Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 0e9e563811734aad…

MALICIOUS

Office (OLE)

123.0 KB Created: 2018-10-02 21:46:00 Authoring application: Microsoft Office Word First seen: 2019-02-04
MD5: 5fe2f895d52aab6aa332775a1f2fbc8e SHA-1: 3a3cf660f437e3661baeafb619c7c2e9e3fffa00 SHA-256: 0e9e563811734aad74063bb94bdcd39ae07b38f20a063a713be8e00b8c5f68db
124 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-6826541-0. Heuristics indicate the presence of an auto-executing VBA macro (AutoOpen) that uses Shell execution, a common technique for Emotet to download and execute further stages. Although VBA extraction failed, the presence of legacy WordBasic auto-exec markers and p-code execution strongly suggests malicious intent.

Heuristics 5

  • ClamAV: Doc.Downloader.Emotet-6826541-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6826541-0
  • 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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 In document text (OLE body)

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