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

Static analysis result for SHA-256 d9f63db8dc54b130…

MALICIOUS

Office (OLE) / .XLSX

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2021-10-31
MD5: 28bfc6c034e7d4a95c6d6c24ff9115a9 SHA-1: 75f9c0feebdc903489f961e8e688a4678ca474ed SHA-256: d9f63db8dc54b130b088b21c4c6733dbe9c44bb82211627834972be16e63449a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros, with both Auto_Open and Auto_Close macros detected, indicating immediate execution upon opening. The ClamAV detection name 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. The VBA script itself appears to be truncated, but the presence of macros and embedded URLs points towards a malicious downloader attempting to fetch and execute further payloads from the provided IP addresses.

Heuristics 5

  • ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://188.165.62.61/
    • http://79.141.171.170/
    • http://185.244.150.138/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
954b17b40618c472edefb57d86095b1fb0c0b22bc019811f22885378cc130af1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5040 bytes

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