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

Static analysis result for SHA-256 c82c3dc7341a1492…

MALICIOUS

Office (OLE) / .DOCX

193.4 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word
MD5: 81e3aaf258c2912afb2eafe19104a1e4 SHA-1: 726e701e3204db94ddeffd4dbc30e75ab12b3c8c SHA-256: c82c3dc7341a149248f768f8f7da5e9f1ca7dcd9f2d1cd61a56386cfef07ff7b
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute code upon opening. The ClamAV detection as 'Doc.Downloader.Generic' strongly suggests its purpose is to download and execute a second-stage payload. The presence of the 'macros.bas' artifact further supports this analysis.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
  • 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
ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20213 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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