Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 9aa0fa1f9f8a8d89…

MALICIOUS

Office (OLE) / .DOCX

154.8 KB Created: 2020-12-28 15:43:00 Authoring application: Microsoft Office Word
MD5: a837f5490eeb1449ed3ef4b02be38089 SHA-1: 365c9889ba03d9d55e005ad84503ba8060ff8dc1 SHA-256: 9aa0fa1f9f8a8d893f52f03c75003a7ae802a7b85cddfc07aee1fcb21bb2da0b
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open auto-exec macro, which is a strong indicator of malicious intent. The heuristic firings suggest the macro uses CreateObject to download and execute a second-stage payload. The ClamAV detection explicitly names this as an Emotet downloader variant. The document body, though heavily obfuscated, contains patterns consistent with lures for enabling macros, often related to password protection or archive extraction.

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
a004a96685dc375590aeec65acf06fce9e74ef2bbe0aa7a48bc315f9645e3700		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6009 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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