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

Static analysis result for SHA-256 89d36570b04dbd40…

MALICIOUS

Office (OLE) / .XLS

136.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 6f0fbda5aba183a77329ced0b074e955 SHA-1: 1cf9509d80c0f181e3972cf24d992b0bcbcd926e SHA-256: 89d36570b04dbd402dfa2c7949b9f022d57d727ca2fdcfc83f03961838085965
162 Risk Score

Malware Insights

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

The file is an Excel spreadsheet containing VBA macros, with both Auto_Open and Auto_Close subroutines present, indicating immediate execution upon opening. The ClamAV detection 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. Although the VBA script itself appears to be primarily for UI manipulation, the presence of embedded URLs points to a downloader attempting to fetch and execute a secondary payload. The specific URLs extracted are the primary indicators of compromise.

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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