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

Static analysis result for SHA-256 6838da271d0d1b3e…

MALICIOUS

Office (OLE) / .DOCX

234.9 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word
MD5: cd42f74e03a0d3dd8dd8470690e04519 SHA-1: 9799a8c85210550bcad6dad1bb4d0b65690cc1ab SHA-256: 6838da271d0d1b3e87290168d3717f5b627a6021ececd73b0408522c0f5f3aaa
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is a Microsoft Office document with a high-confidence detection for VBA macros, specifically triggering a Document_Open macro and a CreateObject call. The VBA code is heavily obfuscated, indicating an attempt to hide its malicious functionality, which is likely to download and execute a second-stage payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this assessment.

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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