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

Static analysis result for SHA-256 13431cff4346b87e…

MALICIOUS

Office (OLE) / .DOCX

194.9 KB Created: 2020-09-18 21:15:00 Authoring application: Microsoft Office Word
MD5: fdeffa3396f690f18c4b590c0202cbf2 SHA-1: 60076cbb4c5e968ff106644b73f5ed3a7b9609e0 SHA-256: 13431cff4346b87ec1e099ca8da43a0b6b7dca250d9c69bbc46b8f28dd09a68e
202 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This indicates an attempt to execute malicious code upon opening. The ClamAV detection and heuristic firings strongly suggest this is a downloader. No specific URLs or C2 infrastructure were directly extracted, but the presence of macros and the 'downloader' classification point to an initial access via spearphishing attachment, followed by an attempt to download further malicious content.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763611-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763611-0
  • 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
27aa07f405fa9b3280133cc26ba8fa4c11df7235c7ef1a37f33a0286291c2144		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19156 bytes

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