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

Static analysis result for SHA-256 85f422fcd5620454…

MALICIOUS

Office (OLE) / .XLS

1.67 MB Created: 2015-06-05 18:19:34 Authoring application: Microsoft Excel
MD5: 8586d6e894f67e2a18b10e6256d5b598 SHA-1: 4fb2e368abf5f0d0e68c3a9f6bf7634431165ce8 SHA-256: 85f422fcd5620454b220780724755ca263aea917a2b270ff48ea8aff901d71e7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample is an Excel 4.0 (XLM) macro-enabled workbook containing an Auto_Open macro. This macro references the URL http://itelsys.ma/prod/education.php, which is likely used to download and execute a second-stage payload. The presence of an Auto_Open macro and a payload URL strongly indicates a malicious intent to compromise the user's system.

Heuristics 4

  • XLM Auto_Open workbook with payload URL or enable-content lure critical OLE_XLM_AUTOOPEN_PAYLOAD_LURE
    Workbook contains an Excel 4.0 macro sheet with Auto_Open / Auto_Close and also exposes a payload URL or enable-content lure in the OLE bytes. This combination is a high-confidence XLM downloader/social-engineering pattern even when formula recovery cannot decode the full macro chain.
  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • 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://itelsys.ma/prod/education.php

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
7dc8bfdfd59385961ea33b337d25648ab14ca75a397b2eb0a141b9183f72aafd		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1563 bytes

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