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

Static analysis result for SHA-256 ce35f48e3576a11f…

MALICIOUS

Office (OOXML) / .XLSX

81.3 KB Created: 2021-02-26 07:53:41 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-03-01
MD5: ed5575e9d4ed14a76bb27ae2575b9531 SHA-1: 95205a114e419b51999fea199f11066d9ab73c9a SHA-256: ce35f48e3576a11fdb2a8d40d1a8c3858573c8a2d0c4ca445f5b8ccd27399e49
60 Risk Score

Heuristics 1

  • Excel 4.0 macro sheet (1 sheet(s)) critical 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. The macro sheet is stored as XLSB/BIFF12 binary content, which many XML-only OOXML scanners miss.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.bin xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.bin 4569 bytes
SHA-256: f629aa61effb57aa6086022643e821a190adc4f664bb83f85bbe99b934f6064b
Preview script
First 1,000 lines of the extracted script
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