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

Static analysis result for SHA-256 66bec951e026a392…

MALICIOUS

Office (OLE) / .DOCX

267.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word
MD5: c55f48fb04fbc345e4054586cefd1423 SHA-1: c3903b6820da79b34924c14970b1e7a9362bf721 SHA-256: 66bec951e026a392e0adfc69b614a9ef4e22bad0ed2bf7b99ea2c1a3a83800ef
202 Risk Score

Malware Insights

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

The file contains a VBA macro that is automatically executed upon opening, as indicated by the Document_Open and CreateObject firings. The macro appears to be obfuscated but is designed to download and execute a second-stage payload. The ClamAV detection of 'Doc.Downloader.Generic' further supports this conclusion.

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
04f0b14197f396c9b03f7b934599b1b01d62a486cd3090375b867094895917c9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18531 bytes

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