Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 d8163bd05fc8f2e0…

MALICIOUS

Office (OLE) / .DOCX

171.8 KB Created: 2020-10-02 08:05:00 Authoring application: Microsoft Office Word
MD5: 441996bf04fc582944d85a1d94e82ff6 SHA-1: 00497ad229c0a6f588933cd4c8c7de492ec4b517 SHA-256: d8163bd05fc8f2e0d12726c560783954cd30606b9beb40bc0869d23e90817245
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

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 code designed to execute automatically upon opening the document. The presence of VBA macros and the specific ClamAV signature point towards the Emotet family, which commonly uses this delivery method to download further payloads. The obfuscated nature of the VBA code, as noted by the EXTRACTED_FILE_STATIC_TRIAGE heuristic, is typical for Emotet to evade detection.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
7051a023ff8c92545e9437031d326fa9393a821a4be28f0566a57a8f3610dd93		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10600 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 53 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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