Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 1849ce13b6b85872…

MALICIOUS

Office (OLE) / .DOC

164.5 KB
MD5: 93cea8f01dc5dbb6cfd418959369cdee SHA-1: 3713470c686e2074a25748e3b91084a560528ee2 SHA-256: 1849ce13b6b8587273a6ba9558bd63b59ccef9a7c8b25c01c14253a34da481c6
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains a critical heuristic firing for an obfuscated auto-exec VBA loader, specifically a Document_Open macro that uses CreateObject and Shell execution. ClamAV detection confirms this as Emotet. The VBA script is heavily obfuscated but the presence of Document_Open and CreateObject calls strongly suggests it's designed to download and execute a secondary payload, a common Emotet tactic.

Heuristics 7

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Downloader.EmotetRed0121-9822961-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed0121-9822961-0
  • 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.
  • 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
70cde1a7768c914d768cc1a9e45a0e017daeffeaf31f2cd2ffc5285d23649526		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13216 bytes

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