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

Static analysis result for SHA-256 5edf42ab917e9956…

MALICIOUS

Office (OLE) / .DOCX

258.6 KB Created: 2020-10-29 09:30:00 Authoring application: Microsoft Office Word
MD5: 469c706fa0d1386a4a567896f67feecf SHA-1: cf5fc58c1de13e44e61c75b888043c7fd36d5fec SHA-256: 5edf42ab917e99566d6904b93308695efb66e834390a35fcdc05d184cbca6ef8
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, and uses CreateObject, indicating a downloader. The ClamAV detection 'Doc.Downloader.Generic-9785156-0' further supports this. The VBA script appears to be obfuscated but its structure suggests it is designed to download and execute a secondary payload, likely from a URL that was not directly extracted or was benign.

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
2c8aded1cc33908777d3554a19067d8f93ed6d8269cc13dcdcff33eca45ebd5f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18919 bytes

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