Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 37bd220442163f58…

MALICIOUS

Office (OLE) / .DOC

161.6 KB Created: 2020-09-15 23:02:00 Authoring application: Microsoft Office Word
MD5: 49fe9dacbeca1b68cfcb9c045257d4b9 SHA-1: b4e6a8df14bc878c17dee32f1027e7b680b2f37b SHA-256: 37bd220442163f58f5d6619fc20b11f1d515eb0197585bec92e8911e1f5d2c6d
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject to execute a PowerShell command. This command downloads and executes a script from the reconstructed URL 'http://185.173.172.172/a.ps1'. The ClamAV detection and heuristic firings strongly indicate this is an Emotet downloader.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9762287-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9762287-0
  • 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
2463ca5944a3498304fe918280f5b6583e6e8da36e1a3b40714097a3ead5b81e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25024 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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