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

Static analysis result for SHA-256 73a492fe6fc157ba…

MALICIOUS

Office (OLE) / .DOCX

265.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word
MD5: 75eda4066f7fb93ad4e56786e39e604f SHA-1: 459b8905794d3fe3b0cb7c9d499f327e2467a477 SHA-256: 73a492fe6fc157ba3c67465b8a99e6a20c475f918cfb9639af72bf17dca1f0fe
202 Risk Score

Malware Insights

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

The file contains VBA macros, including a Document_Open macro that uses CreateObject, indicating malicious intent. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. The VBA script appears to be heavily obfuscated but likely attempts to download and execute a second-stage payload, as suggested by the 'CreateObject' call and the downloader heuristic.

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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