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

Static analysis result for SHA-256 74bb469bc2970d9c…

MALICIOUS

Office (OLE) / .DOCX

288.4 KB Created: 2020-10-29 11:27:00 Authoring application: Microsoft Office Word
MD5: 3ad78d3297d6e153f1794a6edd31d7a2 SHA-1: 16e78e054eb2c2f0fb817d02ce8c5414465b833e SHA-256: 74bb469bc2970d9c977de84177c8f97cf95b8bbe35cceddd9743ad50bbf05d34
202 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject. This indicates an attempt to execute arbitrary code. The ClamAV detection as 'Doc.Downloader.EmotetRed02224-9938637-0' strongly suggests a downloader functionality. The obfuscated nature of the VBA script, including string concatenation and complex variable assignments, points towards deobfuscation techniques to hide the payload's origin or execution method. The presence of the 'macros.bas' artifact further supports the macro-based execution.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
898dac0a9fbba39aaf7a14ff7100c80bc81af6e0cb0f2cf6d397c84d46877d50		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18710 bytes

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