Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 b3e3aa1c634c56cc…

MALICIOUS

Office (OLE) / .DOCX

191.5 KB Created: 2020-10-01 23:03:00 Authoring application: Microsoft Office Word
MD5: f9dfb6818883bdd938dc96afef17a715 SHA-1: 97e3b47d925f22e0880cb9b18dded3ee831b82f0 SHA-256: b3e3aa1c634c56cc979189e670b2a4579c4673e47250b10098d56c0a83b54e06
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02224-9938637-0'. Static analysis reveals the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute code upon opening. The heuristics suggest obfuscation techniques within the VBA code, common in downloader malware. The primary function appears to be downloading and executing a secondary payload, consistent with Emotet's behavior.

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
6e0386e028be270039c4fe002fdf7015e999e4b27f1ccfca8c4209474f6ee6f3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10412 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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