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

Static analysis result for SHA-256 dbd58df04d603694…

MALICIOUS

Office (OLE) / .XLSX

188.0 KB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: 49c3ee8fcf4d2f83e866019b95b0a557 SHA-1: 776b5f34cd7f5900b3c9fc98e7b65e1115bfad9f SHA-256: dbd58df04d603694d9997d6c0037781491109fe61473b61e3593ffe0ba40f680
60 Risk Score

Malware Insights

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

The file contains Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN heuristics. The dangerous formula API 'RUN' is present, suggesting the macro attempts to execute external code. The embedded URL 'davidachim.com/wpold/document.php' is likely the source for a second-stage payload. The document body text is fragmented and does not provide clear context, but the presence of 'DocuSign' and 'document.php' suggests a potential lure related to document signing or delivery.

Heuristics 3

  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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 http://www.iec.ch
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
38d60eee1e29da7937e8bf9335454756ac61c75039052a56c57ef465d2528720		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 11679 bytes

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