Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 0033852da202c925…

MALICIOUS

Office (OLE) / .DOC

160.0 KB
MD5: 6765ac4205f17be3f0da4a58f13a825b SHA-1: 63ae40cb4487efbcf57d305edffcbd6365d7d704 SHA-256: 0033852da202c92547b4368a3c7e02dca4498ef8a22f6e5f5e59eb0c03b8d904
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains a heavily obfuscated VBA macro within the Document_open subroutine, which is designed to execute arbitrary code. Heuristics indicate the use of CreateObject and Shell execution, typical for downloading and running secondary payloads. ClamAV detection further confirms its malicious nature as a downloader, specifically identifying it as Emotet.

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
8a462910f65fc057e90c745908924da5be2f067f062e45a5cb003ffd787ee4a6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13488 bytes

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