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

Static analysis result for SHA-256 6f259bd35269f76a…

MALICIOUS

Office (OLE) / .DOCX

172.6 KB Created: 2020-09-17 10:17:00 Authoring application: Microsoft Office Word
MD5: 9cd5ea2b5e82207b853e3629e5ec74d6 SHA-1: 774ea6ca040da76056d5e8fd644da720d5b421f1 SHA-256: 6f259bd35269f76ac42871f5c84e9d480c5ab4b878108a381a7040a8cc0b5434
202 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. This indicates an attempt to download and execute a second-stage payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. While the exact URL for the payload download is not directly visible due to obfuscation, the presence of VBA macros and the downloader heuristic strongly suggest this attack pattern.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9762674-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9762674-0
  • 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
9ba8ec3966e91d175acafd30ec3438df19c84a3d5c19c35fd5e40d1b639faa28		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20635 bytes

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