Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 dc5ca596e8b79ce0…

MALICIOUS

Office (OLE) / .DOCX

161.2 KB Created: 2021-01-04 16:15:00 Authoring application: Microsoft Office Word
MD5: 23e2a198713324a7fff86daa24276b65 SHA-1: 8810e1ab3615e962d6e66f5d8b0af81b90f45d90 SHA-256: dc5ca596e8b79ce0402bc63258f8494a2e836700dedb32153708f7bc711e3fb4
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file contains VBA macros, specifically a Document_Open auto-exec macro, which is a common technique for initial execution. The ClamAV detection and heuristic firings strongly suggest this is a downloader for the Emotet family. The macro likely uses CreateObject to download and execute a secondary payload, as indicated by the 'OLE_VBA_CREATEOBJ' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
b7c08445609ad3b9c2a0766b1423df26453c524cbf6c8eca0da53a1732c00612		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 7252 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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