Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 c3caf9f914df7b8d…

MALICIOUS

Office (OLE) / .DOC

199.0 KB Created: 2020-10-21 13:40:00 Authoring application: Microsoft Office Word
MD5: af91787f6597771d0be4acdd9a26eeb2 SHA-1: b1112128cdfc5a14bda51b2f8a0c68e2c0067bc9 SHA-256: c3caf9f914df7b8d90ac3dd35fd1ad24ec34a4d1af94293e9002a9f8f943703e
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 OLE document containing VBA macros, specifically triggering a Document_Open macro that uses CreateObject. This is indicative of a dropper functionality, as confirmed by ClamAV's detection of 'Doc.Dropper.EmotetiBlueUpdate1020'. The presence of the 'macros.bas' artifact further supports the macro-based execution. The primary function appears to be the execution of embedded VBA code, which likely downloads and executes a secondary 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
95eb3c5d035a5c49033717199bc50764986e3b5ab99bba0bc56e259ec5a3061f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23248 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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