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

Static analysis result for SHA-256 2a0715701189d587…

MALICIOUS

Office (OOXML) / .XLSX

106.4 KB Created: 2021-01-31 17:47:11 UTC Authoring application: Microsoft Excel 16.0300 First seen: 2021-02-19
MD5: acb967e1800b869e2752cc40a4ec59a5 SHA-1: 3a85bc98fb07511fec699c07631791ef46ac3253 SHA-256: 2a0715701189d587df4f40632957f0bbd12cc1e5847b6c8d017254d6ddce6ef1
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 2963 bytes
SHA-256: bfd2726f962c91d30ee5c01d778019d3e0935a120a1af994a41ef6b30823540d
Preview script
First 1,000 lines of the extracted script
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