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

Static analysis result for SHA-256 07709fe759a399f1…

MALICIOUS

Office (OLE) / .DOCX

218.8 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word
MD5: 04a5271aff20f4a26c189c2706d57d95 SHA-1: 0854a917c1189d2c27e2f2c585e57b5f35a96f02 SHA-256: 07709fe759a399f11394a5d17a98a42431d9ba07f16544b507d28e3d39141643
202 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros, specifically triggering a Document_Open macro and CreateObject calls. The ClamAV detection indicates it's a downloader. The VBA script appears to be heavily obfuscated, but its structure suggests it attempts to replace specific strings, likely to download and execute a secondary payload. The presence of VBA macros and the Document_Open execution points to a spearphishing attachment delivery method.

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
432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18870 bytes

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