MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
The file is identified as a malicious Excel 4.0 macro sheet, specifically flagged as Emotet. The presence of XLM macros indicates an attempt to execute code directly from the spreadsheet. The ClamAV detection name further supports the Emotet family attribution and suggests a downloader functionality. This points to an attack pattern where the macro is used to fetch and run additional malicious content.
Heuristics 3
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Excel 4.0 macro sheet (1 sheet(s)) critical 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. The macro sheet is stored as XLSB/BIFF12 binary content, which many XML-only OOXML scanners miss.
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XLSB international XLM macro sheet hidden in .xlsx critical OOXML_XLSB_INTL_MACROSHEET_IN_XLSXOOXML package is named .xlsx but contains XLSB workbook parts and an international Excel 4.0 macro sheet. This hides XLM macro execution from scanners that trust the extension or only inspect XML worksheet parts. The technique is macro execution, not a document-parser CVE.
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ClamAV: Xls.Downloader.Emotet-OOXML_XL-af43432fbcb8603c-9980048-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Downloader.Emotet-OOXML_XL-af43432fbcb8603c-9980048-0
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_sheet_00.bina2d4f9910b57a5ea9f0f60a8236ec6d4a482a9e70e10e8d1d85ef6205b8ccd09 |
xlm-macrosheet | OOXML XLM macro sheet: xl/macrosheets/intlsheet1.bin | 1799 bytes |
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