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

Static analysis result for SHA-256 6b949e40a7d3f0f7…

MALICIOUS

Office (OLE) / .DOCX

161.0 KB Created: 2020-09-17 22:23:00 Authoring application: Microsoft Office Word
MD5: ba81c1eb13a76cfa46f6f753c9d0d665 SHA-1: cd1effb240784e8be5d1e3dc8aa238c3c7b5eda4 SHA-256: 6b949e40a7d3f0f7d22bc2366dcc9f87e45378159b36a7bea2b7be654502530b
202 Risk Score

Malware Insights

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

The sample contains VBA macros that are automatically executed upon opening the document, indicated by the Document_Open macro and CreateObject heuristic firings. The VBA code appears to be obfuscated but is designed to download and execute a secondary payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this analysis.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763113-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763113-0
  • 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
98a29bdf4abf669a96318f520c9bfe3aa10e950f57f7c585bdcdcff6e6ad90b2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21952 bytes

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