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

Static analysis result for SHA-256 7af2bfaffa94da58…

MALICIOUS

Office (OLE) / .DOCX

172.8 KB Created: 2020-10-02 08:05:00 Authoring application: Microsoft Office Word
MD5: ff7df7eee43436cb6a003aa4c38f2225 SHA-1: 73434ad0082b1f649f360264e0d22e3c8d97ec29 SHA-256: 7af2bfaffa94da58c073910166c0cdfc226d1a3e7009f248a0d86ddc27ceb1a2
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This indicates an attempt to execute code automatically when the document is opened. The ClamAV detection as 'Doc.Downloader' strongly suggests the macro's purpose is to download and execute a secondary payload. While the VBA code is heavily obfuscated, the presence of the Document_Open auto-execution and CreateObject calls are clear indicators of malicious intent.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7051a023ff8c92545e9437031d326fa9393a821a4be28f0566a57a8f3610dd93		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10600 bytes

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