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

Static analysis result for SHA-256 b17fcba15d1b9367…

MALICIOUS

Office (OLE) / .XLSX

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: e5cc58b3cf7baccc32384d0894b7fa84 SHA-1: 4c841351f51b318313674a81d5619f57bf9786a3 SHA-256: b17fcba15d1b9367a3d8d48a646c2688a0e07e936d5e3f0ac69559db3abbc57e
162 Risk Score

Malware Insights

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS and OLE_VBA_AUTO indicate that this XLSX file contains malicious VBA macros. The Auto_Open macro suggests immediate execution upon opening. While the provided VBA script is truncated, the presence of embedded URLs strongly suggests a downloader pattern. The script likely attempts to download and execute a second-stage payload from one of the listed 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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