Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 fc4e851464b275cb…

MALICIOUS

Office (OLE)

133.2 KB Created: 2020-10-14 19:03:00 Authoring application: Microsoft Office Word
MD5: 986be2ff6db6d985f4b6d7d09f93086c SHA-1: f01ced7620f30b0feb7c47a45a2644d9d0db9115 SHA-256: fc4e851464b275cb4206af8ce176350c7e12b7b1334a795cf27e48bb6cd9df06
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a VBA macro, identified as macros.bas, further supports this. The ClamAV signature "Doc.Downloader.Emotet-9778091-0" directly attributes this file to the Emotet family, known for its downloader capabilities. The document body appears to be heavily obfuscated, likely to hide its true purpose, but the macro firings are sufficient to determine its function as a downloader.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9778091-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778091-0
  • 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
35ba581a7d07c242723817cd679240b29046cc2a7f4485862374591738596dda		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9454 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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