Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 a626a37df7cda5e1…

MALICIOUS

Office (OLE) / .DOCX

160.6 KB Created: 2020-09-24 14:59:00 Authoring application: Microsoft Office Word
MD5: 871e0e2c6bf7e02a24e0021c30c5eec1 SHA-1: de6d537426489b28a3bd0f5e0e12414a2ceaa7d8 SHA-256: a626a37df7cda5e19509dbf11e7da25dee10fccb13c11783d28879021ead0f7d
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a VBA macro in the 'macros.bas' file, coupled with the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firing, suggests the macro is designed to execute code. The document body, though heavily obfuscated, appears to contain fragments related to PowerShell execution, further supporting the malicious nature. The ClamAV signature 'Doc.Downloader.Emotet-9765780-0' directly attributes this sample to the Emotet family, known for its downloader capabilities.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9765780-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765780-0
  • 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
478e525c35da71173721eac25da86734da83f0768f80b277d373c9cc7716a5ba		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 27607 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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