Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 f40af59b5ecd3e1a…

MALICIOUS

Office (OLE) / .DOCX

163.9 KB Created: 2020-10-01 15:57:00 Authoring application: Microsoft Office Word
MD5: 843141e4267d9152af9286c2c09c78df SHA-1: f535c7353ca5878d336e0ab6da0a6963fb76515d SHA-256: f40af59b5ecd3e1af3aae5ff273fe3d309fd88828377c350c789222a4a5cf35e
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a critical ClamAV detection for Emotet, along with high-severity heuristics indicating the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject. This strongly suggests the document is designed to run malicious code upon opening. The presence of the 'macros.bas' file and the Emotet detection name further support this. The obfuscated document body text is not directly indicative of the attack pattern but is consistent with malicious documents.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9770197-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9770197-0
  • 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
34626713db5720b3147c8823fb8dfd0fe34a12fce4df5a0aa65f24e3eab9d078		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10368 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 53 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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