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

Static analysis result for SHA-256 5f899d6ba79a78bc…

MALICIOUS

Office (OLE) / .DOCX

189.5 KB Created: 2020-10-22 16:39:00 Authoring application: Microsoft Office Word
MD5: 83047ed5bd1cc456ab5d2b1fa2c93cb9 SHA-1: 58ce9f77155d4d3fe3e3a34c9279c54015d3ff8e SHA-256: 5f899d6ba79a78bc6e85428be8ba9150ce5bdad6dc475b35c61156ff8f21550d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the Document_Open and OLE_VBA_PCODE_AUTOEXEC_EXEC heuristics. The macro utilizes CreateObject, a common technique for executing arbitrary code, suggesting it's designed to download and execute a secondary payload. ClamAV detection as 'Doc.Downloader.Logan-9781905-0' further supports its malicious nature as a downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Logan-9781905-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Logan-9781905-0
  • 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
e27d29142f52c9bbf22d80d41e42b63f47a37f20e4370d5fd51155547914517e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22921 bytes

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