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

Static analysis result for SHA-256 042b7d9208258a1a…

MALICIOUS

Office (OOXML) / .XLSM

17.1 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300
MD5: 9c47eef4c66e4587ecddb55cfc3ef1e6 SHA-1: da444ad39f513282d1918beceadc0ceb6edc0d3d SHA-256: 042b7d9208258a1a64b9a1ab0079e1bb7898a3b787167457951b810e9b126dd1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The file is an XLSM document containing Excel 4.0 macros. These macros utilize dangerous functions like RUN, HALT, and CALL, which are indicative of malicious intent. The macros are designed to download a file from the URL https://japort.com/suret/victory.php and execute it, likely as a second-stage payload.

Heuristics 4

  • 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.
  • Dangerous XLM formula APIs: RUN, HALT, 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.
  • 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://japort.com/suret/victory.php
    • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_sheet_00.xml
05cdc816f7e85f99cd2cf2ca43b75dc4f36b9c09bfdfc6fe669b915c9b77e0f6		 xlm-macrosheet OOXML XLM macro sheet: xl/macrosheets/sheet1.xml 4260 bytes

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