Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 8605cf9b95f0dc0e…

MALICIOUS

Office (OLE)

137.6 KB Created: 2020-10-15 11:05:00 Authoring application: Microsoft Office Word
MD5: 591d455158b28daac39befb30e498960 SHA-1: 90cae254e8caef33399005cf63f4ba33506ace23 SHA-256: 8605cf9b95f0dc0e1b0f7c83b3c4f3c5c7a0bfc94bd3a88544e5fb984b2d3cb1
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS, OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC strongly indicate malicious VBA macro activity. The presence of a Document_Open macro that uses CreateObject suggests the execution of a downloader. The ClamAV signature 'Doc.Downloader.Emotet-9778182-0' directly attributes this to the Emotet family. The document body content is heavily obfuscated and unreadable, but the VBA macro's auto-execution and CreateObject usage are clear indicators of a downloader's intent.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9778182-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778182-0
  • 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
667d1f77cb408aaf823307ab93a2ae09bd6e06443d8c9883c654cd93c2502ebe		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11222 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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