Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 caf10b76dc340cf0…

MALICIOUS

Office (OLE) / .DOCX

196.0 KB Created: 2020-10-21 19:03:00 Authoring application: Microsoft Office Word
MD5: 29959fbf6ad341becae8d6921bb9a568 SHA-1: 6037fe1046ff1f72aaee9ad8a2995c0083609ecc SHA-256: caf10b76dc340cf0bb674ca1cd687301597708c9d9e9a23391490effab9d1cc2
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is a malicious DOCX document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. ClamAV identifies it as 'Doc.Dropper.EmotetiBlueUpdate1020-9780531-0', strongly suggesting it's a dropper for the Emotet family. The macro's auto-execution and CreateObject usage indicate it's designed to download and execute a second-stage payload.

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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