Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5af61c86d1ad6fb3…

MALICIOUS

Office (OLE)

154.1 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word
MD5: 52f9e2ad0f9cf3d9707d8c5b3471deb6 SHA-1: 02223e9fd5551f94cb26b5f1198509c71ca1754c SHA-256: 5af61c86d1ad6fb398e7834fac732b5ea97a00818295e8af9f427df058e64fbd
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a malicious Office document containing a Document_Open VBA macro. This macro utilizes CreateObject to execute obfuscated code, likely to download and execute a second-stage payload. The presence of the Document_Open macro and the generic ClamAV detection strongly suggest a downloader or droppper functionality.

Heuristics 6

  • ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
  • 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
bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18582 bytes

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