPoint
MonitorFromRect
MonitorFromWindow
MoveWindow
MsgWaitForMultipleObjects
MsgWaitForMultipleObjectsEx
OpenClipboard
PeekMessageA
PeekMessageW
PostMessageW
PostQuitMessage
RedrawWindow
RegisterClassW
RegisterClipboardFormatW
RegisterDeviceNotificationW
RegisterWindowMessageW
ReleaseCapture
ReleaseDC
RemoveMenu
RemovePropW
ScreenToClient
ScrollWindow
SendMessageA
SendMessageW
SetActiveWindow
SetCapture
SetClipboardData
SetCursor
SetCursorPos
SetFocus
SetForegroundWindow
SetMenu
SetMenuItemInfoW
SetParent
SetPropW
SetRect
SetScrollInfo
SetScrollPos
SetScrollRange
SetTimer
SetWindowPlacement
SetWindowPos
SetWindowRgn
SetWindowTextW
SetWindowsHookExW
ShowCaret
ShowOwnedPopups
ShowScrollBar
ShowWindow
SystemParametersInfoW
TrackPopupMenu
TranslateMDISysAccel
TranslateMessage
UnhookWindowsHookEx
UnregisterClassW
UnregisterDeviceNotification
UpdateWindow
ValidateRect
WaitMessage
WindowFromPoint
GetClassLongPtrW
GetWindowLongPtrW
SetClassLongPtrW
SetWindowLongPtrW
wsprintfA

ole32

CoCreateInstance
CoInitialize
CoTaskMemAlloc
CoTaskMemFree
CoUninitialize
IsEqualGUID
OleInitialize
OleUninitialize

oleaut32

GetErrorInfo
SafeArrayCreate
SafeArrayGetLBound
SafeArrayGetUBound
SafeArrayPtrOfIndex
SysAllocStringLen
SysFreeString
SysReAllocStringLen
VariantChangeType
VariantClear
VariantCopy
VariantInit

crypt32

CryptStringToBinaryA
CryptStringToBinaryW

ws2_32

WSACleanup
WSAGetLastError
WSALookupServiceBeginW
WSALookupServiceEnd
WSALookupServiceNextW
WSASetServiceW
WSAStartup
__WSAFDIsSet
accept
bind
closesocket
connect
getsockname
listen
recv
select
send
setsockopt
socket

winhttp

WinHttpAddRequestHeaders
WinHttpCloseHandle
WinHttpConnect
WinHttpGetIEProxyConfigForCurrentUser
WinHttpGetProxyForUrl
WinHttpOpen
WinHttpOpenRequest
WinHttpQueryAuthSchemes
WinHttpQueryDataAvailable
WinHttpQueryHeaders
WinHttpQueryOption
WinHttpReadData
WinHttpReceiveResponse
WinHttpSendRequest
WinHttpSetCredentials
WinHttpSetOption
WinHttpSetStatusCallback
WinHttpSetTimeouts
WinHttpWriteData

Exports

Exports

Form2
_ZTR6TForm2
__CPPdebugHook
__setRaiseListFuncAddr

Sections

.text
Size: 3.2MB - Virtual size: 3.2MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rodata
Size: 2.1MB - Virtual size: 2.1MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.data
Size: 130KB - Virtual size: 335KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 2KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 318KB - Virtual size: 318KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.xdata
Size: 560KB - Virtual size: 559KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rdata
Size: 512B - Virtual size: 40B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.idata
Size: 21KB - Virtual size: 20KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.didata
Size: 7KB - Virtual size: 6KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.edata
Size: 512B - Virtual size: 148B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 165KB - Virtual size: 165KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 244KB - Virtual size: 244KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

99009bb67b394ce094daedbe83774db8

Headers

DLL Characteristics

File Characteristics

Imports

wintrust

advapi32

kernel32

version

winspool.drv

comctl32

comdlg32

gdi32

shell32

user32

ole32

oleaut32

crypt32

ws2_32

winhttp

Exports

Exports

Sections

.text Size: 3.2MB - Virtual size: 3.2MB

.rodata Size: 2.1MB - Virtual size: 2.1MB

.data Size: 130KB - Virtual size: 335KB

.tls Size: 2KB - Virtual size: 2KB

.pdata Size: 318KB - Virtual size: 318KB

.xdata Size: 560KB - Virtual size: 559KB

.rdata Size: 512B - Virtual size: 40B

.idata Size: 21KB - Virtual size: 20KB

.didata Size: 7KB - Virtual size: 6KB

.edata Size: 512B - Virtual size: 148B

.rsrc Size: 165KB - Virtual size: 165KB

.reloc Size: 244KB - Virtual size: 244KB

.text
Size: 3.2MB - Virtual size: 3.2MB

.rodata
Size: 2.1MB - Virtual size: 2.1MB

.data
Size: 130KB - Virtual size: 335KB

.tls
Size: 2KB - Virtual size: 2KB

.pdata
Size: 318KB - Virtual size: 318KB

.xdata
Size: 560KB - Virtual size: 559KB

.rdata
Size: 512B - Virtual size: 40B

.idata
Size: 21KB - Virtual size: 20KB

.didata
Size: 7KB - Virtual size: 6KB

.edata
Size: 512B - Virtual size: 148B

.rsrc
Size: 165KB - Virtual size: 165KB

.reloc
Size: 244KB - Virtual size: 244KB