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

Static analysis result for SHA-256 b132349663cec003…

MALICIOUS

Office (OLE) / .DOCX

160.9 KB Created: 2020-09-23 12:48:00 Authoring application: Microsoft Office Word
MD5: 72fe221687ef73f4a75948e41c0b1632 SHA-1: 62693be6ae0f1d27ad68e018d852cb322bdaab7a SHA-256: b132349663cec0033708f8e580e0b545cd5b296cd22dd96de246e974253b14b9
240 Risk Score

Malware Insights

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

The file contains VBA macros, specifically a Document_Open macro that is configured to execute automatically. The heuristic firings indicate the use of CreateObject and p-code auto-execution, suggesting the macro is designed to perform malicious actions. The ClamAV detection as 'Doc.Downloader.Generic' further supports that this document is intended to download and execute additional malware. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 7

  • 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.
  • 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
b40b6439e0e94acfcf6292a727f89f3b7b0e2a6faeddd230541e1164d0603753		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19346 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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