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

Static analysis result for SHA-256 678355b541ffa2eb…

MALICIOUS

Office (OLE) / .DOCX

195.2 KB Created: 2020-09-18 21:15:00 Authoring application: Microsoft Office Word
MD5: a433e119823f55e31c22602e67f04a82 SHA-1: 13bee393488c83e3d1d10454d438358f5d239602 SHA-256: 678355b541ffa2eb21d7b767a9e6039f3447aaaad39161002cf3b66c1d44c1dc
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initiating malicious activity. The macro utilizes CreateObject, indicating it likely attempts to download and execute a second-stage payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. The embedded URL was confirmed benign, so the payload delivery mechanism is not directly observable from this sample.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763611-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763611-0
  • 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
27aa07f405fa9b3280133cc26ba8fa4c11df7235c7ef1a37f33a0286291c2144		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19156 bytes

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