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

Static analysis result for SHA-256 7a54b9e5d5090d61…

MALICIOUS

Office (OLE) / .DOCX

215.3 KB Created: 2020-09-21 07:35:00 Authoring application: Microsoft Office Word
MD5: a71fbcbc6b97df2199bf4d5b3e7bd0ae SHA-1: aeb5b4c4423b8695fa58f321444e1a45eba719ac SHA-256: 7a54b9e5d5090d615e8e104632ff7c966103ba016bdb7722525a3eb1aed17c13
242 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 VBA macros, specifically triggering on Document_open. Heuristics indicate the use of CreateObject and GetObject, common for executing downloaded payloads. The ClamAV detection 'Doc.Downloader.Generic-9764473-0' strongly suggests a downloader functionality. The VBA script, while obfuscated, likely orchestrates the download and execution of a secondary malicious component.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764473-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764473-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
a72546be4835befa0cd5934bb3d180228dbaffbae6f31f70f11c03f05171f092		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19249 bytes

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