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

Static analysis result for SHA-256 04136b8270e1d84f…

MALICIOUS

Office (OLE) / .DOCX

213.8 KB Created: 2020-09-21 13:01:00 Authoring application: Microsoft Office Word
MD5: 2a9e56844cd7758f4ca5de28371ace85 SHA-1: 785101c40f5d5be15fc9dd92114306cdf34cf6b8 SHA-256: 04136b8270e1d84f73c175123aa7f38165f56bd7641fb172dca3caa593f6546d
242 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject and GetObject calls. This indicates an attempt to execute malicious code upon opening. The ClamAV detection 'Doc.Downloader.Generic-9764510-0' further supports its nature as a downloader. The VBA code appears obfuscated, but the presence of auto-execution macros and the downloader heuristic strongly suggest it's designed to fetch and run a secondary payload, likely delivered via spearphishing.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764510-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764510-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
6a026cf1bf86b484c79a559ac66211fb00449c04a88f93a009af07f69e99e193		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19126 bytes

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