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

Static analysis result for SHA-256 0f3dcf665c7ea9ad…

MALICIOUS

Office (OLE) / .DOCX

213.2 KB Created: 2020-09-21 13:01:00 Authoring application: Microsoft Office Word
MD5: d4d66cfec5f15f0a4e78dbe3fa13e704 SHA-1: f188a552bbf23bb9ea4f248457effaf790dd73e8 SHA-256: 0f3dcf665c7ea9ad31fbcaa324e8f714b5611ca2d55c539279fe724acbf61cfd
242 Risk Score

Malware Insights

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

The file is a DOCX document containing VBA macros, including a Document_Open auto-execution macro. Heuristics indicate the use of CreateObject and GetObject, common for downloading and executing payloads. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. No specific family could be identified, but the behavior is consistent with a macro-based downloader.

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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