Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 fbef2a146f9473c0…

MALICIOUS

Office (OLE) / .DOCX

169.3 KB Created: 2020-09-22 22:50:00 Authoring application: Microsoft Office Word
MD5: f5b18c4a12c28bf597933a7a56ceb1f4 SHA-1: 6f1732bba34c825bb3749bcb72760c4c0d8d3543 SHA-256: fbef2a146f9473c053460e799da175fe08ab1827d046e823a7b4be3cb71e0e94
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9765458-0', strongly indicating the Emotet family. Static analysis reveals the presence of a 'Document_Open' VBA macro that utilizes 'CreateObject' and 'GetObject' calls, typical for Emotet's downloader functionality. The macro is designed to execute automatically upon opening the document, likely to download and run a second-stage payload. The presence of the 'macros.bas' file further supports this analysis.

Heuristics 8

  • ClamAV: Doc.Downloader.Emotet-9765458-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765458-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
30f2d5537902d59450c9d0d4b8e76203b657840da56dd9d07c3c9632425ddcf4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20571 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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