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

Static analysis result for SHA-256 7bf5865edd1cf7fb…

MALICIOUS

Office (OLE) / .DOCX

178.5 KB Created: 2020-10-22 15:17:00 Authoring application: Microsoft Office Word
MD5: 1a1122ad4ab9baa5f8db1a2d51a3c0d7 SHA-1: eea3b7be6346608155b0257ee0e934e13a655475 SHA-256: 7bf5865edd1cf7fbc77de4691736ab60bb0d5163db0f3153bb804de1d88953fe
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. The ClamAV detection 'Doc.Downloader.Logan-9781905-0' strongly suggests a downloader functionality. The VBA script concatenates strings to form what appears to be a URL, likely for downloading a second-stage payload. The embedded URL, though marked as benign, is included as an IOC.

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
cecccb4a1113767f9883636c8aa1a2de57ced4949da2d8bcaf50534e5e598b34		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18857 bytes

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