Appt[.] Letter-SCM2403795[.]pdf[.]exe

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General

Target

Appt. Letter-SCM2403795.pdf.exe
Size

1.2MB
MD5

0aa90b060df8489a4f57fae9a9e7d050
SHA1

0e63264bbd96091f6fd5ad6fc3826a28a6979bb9
SHA256

181d9736138c254a9fa190542fd53cfc314ba0ceb6d67323ab271a99fc080416
SHA512

1eec467dfd4d1ab106ddc7fbee0517ad343abaeb583ae93cddaef5ba3bda43089bc902285d0eb5772e41be5ebf7539f62a2255a5dfbc9badeea7c586003e0942
SSDEEP

24576:ffmMv6Ckr7Mny5QLFtQvgCT3p5kGzs4bIWtk/Ahe5usChkdI:f3v+7/5QLFkJLpyGwOkQhs6kdI

Score

5^/10

Malware Config

Signatures

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
sample	autoit_exe

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
Appt. Letter-SCM2403795.pdf.exe

Files

Appt. Letter-SCM2403795.pdf.exe
.exe windows:5 windows x86 arch:x86

870b8e75c7190e202e9c6c81dff1040c

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE

Imports

wsock32

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

version

VerQueryValueW
GetFileVersionInfoW
GetFileVersionInfoSizeW

winmm

timeGetTime
waveOutSetVolume
mciSendStringW

comctl32

ImageList_Remove
ImageList_SetDragCursorImage
ImageList_BeginDrag
ImageList_DragEnter
ImageList_DragLeave
ImageList_EndDrag
ImageList_DragMove
ImageList_ReplaceIcon
ImageList_Create
InitCommonControlsEx
ImageList_Destroy

mpr

WNetCancelConnection2W
WNetGetConnectionW
WNetAddConnection2W
WNetUseConnectionW

wininet

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

psapi

EnumProcesses
GetModuleBaseNameW
GetProcessMemoryInfo
EnumProcessModules

userenv

CreateEnvironmentBlock
DestroyEnvironmentBlock
UnloadUserProfile
LoadUserProfileW

kernel32

HeapAlloc
Sleep
GetCurrentThreadId
RaiseException
MulDiv
GetVersionExW
GetSystemInfo
MultiByteToWideChar
WideCharToMultiByte
GetModuleHandleW
QueryPerformanceCounter
VirtualFreeEx
OpenProcess
VirtualAllocEx
WriteProcessMemory
ReadProcessMemory
CreateFileW
SetFilePointerEx
ReadFile
WriteFile
FlushFileBuffers
TerminateProcess
CreateToolhelp32Snapshot
Process32FirstW
Process32NextW
SetFileTime
GetFileAttributesW
FindFirstFileW
FindClose
DeleteFileW
FindNextFileW
lstrcmpiW
MoveFileW
CopyFileW
CreateDirectoryW
RemoveDirectoryW
SetSystemPowerState
QueryPerformanceFrequency
FindResourceW
LoadResource
LockResource
SizeofResource
GetProcessHeap
OutputDebugStringW
GetLocalTime
CompareStringW
CompareStringA
InterlockedIncrement
InterlockedDecrement
DeleteCriticalSection
EnterCriticalSection
LeaveCriticalSection
InitializeCriticalSectionAndSpinCount
GetStdHandle
CreatePipe
InterlockedExchange
TerminateThread
GetTempPathW
GetTempFileNameW
VirtualFree
FormatMessageW
GetExitCodeProcess
SetErrorMode
GetPrivateProfileStringW
WritePrivateProfileStringW
GetPrivateProfileSectionW
WritePrivateProfileSectionW
GetPrivateProfileSectionNamesW
FileTimeToLocalFileTime
FileTimeToSystemTime
SystemTimeToFileTime
LocalFileTimeToFileTime
GetDriveTypeW
GetDiskFreeSpaceExW
GetDiskFreeSpaceW
GetVolumeInformationW
SetVolumeLabelW
CreateHardLinkW
DeviceIoControl
SetFileAttributesW
GetShortPathNameW
CreateEventW
SetEvent
GetEnvironmentVariableW
SetEnvironmentVariableW
GlobalLock
GlobalUnlock
GlobalAlloc
GetFileSize
GlobalFree
GlobalMemoryStatusEx
Beep
GetComputerNameW
GetWindowsDirectoryW
GetSystemDirectoryW
GetCurrentProcessId
GetCurrentThread
GetProcessIoCounters
CreateProcessW
SetPriorityClass
LoadLibraryW
VirtualAlloc
LoadLibraryExW
HeapFree
WaitForSingleObject
CreateThread
DuplicateHandle
GetLastError
CloseHandle
GetCurrentProcess
GetProcAddress
LoadLibraryA
FreeLibrary
GetModuleFileNameW
GetFullPathNameW
ExitProcess
ExitThread
GetSystemTimeAsFileTime
SetCurrentDirectoryW
IsDebuggerPresent
GetCurrentDirectoryW
ResumeThread
GetStartupInfoW
TlsGetValue
TlsAlloc
TlsSetValue
TlsFree
SetLastError
HeapSize
GetCPInfo
GetACP
GetOEMCP
IsValidCodePage
UnhandledExceptionFilter
SetUnhandledExceptionFilter
GetModuleFileNameA
HeapReAlloc
HeapCreate
SetHandleCount
GetFileType
GetStartupInfoA
SetStdHandle
GetConsoleCP
GetConsoleMode
LCMapStringW
LCMapStringA
RtlUnwind
SetFilePointer
GetTimeZoneInformation
GetTimeFormatA
GetDateFormatA
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetCommandLineW
GetTickCount
GetStringTypeA
GetStringTypeW
GetLocaleInfoA
GetModuleHandleA
WriteConsoleA
GetConsoleOutputCP
WriteConsoleW
CreateFileA
SetEndOfFile
EnumResourceNamesW
SetEnvironmentVariableA

user32

SetWindowPos
GetCursorInfo
RegisterHotKey
ClientToScreen
GetKeyboardLayoutNameW
IsCharAlphaW
IsCharAlphaNumericW
IsCharLowerW
IsCharUpperW
GetMenuStringW
GetSubMenu
GetCaretPos
IsZoomed
MonitorFromPoint
GetMonitorInfoW
SetWindowLongW
SetLayeredWindowAttributes
FlashWindow
GetClassLongW
TranslateAcceleratorW
IsDialogMessageW
GetSysColor
InflateRect
DrawFocusRect
DrawTextW
FrameRect
DrawFrameControl
FillRect
PtInRect
DestroyAcceleratorTable
CreateAcceleratorTableW
SetCursor
GetWindowDC
GetSystemMetrics
GetActiveWindow
CharNextW
wsprintfW
RedrawWindow
DrawMenuBar
DestroyMenu
SetMenu
GetWindowTextLengthW
CreateMenu
IsDlgButtonChecked
DefDlgProcW
ReleaseCapture
SetCapture
WindowFromPoint
CreateIconFromResourceEx
mouse_event
ExitWindowsEx
SetActiveWindow
FindWindowExW
EnumThreadWindows
SetMenuDefaultItem
InsertMenuItemW
IsMenu
TrackPopupMenuEx
GetCursorPos
DeleteMenu
CheckMenuRadioItem
CopyImage
GetMenuItemCount
SetMenuItemInfoW
GetMenuItemInfoW
SetForegroundWindow
IsIconic
FindWindowW
SystemParametersInfoW
PeekMessageW
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
GetWindowThreadProcessId
AttachThreadInput
GetFocus
GetWindowTextW
ScreenToClient
SendMessageTimeoutW
EnumChildWindows
CharUpperBuffW
GetClassNameW
GetParent
GetDlgCtrlID
SendMessageW
MapVirtualKeyW
PostMessageW
GetWindowRect
SetUserObjectSecurity
GetUserObjectSecurity
CloseDesktop
CloseWindowStation
OpenDesktopW
SetProcessWindowStation
GetProcessWindowStation
OpenWindowStationW
MessageBoxW
DefWindowProcW
MoveWindow
AdjustWindowRectEx
SetRect
SetClipboardData
EmptyClipboard
CountClipboardFormats
CloseClipboard
GetClipboardData
IsClipboardFormatAvailable
OpenClipboard
BlockInput
GetMessageW
LockWindowUpdate
DispatchMessageW
GetMenuItemID
TranslateMessage
SetFocus
PostQuitMessage
KillTimer
CreatePopupMenu
RegisterWindowMessageW
SetTimer
ShowWindow
CreateWindowExW
RegisterClassExW
LoadIconW
LoadCursorW
GetSysColorBrush
GetForegroundWindow
MessageBoxA
DestroyIcon
UnregisterHotKey
CharLowerBuffW
MonitorFromRect
keybd_event
LoadImageW
GetWindowLongW

gdi32

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

comdlg32

GetSaveFileNameW
GetOpenFileNameW

advapi32

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

shell32

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

ole32

OleSetMenuDescriptor
MkParseDisplayName
OleSetContainedObject
CoInitialize
CoUninitialize
CoCreateInstance
CreateStreamOnHGlobal
CoTaskMemAlloc
CoTaskMemFree
CLSIDFromString
StringFromCLSID
IIDFromString
StringFromIID
OleInitialize
CreateBindCtx
CLSIDFromProgID
CoInitializeSecurity
CoCreateInstanceEx
CoSetProxyBlanket
OleUninitialize

oleaut32

SafeArrayAllocData
SafeArrayAllocDescriptorEx
SysAllocString
OleLoadPicture
SafeArrayGetVartype
SafeArrayDestroyData
SafeArrayAccessData
VarR8FromDec
VariantTimeToSystemTime
VariantClear
VariantCopy
VariantInit
SafeArrayDestroyDescriptor
LoadRegTypeLi
GetActiveObject
SafeArrayUnaccessData

Sections

.text
Size: 512KB - Virtual size: 512KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 54KB - Virtual size: 54KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 26KB - Virtual size: 105KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 37KB - Virtual size: 36KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

Sharing

General

Malware Config

Signatures

Files

870b8e75c7190e202e9c6c81dff1040c

Headers

DLL Characteristics

File Characteristics

Imports

wsock32

version

winmm

comctl32

mpr

wininet

psapi

userenv

kernel32

user32

gdi32

comdlg32

advapi32

shell32

ole32

oleaut32

Sections

.text Size: 512KB - Virtual size: 512KB

.rdata Size: 54KB - Virtual size: 54KB

.data Size: 26KB - Virtual size: 105KB

.rsrc Size: 37KB - Virtual size: 36KB

.text
Size: 512KB - Virtual size: 512KB

.rdata
Size: 54KB - Virtual size: 54KB

.data
Size: 26KB - Virtual size: 105KB

.rsrc
Size: 37KB - Virtual size: 36KB