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

Heuristics 7

• Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL
  OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
• ClamAV: Doc.Downloader.Generic-9759989-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Doc.Downloader.Generic-9759989-0
• 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

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