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

Static analysis result for SHA-256 818a38c5ed237846…

MALICIOUS

Office (OLE) / .DOCX

193.1 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word
MD5: 6cd31aa5eb6a9fa71547e7a00e8b7a01 SHA-1: 153bbc41035ea6b154d462e8e9bf4a8b38ec6c97 SHA-256: 818a38c5ed237846eff052db6fc103a6359c3bba18679dcce7dc5203ed68e2ab
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample 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 'Doc.Downloader.Generic-9763532-0' strongly suggests the macro's purpose is to download a secondary payload. No specific family could be identified, but the technique is common for initial infection vectors.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
  • 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
ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20213 bytes

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