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

Static analysis result for SHA-256 b1bc33186fb8cfcd…

MALICIOUS

Office (OLE) / .DOCX

218.4 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word
MD5: ae308cf393cd5dc7ab901765759e5dd6 SHA-1: adf7862ed52cb67040fb25a6941b40d7e95d1335 SHA-256: b1bc33186fb8cfcd82b5c2472804eb7ef43ae164d2879c71d0c38ddc5f9ecf61
240 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing a malicious VBA macro that executes automatically via the Document_Open event. The macro utilizes CreateObject and p-code auto-execution, indicating it's designed to download and execute a second-stage payload. ClamAV detection as 'Doc.Downloader.Generic-9785156-0' further supports this assessment. The document body content is heavily obfuscated and does not provide clear user-facing lures.

Heuristics 7

  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18870 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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