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

Static analysis result for SHA-256 feec0f6c322f785e…

MALICIOUS

Office (OLE) / .XLSX

644.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-05-29
MD5: 14faa410e85c2e64f4069c5418b73235 SHA-1: 42721e0b6cb7b2638cd93c30d0e3c295e488367c SHA-256: feec0f6c322f785ecf973976c88f91c42e152236dfcc589a2af9cbf9067066fe
62 Risk Score

Malware Insights

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

The presence of an Excel 4.0 macro sheet (XLM) indicates the potential for malicious macro execution. The extracted document body contains strings that suggest a download and execution routine, referencing URLs like 'dharamdiwan.in/njipkUcz/ork.html' and 'unlenoirramosjr.com/7r9JyFLo/ork.html'. These URLs are likely used to fetch and run a secondary payload.

Heuristics 3

  • Excel 4.0 (XLM) macro sheet uses dangerous capability functions high OLE_XLM_DANGEROUS_FN_STATIC
    Workbook contains an Excel 4.0 macro sheet whose formulas reference two or more dangerous capability functions (e.g. CALL into a Win32 API such as URLDownloadToFile, EXEC to launch a process, REGISTER an external DLL procedure, or FWRITE/FOPEN to drop a file) with an Auto_Open / Auto_Close auto-execution name. This is the canonical XLM downloader/dropper shape and is recovered directly from the BIFF records, so it fires even when the full macro chain cannot be deobfuscated.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://dharamdiwan.in/njipkUcz/ork.html Referenced by macro
    • https://lenoirramosjr.com/7r9JyFLo/ork.htmlReferenced by macro

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