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

Static analysis result for SHA-256 15c49ec4dc917425…

MALICIOUS

Office (OLE) / .DOCX

179.4 KB Created: 2020-09-18 08:59:00 Authoring application: Microsoft Office Word
MD5: d454c36bdcf5215ef9aeeab71dc4edf5 SHA-1: fe40b17a163bb9b3190e4eb898694a3567d7c679 SHA-256: 15c49ec4dc917425fbbe700b8f340f1d1629be55957693427600488b42eb5156
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a Microsoft Word document containing a malicious VBA macro. The 'Document_open' macro is present and utilizes 'CreateObject', indicating an attempt to execute code. The ClamAV heuristic also flags it as a downloader. The VBA script is heavily obfuscated, but the presence of the Document_open macro and CreateObject call strongly suggests it is designed to download and execute a secondary payload, fitting the pattern of a malicious attachment.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763419-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763419-0
  • 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
2cacffa870bc163e0d80063dbad890b2628b581c624e40730ba57a6c44f2b3d2		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20834 bytes

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