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

Static analysis result for SHA-256 f3adf91c3cd1e972…

MALICIOUS

Office (OLE) / .DOC

170.5 KB Created: 2019-03-28 15:01:00 Authoring application: Microsoft Office Word
MD5: d6d829d3b224c9d9a443426c34c36101 SHA-1: d2754eb41b9f9467368ad27b88325bc7aca6c728 SHA-256: f3adf91c3cd1e972bff7f230f24729c6e69737862b88b491720f05a6fda282f4
200 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing a significant amount of VBA macro code, specifically triggering an AutoOpen event. The presence of a GetObject call within the autoexecuting VBA p-code suggests an attempt to load and execute external code. While the document body is heavily corrupted and unreadable, the macro heuristics strongly indicate a downloader or dropper functionality. No specific malware family could be identified, but the techniques used are common for initial stage malware delivery.

Heuristics 6

  • ClamAV: Doc.Malware.Dspf-6915759-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Dspf-6915759-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
45491b64aadfe0906f96aad9c3246b43b0e83b6acaebe239ab7f089aa752c44a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21672 bytes

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