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

Static analysis result for SHA-256 723d382c65591be5…

MALICIOUS

Office (OLE) / .DOCX

159.1 KB Created: 2020-09-23 21:57:00 Authoring application: Microsoft Office Word
MD5: 30caf0eced4d03b8c7adc0b48ddae9da SHA-1: f6e55fb27312ed0da8d4e766db9ca19a0af83b1d SHA-256: 723d382c65591be516dc0f62f769cd79b42fffef91a244bf773da31d1478f631
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a Microsoft Office document containing a VBA macro that is automatically executed upon opening (Document_open). The macro utilizes CreateObject, a common technique for downloading and executing additional payloads. The ClamAV detection 'Doc.Downloader.Mryv-9765643-0' further supports this functionality. The obfuscated nature of the script prevents a more detailed analysis of the payload's destination or specific actions.

Heuristics 6

  • ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
  • 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
d7dd2a73d7d39dc729b85cfde71706f8b2534ea5cd633d43e9c623fb8097a814		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20294 bytes

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