Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 a87705e522dc57d7…

MALICIOUS

Office (OLE) / .DOCX

164.3 KB Created: 2020-10-01 15:57:00 Authoring application: Microsoft Office Word
MD5: a8b5f2a5977108d355e2c871e97356d8 SHA-1: 37bbdc5ed220a1b7c4a5f166fbdafa38d4c04b1b SHA-256: a87705e522dc57d703fd4d90ad62e5d52eb15947e6a04c11f3602342e183ecd3
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious DOCX file containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. ClamAV identifies it as Emotet. The presence of VBA macros, auto-execution upon opening, and the use of CreateObject strongly indicate a downloader or droppper functionality. The obfuscated document body text does not provide clear user-facing content, but the technical indicators point to a malicious macro execution.

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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