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

Static analysis result for SHA-256 ab523acae165286b…

MALICIOUS

Office (OLE) / .XLSX

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 696ba2d572d39bae76bd91919fad2c61 SHA-1: 0436ac9461734f0c9e843f519185594c517dee02 SHA-256: ab523acae165286b7dbc6819412eb8ec0ceb3918a279a7beef38a698eb47bbf3
162 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet containing VBA macros, including an Auto_Open subroutine, which is a common technique for executing malicious code upon opening. 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 specific family could be identified, but the behavior points to a downloader.

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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