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

Static analysis result for SHA-256 6a265992e46570d3…

MALICIOUS

Office (OLE) / .DOCX

266.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word
MD5: 00439d7b5debe2121c3ac4ebc311d048 SHA-1: 67122a7cec33ec0cca58b8761f054bb78a8c70d7 SHA-256: 6a265992e46570d3da8ffbbd23667a7a67f3282e1a9893e683bb54c6667d5a43
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is a Microsoft Office document containing a VBA macro, specifically triggered by the Document_Open event. The macro utilizes CreateObject and appears to be obfuscated, but its primary function is to download and execute a second-stage payload, as indicated by the ClamAV detection 'Doc.Downloader.Generic-9785156-0'. The obfuscated VBA code and the presence of a downloader macro strongly suggest a malicious intent, likely delivered as a spearphishing attachment.

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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