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

Static analysis result for SHA-256 0141fc68f8d61f3c…

MALICIOUS

Office (OLE) / .DOCX

234.7 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word
MD5: 12db4777ccece058aa36664ccb679fc0 SHA-1: 6589d217f41d4bf2876c9007820b2acd84534f63 SHA-256: 0141fc68f8d61f3c6ab01420927eb224eb83af6d701944e66d37f19898cf1b4e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, indicate malicious intent. The VBA script, though obfuscated, contains string concatenation that likely forms a URL for downloading a secondary payload, a common technique for malware delivery. The presence of the Document_Open macro and CreateObject calls strongly suggests the execution of a downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • 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
5aa3aad97a35a46de04017100e8aadce01daec323c971d220dcadfd4335841c1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18882 bytes

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