winlogon[.]exe

Sharing

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General

Target

winlogon.exe
Size

4.5MB
MD5

d3bd0d22e79a84a1e62f853785118f6f
SHA1

c93a512ced053ecadd20447b0f6a3e8a1814f5e8
SHA256

b928cbf05e72abd110fa76fd1e790b60832b812d85524255ce8b77efe6179ac9
SHA512

c9714c02e8801fc312ad5e90dc7c5f99153cfbc60fc83643be8d5b22170e3866f8087234e26a925a89b1b059baa2dab73fc2d42021e4c059820c892704b98d8c
SSDEEP

98304:E13rzVNItbr4J72DjEDzbK76UqzZJda8TSgd1+H7EtQnP:ElzVN4b0Ji0s6Uq/egdMHt

Score

3^/10

Malware Config

Signatures

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
winlogon.exe

Files

winlogon.exe
.exe windows:5 windows x64 arch:x64

a3135969e0ac42572dbad2573a143bf3

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE

Imports

wsock32

WSACleanup
socket
inet_ntoa
setsockopt
ntohs
recvfrom
ioctlsocket
htons
WSAStartup
__WSAFDIsSet
select
accept
listen
bind
closesocket
WSAGetLastError
recv
sendto
send
inet_addr
gethostbyname
gethostname
connect

version

GetFileVersionInfoW
GetFileVersionInfoSizeW
VerQueryValueW

winmm

timeGetTime
waveOutSetVolume
mciSendStringW

comctl32

ImageList_ReplaceIcon
ImageList_Destroy
ImageList_Remove
ImageList_SetDragCursorImage
ImageList_BeginDrag
ImageList_DragEnter
ImageList_DragLeave
ImageList_EndDrag
ImageList_DragMove
InitCommonControlsEx
ImageList_Create

mpr

WNetUseConnectionW
WNetCancelConnection2W
WNetGetConnectionW
WNetAddConnection2W

wininet

InternetQueryDataAvailable
InternetCloseHandle
InternetOpenW
InternetSetOptionW
InternetCrackUrlW
HttpQueryInfoW
InternetQueryOptionW
HttpOpenRequestW
HttpSendRequestW
FtpOpenFileW
FtpGetFileSize
InternetOpenUrlW
InternetReadFile
InternetConnectW

psapi

GetProcessMemoryInfo

iphlpapi

IcmpCreateFile
IcmpCloseHandle
IcmpSendEcho

userenv

DestroyEnvironmentBlock
UnloadUserProfile
CreateEnvironmentBlock
LoadUserProfileW

uxtheme

IsThemeActive

kernel32

WaitForSingleObject
HeapAlloc
GetProcessHeap
HeapFree
Sleep
GetCurrentThreadId
MultiByteToWideChar
MulDiv
GetVersionExW
IsWow64Process
GetSystemInfo
FreeLibrary
LoadLibraryA
GetProcAddress
SetErrorMode
GetModuleFileNameW
WideCharToMultiByte
lstrcpyW
lstrlenW
GetModuleHandleW
QueryPerformanceCounter
VirtualFreeEx
OpenProcess
VirtualAllocEx
WriteProcessMemory
ReadProcessMemory
CreateFileW
SetFilePointerEx
SetEndOfFile
ReadFile
WriteFile
FlushFileBuffers
TerminateProcess
CreateToolhelp32Snapshot
Process32FirstW
Process32NextW
SetFileTime
GetFileAttributesW
FindFirstFileW
FindClose
GetLongPathNameW
GetShortPathNameW
CloseHandle
FindNextFileW
CopyFileExW
MoveFileW
CreateDirectoryW
RemoveDirectoryW
SetSystemPowerState
QueryPerformanceFrequency
FindResourceW
LoadResource
LockResource
SizeofResource
EnumResourceNamesW
OutputDebugStringW
GetTempPathW
GetTempFileNameW
DeviceIoControl
GetLocalTime
CompareStringW
CreateThread
LeaveCriticalSection
GetStdHandle
CreatePipe
TerminateThread
LoadLibraryExW
FindResourceExW
CopyFileW
VirtualFree
FormatMessageW
GetExitCodeProcess
GetPrivateProfileStringW
WritePrivateProfileStringW
GetPrivateProfileSectionW
WritePrivateProfileSectionW
GetPrivateProfileSectionNamesW
FileTimeToLocalFileTime
FileTimeToSystemTime
SystemTimeToFileTime
LocalFileTimeToFileTime
GetDriveTypeW
GetDiskFreeSpaceExW
GetDiskFreeSpaceW
GetVolumeInformationW
SetVolumeLabelW
CreateHardLinkW
SetFileAttributesW
CreateEventW
SetEvent
GetEnvironmentVariableW
SetEnvironmentVariableW
GlobalLock
GlobalUnlock
GlobalAlloc
GetFileSize
GlobalFree
GlobalMemoryStatusEx
Beep
GetSystemDirectoryW
HeapReAlloc
HeapSize
GetComputerNameW
GetWindowsDirectoryW
GetCurrentProcessId
GetProcessIoCounters
CreateProcessW
GetProcessId
SetPriorityClass
LoadLibraryW
VirtualAlloc
GetFullPathNameW
SetCurrentDirectoryW
IsDebuggerPresent
GetCurrentDirectoryW
lstrcmpiW
DecodePointer
GetLastError
RaiseException
InitializeCriticalSectionAndSpinCount
DeleteCriticalSection
EncodePointer
DuplicateHandle
GetCurrentProcess
EnterCriticalSection
GetCurrentThread
ExitProcess
GetModuleHandleExW
ExitThread
GetSystemTimeAsFileTime
ResumeThread
GetCommandLineW
IsProcessorFeaturePresent
RtlPcToFileHeader
RtlUnwindEx
IsValidCodePage
GetACP
GetOEMCP
GetCPInfo
SetLastError
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
GetStartupInfoW
GetStringTypeW
SetStdHandle
GetFileType
GetConsoleCP
GetConsoleMode
ReadConsoleW
GetTimeZoneInformation
GetDateFormatW
GetTimeFormatW
LCMapStringW
GetEnvironmentStringsW
FreeEnvironmentStringsW
WriteConsoleW
DeleteFileW
SetEnvironmentVariableA
GetSystemTimeAsFileTime
GetModuleHandleA
CreateEventA
GetModuleFileNameW
LoadLibraryA
TerminateProcess
GetCurrentProcess
CreateToolhelp32Snapshot
Thread32First
GetCurrentProcessId
GetCurrentThreadId
OpenThread
Thread32Next
CloseHandle
SuspendThread
ResumeThread
WriteProcessMemory
GetSystemInfo
VirtualAlloc
VirtualProtect
VirtualFree
GetProcessAffinityMask
SetProcessAffinityMask
GetCurrentThread
SetThreadAffinityMask
Sleep
FreeLibrary
GetTickCount
SystemTimeToFileTime
FileTimeToSystemTime
GlobalFree
LocalAlloc
LocalFree
GetProcAddress
ExitProcess
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSection
DeleteCriticalSection
GetModuleHandleW
LoadResource
MultiByteToWideChar
FindResourceExW
FindResourceExA
WideCharToMultiByte
GetThreadLocale
GetUserDefaultLCID
GetSystemDefaultLCID
EnumResourceNamesA
EnumResourceNamesW
EnumResourceLanguagesA
EnumResourceLanguagesW
EnumResourceTypesA
EnumResourceTypesW
CreateFileW
LoadLibraryW
GetLastError
FlushFileBuffers
CreateFileA
WriteConsoleW
GetConsoleOutputCP
WriteConsoleA
SetStdHandle
FlsSetValue
GetCommandLineA
RaiseException
RtlPcToFileHeader
RtlLookupFunctionEntry
RtlUnwindEx
HeapFree
GetCPInfo
GetACP
GetOEMCP
IsValidCodePage
EncodePointer
DecodePointer
FlsGetValue
FlsFree
SetLastError
FlsAlloc
UnhandledExceptionFilter
SetUnhandledExceptionFilter
IsDebuggerPresent
RtlVirtualUnwind
RtlCaptureContext
HeapAlloc
LCMapStringA
LCMapStringW
SetHandleCount
GetStdHandle
GetFileType
GetStartupInfoA
GetModuleFileNameA
FreeEnvironmentStringsA
GetEnvironmentStrings
FreeEnvironmentStringsW
GetEnvironmentStringsW
HeapSetInformation
HeapCreate
HeapDestroy
QueryPerformanceCounter
GetStringTypeA
GetStringTypeW
GetLocaleInfoA
HeapSize
WriteFile
SetFilePointer
GetConsoleCP
GetConsoleMode
HeapReAlloc
InitializeCriticalSectionAndSpinCount
LocalAlloc
LocalFree
GetModuleFileNameW
GetProcessAffinityMask
SetProcessAffinityMask
SetThreadAffinityMask
Sleep
ExitProcess
FreeLibrary
LoadLibraryA
GetModuleHandleA
GetProcAddress

user32

RegisterHotKey
ClientToScreen
GetKeyboardLayoutNameW
IsCharAlphaW
IsCharAlphaNumericW
IsCharLowerW
IsCharUpperW
GetMenuStringW
GetSubMenu
GetCaretPos
IsZoomed
GetWindowLongW
MonitorFromPoint
GetMonitorInfoW
SetWindowLongW
SetLayeredWindowAttributes
FlashWindow
GetClassLongPtrW
TranslateAcceleratorW
IsDialogMessageW
GetSysColor
InflateRect
DrawFocusRect
DrawTextW
FrameRect
DrawFrameControl
FillRect
PtInRect
DestroyAcceleratorTable
CreateAcceleratorTableW
SetCursor
GetWindowDC
GetSystemMetrics
SetWindowLongPtrW
GetActiveWindow
CharNextW
wsprintfW
RedrawWindow
DrawMenuBar
DestroyMenu
SetMenu
GetWindowTextLengthW
CreateMenu
IsDlgButtonChecked
DefDlgProcW
CallWindowProcW
ReleaseCapture
SetCapture
UnregisterHotKey
CharLowerBuffW
MonitorFromRect
LoadImageW
CreateIconFromResourceEx
mouse_event
ExitWindowsEx
SetActiveWindow
FindWindowExW
EnumThreadWindows
SetMenuDefaultItem
InsertMenuItemW
IsMenu
GetCursorInfo
GetCursorPos
DeleteMenu
CheckMenuRadioItem
GetMenuItemID
GetMenuItemCount
SetMenuItemInfoW
GetMenuItemInfoW
SetForegroundWindow
IsIconic
TranslateMessage
SystemParametersInfoW
keybd_event
SendInput
GetAsyncKeyState
SetKeyboardState
GetKeyboardState
GetKeyState
VkKeyScanW
LoadStringW
DialogBoxParamW
MessageBeep
EndDialog
SendDlgItemMessageW
GetDlgItem
SetWindowTextW
CopyRect
ReleaseDC
GetDC
EndPaint
BeginPaint
GetClientRect
GetMenu
DestroyWindow
EnumWindows
GetDesktopWindow
IsWindow
IsWindowEnabled
IsWindowVisible
EnableWindow
InvalidateRect
GetWindowLongPtrW
GetWindowThreadProcessId
AttachThreadInput
GetFocus
GetWindowTextW
SendMessageTimeoutW
EnumChildWindows
CharUpperBuffW
GetClassNameW
GetParent
GetDlgCtrlID
SendMessageW
MapVirtualKeyW
PostMessageW
GetWindowRect
SetUserObjectSecurity
CloseDesktop
CloseWindowStation
OpenDesktopW
SetProcessWindowStation
GetProcessWindowStation
SetWindowPos
CopyImage
AdjustWindowRectEx
SetRect
SetClipboardData
EmptyClipboard
CountClipboardFormats
CloseClipboard
GetClipboardData
IsClipboardFormatAvailable
OpenClipboard
BlockInput
GetMessageW
LockWindowUpdate
TrackPopupMenuEx
DispatchMessageW
OpenWindowStationW
GetUserObjectSecurity
MessageBoxW
DefWindowProcW
MoveWindow
SetFocus
PostQuitMessage
KillTimer
CreatePopupMenu
RegisterWindowMessageW
SetTimer
ShowWindow
CreateWindowExW
RegisterClassExW
LoadIconW
LoadCursorW
GetSysColorBrush
GetForegroundWindow
MessageBoxA
DestroyIcon
FindWindowW
PeekMessageW
ScreenToClient
GetUserObjectInformationW
CharUpperBuffW
MessageBoxW
GetProcessWindowStation
GetProcessWindowStation
GetUserObjectInformationW

gdi32

StrokePath
DeleteObject
GetTextExtentPoint32W
ExtCreatePen
GetDeviceCaps
EndPath
SetPixel
CloseFigure
LineTo
AngleArc
MoveToEx
CreateCompatibleBitmap
CreateCompatibleDC
Ellipse
PolyDraw
BeginPath
Rectangle
SetViewportOrgEx
SelectObject
StretchBlt
GetDIBits
DeleteDC
GetPixel
CreateDCW
GetObjectW
SetBkMode
RoundRect
SetBkColor
CreatePen
CreateSolidBrush
SetTextColor
CreateFontW
GetTextFaceW
GetStockObject
StrokeAndFillPath

comdlg32

GetOpenFileNameW
GetSaveFileNameW

advapi32

GetAce
RegEnumValueW
RegDeleteValueW
RegDeleteKeyW
RegEnumKeyExW
RegSetValueExW
RegOpenKeyExW
RegCloseKey
RegQueryValueExW
RegConnectRegistryW
InitializeSecurityDescriptor
InitializeAcl
AdjustTokenPrivileges
OpenThreadToken
OpenProcessToken
LookupPrivilegeValueW
DuplicateTokenEx
CreateProcessAsUserW
CreateProcessWithLogonW
GetLengthSid
CopySid
LogonUserW
AllocateAndInitializeSid
CheckTokenMembership
RegCreateKeyExW
FreeSid
GetTokenInformation
GetSecurityDescriptorDacl
GetAclInformation
AddAce
SetSecurityDescriptorDacl
GetUserNameW
InitiateSystemShutdownExW

shell32

DragQueryPoint
ShellExecuteExW
DragQueryFileW
SHEmptyRecycleBinW
SHGetPathFromIDListW
SHBrowseForFolderW
SHCreateShellItem
SHGetDesktopFolder
SHGetSpecialFolderLocation
SHGetFolderPathW
SHFileOperationW
ExtractIconExW
Shell_NotifyIconW
ShellExecuteW
DragFinish

ole32

CoTaskMemAlloc
CoTaskMemFree
CLSIDFromString
ProgIDFromCLSID
CLSIDFromProgID
OleSetMenuDescriptor
MkParseDisplayName
OleSetContainedObject
CoCreateInstance
IIDFromString
StringFromGUID2
CreateStreamOnHGlobal
OleInitialize
OleUninitialize
CoInitialize
CoUninitialize
GetRunningObjectTable
CoGetInstanceFromFile
CoGetObject
CoInitializeSecurity
CoCreateInstanceEx
CoSetProxyBlanket

oleaut32

UnRegisterTypeLi
UnRegisterTypeLibForUser
RegisterTypeLibForUser
RegisterTypeLi
LoadTypeLibEx
VariantCopyInd
SysReAllocString
SysFreeString
SafeArrayDestroyDescriptor
SafeArrayDestroyData
SafeArrayUnaccessData
CreateDispTypeInfo
SafeArrayAllocData
SafeArrayAllocDescriptorEx
SafeArrayCreateVector
SysAllocString
VariantTimeToSystemTime
VarR8FromDec
SafeArrayGetVartype
OleLoadPicture
QueryPathOfRegTypeLi
VariantCopy
VariantClear
CreateStdDispatch
DispCallFunc
VariantChangeType
SysStringLen
SafeArrayAccessData
VariantInit

wtsapi32

WTSSendMessageW

Sections

.text
Size: - Virtual size: 672KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: - Virtual size: 198KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: - Virtual size: 44KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: - Virtual size: 26KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

UHYUw0
Size: - Virtual size: 2.7MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

UHYUw1
Size: 4.5MB - Virtual size: 4.5MB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.reloc
Size: 512B - Virtual size: 156B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.rsrc
Size: 25KB - Virtual size: 25KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

a3135969e0ac42572dbad2573a143bf3

Headers

DLL Characteristics

File Characteristics

Imports

wsock32

version

winmm

comctl32

mpr

wininet

psapi

iphlpapi

userenv

uxtheme

kernel32

user32

gdi32

comdlg32

advapi32

shell32

ole32

oleaut32

wtsapi32

Sections

.text Size: - Virtual size: 672KB

.rdata Size: - Virtual size: 198KB

.data Size: - Virtual size: 44KB

.pdata Size: - Virtual size: 26KB

UHYUw0 Size: - Virtual size: 2.7MB

UHYUw1 Size: 4.5MB - Virtual size: 4.5MB

.reloc Size: 512B - Virtual size: 156B

.rsrc Size: 25KB - Virtual size: 25KB

.text
Size: - Virtual size: 672KB

.rdata
Size: - Virtual size: 198KB

.data
Size: - Virtual size: 44KB

.pdata
Size: - Virtual size: 26KB

UHYUw0
Size: - Virtual size: 2.7MB

UHYUw1
Size: 4.5MB - Virtual size: 4.5MB

.reloc
Size: 512B - Virtual size: 156B

.rsrc
Size: 25KB - Virtual size: 25KB