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

Static analysis result for SHA-256 f0c66d605df8bf0f…

MALICIOUS

Office (OLE) / .XLSX

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: dbbf65a70841fc5df66b31bcca42fc3d SHA-1: 1a43e6665bc3be0d262fbcfdc847a3f4c6aeabb6 SHA-256: f0c66d605df8bf0f91c36f968dac5f9b825ef98128f4133ceab5508a89b60d56
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Office document containing VBA macros, with high-severity heuristics indicating the presence of Auto_Open and Auto_Close macros. The ClamAV detection 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. The embedded URLs are likely used to fetch and execute a secondary payload. No document body text was available for analysis, but the macro presence and downloader heuristic are sufficient to infer the attack pattern.

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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