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

Static analysis result for SHA-256 cdcdd65230104295…

MALICIOUS

Office (OOXML) / .XLSM

19.8 KB Created: 2021-03-17 08:56:57 UTC Authoring application: Microsoft Excel 16.0300
MD5: d842d815f62dcf5eee5bb727795f680e SHA-1: ae8b85a6af77ca75aff4eda28ed019173ee2fd3e SHA-256: cdcdd652301042959b05e850af6b57e493fdee816b1230d5a34b0ba0fb433a09
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell

The file is an XLSM document containing Excel 4.0 macros, indicated by the OOXML_XLM_MACROSHEET and OOXML_XLM_AUTOOPEN_DEFINEDNAME heuristics. The document body contains text prompting the user to 'Enable Editing' and 'Enable Content', a common social engineering tactic to bypass security warnings and allow macro execution. No specific URLs or executable payloads were extracted, but the presence of Auto_Open macros strongly suggests an intent to execute malicious code upon opening.

Heuristics 3

  • 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.
  • 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.
  • 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://schemas.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.microsoft.com/office/excel/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revision
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision6

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml
08e96b06295e54a171801cf9918f8f7ec2ff69c8f17934ffd9947e36f5703576		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 15410 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.