Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 b8ef91f8b90fa4e8…

MALICIOUS

Office (OLE) / .DOCX

288.3 KB Created: 2020-10-29 11:27:00 Authoring application: Microsoft Office Word
MD5: b3957f6d6c57a4137aa7920c11d0c15c SHA-1: b870f9ebb3677cda9694138cb9f828a297b03a28 SHA-256: b8ef91f8b90fa4e86f71f62b7e1ef24490eccaf4fe91a33b6f9aba24b1190cd4
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 identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02224-9938637-0', indicating it functions as a downloader. Critical heuristics confirm the presence of VBA macros, specifically a Document_Open auto-exec macro that utilizes CreateObject, strongly suggesting it's designed to run malicious code upon opening. The extracted artifact 'macros.bas' is the source of these macros. The document body content is unreadable and likely obfuscated or irrelevant, but the macro behavior points to a downloader, consistent with Emotet's typical delivery methods.

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
898dac0a9fbba39aaf7a14ff7100c80bc81af6e0cb0f2cf6d397c84d46877d50		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18710 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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