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

Static analysis result for SHA-256 81f0521a22118d4b…

MALICIOUS

Office (OLE) / .DOCX

216.7 KB Created: 2020-09-21 20:39:00 Authoring application: Microsoft Office Word
MD5: eb85d5a44216716b805e245b3915da79 SHA-1: 152ce93678375b951d5b08186beb5397117b7adb SHA-256: 81f0521a22118d4b0d1ab491183c0e961d22f56fb43d063febfdbf53348add1f
242 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for malware delivery. The script uses CreateObject and GetObject calls, indicating an attempt to manipulate the system or download additional content. The ClamAV detection as 'Doc.Downloader.Generic' further supports the downloader functionality. No specific URLs or executable payloads were directly extracted, but the presence of macros and the downloader heuristic strongly suggest malicious intent.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764666-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764666-0
  • 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
6d2f50f334b8e082813c694e310720d341c184a4af51360bc43b61318b8ab2c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19051 bytes

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