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

Static analysis result for SHA-256 6e9c088cbe83fb2b…

MALICIOUS

Office (OLE) / .DOCX

240.2 KB Created: 2020-10-29 04:25:00 Authoring application: Microsoft Office Word
MD5: 9c639b38bb880454609b9fc95dccfd05 SHA-1: a87be03fae942b62075ff19e71089462ae9e1210 SHA-256: 6e9c088cbe83fb2b0f6c959df9f72eb6faa3316c7eaf8e1690f590a91e56974f
202 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute obfuscated code. This behavior is indicative of a downloader, as suggested by the ClamAV detection 'Doc.Downloader.Generic-9785156-0'. The VBA code appears to be heavily obfuscated, making it difficult to determine the exact payload or destination URL without further dynamic analysis. The presence of macros and the execution of code via CreateObject strongly suggest an attempt to download and run a secondary malicious component.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • 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
6946a447d4e81b55f46842d89fcb86ebdb7dd8c4ce560afbdde9533734f99d67		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18622 bytes

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