MALICIOUS
150
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file is an OOXML Excel document containing critical Excel 4.0 macros. These macros utilize dangerous functions such as RUN, FORMULA, RETURN, HALT, and GOTO, which are known to be used for executing arbitrary commands and downloading payloads. While VBA macros are present, the primary threat appears to stem from the XLM macros, indicating a potential downloader or initial execution stage for a more complex attack.
Heuristics 5
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Excel 4.0 macro sheet (1 sheet(s)) critical 1 related finding OOXML_XLM_MACROSHEETSpreadsheet contains an Excel 4.0 (XLM) macro sheet — XLM was a major Office malware vector during 2020-2022 and evaded many VBA-focused controls before Microsoft tightened XLM defaults. Even legitimate XLM use is rare in modern workbooks.
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Dangerous XLM formula APIs: RUN, FORMULA, RETURN, HALT, GOTO critical OOXML_XLM_DANGEROUS_FNExcel 4.0 macro sheet uses formula APIs that call directly into Win32 (=CALL/=EXEC/=REGISTER/=FORMULA). These are the primitives used to download payloads, write files, and start processes from an XLM macro without invoking VBA.
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VBA project inside OOXML medium OOXML_VBADocument contains a VBA project — VBA macros present
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Hidden worksheet (hidden) low OOXML_HIDDEN_SHEETExcel workbook contains 1 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
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Embedded URL info EMBEDDED_URLOne 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.openxmlformats.org/spreadsheetml/2006/main In document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/excel/2006/mainIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/spreadsheetml/2009/9/acIn document text (OOXML body / shared strings)
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas |
vba-macro | oletools.olevba.extract_macros (decoded VBA source from OOXML) | 1292 bytes |
SHA-256: de652c35b31a90c73bdca9ae3130c582b3dcd2251f9211f62b10f5977a8b381f |
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Preview scriptFirst 1,000 lines of the extracted script
Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Attribute VB_Name = "Sheet3"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Attribute VB_Name = "UserForm1"
Attribute VB_Base = "0{931EDA34-5735-4A7C-B764-F382937F14C1}{53B2BD9C-5356-4AF1-BAD6-03A29D7B9F1F}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Private Sub TabStrip1_Change()
End Sub
Attribute VB_Name = "Sheet2"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
|
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vbaProject_00.bin |
vba-project | OOXML VBA project: xl/vbaProject.bin | 24576 bytes |
SHA-256: 99500b4748e48c918ea9c139c46b6414cc4d9493e2bbce5b8958faf9c98efa86 |
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xlm_sheet_00.xml |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet1.xml | 368661 bytes |
SHA-256: 0fd48b95806d47434b16608821668ef5936a6a1c8f4854490b70db8b76ce4422 |
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Preview scriptFirst 1,000 lines of the extracted script
<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <xm:macrosheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:xm="http://schemas.microsoft.com/office/excel/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="x14ac" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac"><dimension ref="A1:CA220"/><sheetViews><sheetView showFormulas="1" zoomScaleNormal="100" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="12.75" x14ac:dyDescent="0.2"/><cols><col min="1" max="1" width="14.42578125" customWidth="1"/><col min="2" max="2" width="12.85546875" customWidth="1"/><col min="3" max="3" width="10.42578125" customWidth="1"/><col min="4" max="4" width="31.140625" bestFit="1" customWidth="1"/><col min="5" max="5" width="21.42578125" bestFit="1" customWidth="1"/><col min="6" max="6" width="18" bestFit="1" customWidth="1"/><col min="7" max="7" width="18.28515625" customWidth="1"/><col min="8" max="8" width="26.5703125" customWidth="1"/><col min="10" max="10" width="8.7109375" customWidth="1"/><col min="11" max="11" width="12.140625" bestFit="1" customWidth="1"/><col min="12" max="12" width="16.140625" customWidth="1"/><col min="13" max="13" width="14.140625" customWidth="1"/><col min="14" max="14" width="16.85546875" customWidth="1"/><col min="15" max="15" width="10.28515625" bestFit="1" customWidth="1"/><col min="16" max="16" width="23.28515625" bestFit="1" customWidth="1"/><col min="17" max="17" width="9.85546875" customWidth="1"/><col min="18" max="18" width="19" bestFit="1" customWidth="1"/><col min="19" max="19" width="21" customWidth="1"/><col min="20" max="20" width="16.42578125" customWidth="1"/><col min="21" max="21" width="23.7109375" customWidth="1"/><col min="22" max="22" width="23" customWidth="1"/><col min="23" max="23" width="18.85546875" bestFit="1" customWidth="1"/><col min="24" max="24" width="14.5703125" bestFit="1" customWidth="1"/><col min="25" max="25" width="20" customWidth="1"/><col min="26" max="26" width="20.28515625" customWidth="1"/><col min="27" max="27" width="29.7109375" bestFit="1" customWidth="1"/><col min="33" max="34" width="9.140625" customWidth="1"/><col min="36" max="36" width="37.85546875" customWidth="1"/><col min="37" max="37" width="57.28515625" bestFit="1" customWidth="1"/><col min="39" max="39" width="6.85546875" customWidth="1"/><col min="40" max="40" width="11" customWidth="1"/><col min="41" max="41" width="10.42578125" customWidth="1"/><col min="42" max="42" width="11.7109375" customWidth="1"/><col min="43" max="44" width="9.140625" customWidth="1"/><col min="45" max="45" width="12.5703125" bestFit="1" customWidth="1"/><col min="47" max="47" width="67.28515625" bestFit="1" customWidth="1"/><col min="48" max="48" width="22.5703125" bestFit="1" customWidth="1"/><col min="49" max="49" width="18.28515625" customWidth="1"/><col min="51" max="51" width="70.140625" bestFit="1" customWidth="1"/><col min="52" max="52" width="9.140625" customWidth="1"/><col min="53" max="53" width="14.7109375" customWidth="1"/><col min="55" max="66" width="21.140625" customWidth="1"/><col min="68" max="68" width="12.85546875" customWidth="1"/><col min="73" max="74" width="9.140625" customWidth="1"/><col min="76" max="76" width="12.42578125" bestFit="1" customWidth="1"/><col min="77" max="77" width="27.5703125" customWidth="1"/><col min="78" max="78" width="31.42578125" bestFit="1" customWidth="1"/><col min="79" max="79" width="25.42578125" customWidth="1"/></cols><sheetData><row r="1" spans="1:79" ht="12.75" customHeight="1" x14ac:dyDescent="0.2"><c r="A1" s="2" t="s"><v>24</v></c><c r="B1" s="2" t="s"><v>25</v></c><c r="C1" s="3" t="s"><v>26</v></c><c r="D1" s="3" t="s"><v>27</v></c><c r="E1" s="3" t="s"><v>28</v></c><c r="F1" s="3" t="s"><v>29</v></c><c r="G1" s="3" t="s"><v>30</v></c><c r="H1" s="3" t="s"><v>525</v></c><c r="J1" s="2" t="s"><v>31</v></c><c r="K1" s="3"/><c r="N1" s="4" t="s"><v>32</v></c><c r="P1" s="4" t="s">< ... (truncated) |
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