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

Static analysis result for SHA-256 0a9fba1104c5690a…

MALICIOUS

Office (OLE) / .DOCX

161.7 KB Created: 2020-09-23 12:48:00 Authoring application: Microsoft Office Word
MD5: 488e67e8a2d0ae4f8cb07e13fce458ed SHA-1: cf6ad120486d5588a294d498fb347368251c4400 SHA-256: 0a9fba1104c5690ac609faf1d3e0e67d22cb7b1545a4577d1118c9c93782ceee
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a Microsoft Word document containing VBA macros, specifically a Document_Open macro that uses CreateObject. This indicates an attempt to execute code automatically when the document is opened. The ClamAV heuristic also flags it as a downloader. While the VBA code is heavily obfuscated, the presence of these indicators strongly suggests the document is designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9765533-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9765533-0
  • 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
b40b6439e0e94acfcf6292a727f89f3b7b0e2a6faeddd230541e1164d0603753		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19346 bytes

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