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

Static analysis result for SHA-256 77b767b8c013f995…

MALICIOUS

Office (OLE) / .DOCX

215.2 KB Created: 2020-09-21 07:35:00 Authoring application: Microsoft Office Word
MD5: d7ad6b1c30eb8f2b59b226c5aa267de5 SHA-1: 13d0453585c895f17754368878c0f04b94a1ed9f SHA-256: 77b767b8c013f9955505e5c6cc426678500419b6c046a0ab44258977f798cac6
242 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 is designed to execute code. The presence of CreateObject and GetObject calls, along with the ClamAV detection of 'Doc.Downloader.Generic', strongly suggests that this macro is intended to download and execute a second-stage payload. The macro itself is heavily obfuscated, making it difficult to determine the exact download URL or execution method.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764473-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764473-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
a72546be4835befa0cd5934bb3d180228dbaffbae6f31f70f11c03f05171f092		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19249 bytes

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