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

Static analysis result for SHA-256 0fd9467a563a5545…

MALICIOUS

Office (OLE) / .DOCX

161.8 KB Created: 2020-09-23 12:48:00 Authoring application: Microsoft Office Word
MD5: bb085eb8124e81bfcdaa40cb988c3e19 SHA-1: 4b71dfdbded22c8215ac92dc1e1126cd051a174c SHA-256: 0fd9467a563a55456d7e436136bd7ae1a3ae46cb256c38fdb933511167ee8e68
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate

The file contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute code upon opening. The macro code is heavily obfuscated, making its exact function difficult to determine, but it is highly likely designed to download and execute a secondary payload. The ClamAV detection as 'Doc.Downloader.Generic' further supports this assessment.

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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