Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 f4879ddade86aedc…

MALICIOUS

Office (OLE) / .DOCX

171.2 KB Created: 2020-10-02 08:05:00 Authoring application: Microsoft Office Word
MD5: d69b129aefd8841202ca3c76efa60d8a SHA-1: 7489aac858e8b383d2344de04fa38bbca7edf7bb SHA-256: f4879ddade86aedc39294917c0f5ccbb46207f67f447edffc13b02adee1a3361
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file was detected by ClamAV as Doc.Downloader.EmotetRed02224-9938637-0, indicating a downloader for the Emotet family. Heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject, a common technique for executing malicious code. The embedded URL, though benign in reputation, is likely part of the obfuscated delivery mechanism. The primary function of the VBA script is to download and execute a second-stage payload.

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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