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

Static analysis result for SHA-256 0fa784f6a6eaad80…

MALICIOUS

Office (OLE) / .DOCX

160.8 KB Created: 2020-09-17 22:23:00 Authoring application: Microsoft Office Word
MD5: 00023037b78d9139a1203760649ec06f SHA-1: 3785217115c4c6677d620af3eb933dec4fb1f6dc SHA-256: 0fa784f6a6eaad808c6f9037d5515f435da8c204edba06b50d4839499bccd481
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate Malicious Code

The sample contains a Document_Open VBA macro that is triggered upon opening the document. This macro utilizes CreateObject and obfuscated code, indicating an attempt to download and execute a secondary payload. The ClamAV detection 'Doc.Downloader.Generic-9763113-0' further supports this downloader functionality. The VBA code is heavily obfuscated, making it difficult to determine the exact download URL or execution method without further dynamic analysis.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763113-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763113-0
  • 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
98a29bdf4abf669a96318f520c9bfe3aa10e950f57f7c585bdcdcff6e6ad90b2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21952 bytes

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