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

Static analysis result for SHA-256 74128ae53e560f05…

MALICIOUS

Office (OLE) / .DOCX

176.8 KB Created: 2020-09-28 12:01:00 Authoring application: Microsoft Office Word
MD5: e3c1d8079f13c6c5046d97e6716a1735 SHA-1: 51ed55055b17a163da4cecc639eb9ab51dfb001f SHA-256: 74128ae53e560f059f07dd845d36fa598ed216139c2c4a95cdfbd4b1677541c7
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro that uses CreateObject, indicating an attempt to execute code upon opening. The ClamAV heuristic also flags it as a downloader. While the VBA code is heavily obfuscated, its presence and the heuristic firings strongly suggest it's designed to download and execute a secondary payload. No specific family could be identified due to the obfuscation.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9768640-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9768640-0
  • 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
41d5da1c3b5ac37936783dc0f6deb9a466b44f4833e7f3cfb69b25cedc4e48ca		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6262 bytes

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