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

Static analysis result for SHA-256 10d566256d3e680d…

MALICIOUS

Office (OLE) / .DOCX

172.2 KB Created: 2020-09-17 10:17:00 Authoring application: Microsoft Office Word
MD5: 92e9daa429d7de20f2cb0efdc3fedfd4 SHA-1: 0ef73f9680f4b0cf6fd40cf97ad9f5b2c5917587 SHA-256: 10d566256d3e680d192406e23941bdeccf3b373ddafec2fda9c0e3557ed8d42e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate Malicious Code

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initial execution. The macro uses CreateObject and obfuscated string manipulation, indicating an intent to download and execute a secondary payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this assessment.

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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