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

Static analysis result for SHA-256 6251fe34a473b9a4…

MALICIOUS

Office (OLE) / .DOCX

215.5 KB Created: 2020-09-21 07:35:00 Authoring application: Microsoft Office Word
MD5: 31f61083546b6a8f7995122e54743707 SHA-1: 26b93c91020ed7c95526646ffc84865920425731 SHA-256: 6251fe34a473b9a4b4e6c0b0ef652f0a69353b1917bc54295b2d9f8d8cdd53a9
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 designed to execute automatically. 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 macro's execution upon opening strongly suggests a spearphishing attachment delivery method.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764473-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764473-0
  • 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
a72546be4835befa0cd5934bb3d180228dbaffbae6f31f70f11c03f05171f092		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19249 bytes

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