Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 351bc2d545540f78…

MALICIOUS

Office (OLE) / .DOCX

196.0 KB Created: 2020-10-21 19:03:00 Authoring application: Microsoft Office Word
MD5: c74639171ca1986005e569432270d5e6 SHA-1: c78a0dbb5b5ae28dad7eae1936dc279a30b0c65a SHA-256: 351bc2d545540f7803343ed6b60942a6a96d7bf0524c30abbba917f25467fb99
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

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 named 'macros.bas' and the detection signature 'Doc.Dropper.EmotetiBlueUpdate1020-9780531-0' point towards Emotet, a known downloader family. The macro likely executes a second-stage payload, consistent with Emotet's typical behavior.

Heuristics 7

  • ClamAV: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0
  • 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
02a7c690f255f801ffb6158001004b72bc87e4e321bdb1878af07b39dba6d71b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23233 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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