Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 b7791efd3643b52b…

MALICIOUS

Office (OLE) / .DOCX

158.7 KB Created: 2021-01-12 14:56:00 Authoring application: Microsoft Office Word
MD5: 8206af441464d8d2d870c3b5c7818031 SHA-1: 63b8b9fd07ac04583a7be1e73ca1f87d8dc07c20 SHA-256: b7791efd3643b52b9aaf312054b9b2e3ce70b9fc88d0a0b9745419adb1b296a7
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.EmotetRed02224-9938637-0', indicating it functions as a downloader. High-severity heuristics confirm the presence of VBA macros, specifically a 'Document_Open' macro that utilizes 'CreateObject' and p-code execution, strongly suggesting it's designed to execute a secondary payload. The document body content is heavily obfuscated and unreadable, providing no direct clues to the lure, but the technical indicators are sufficient to attribute it to the Emotet family.

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
cd2cdccd599e42cfa9fbd13cb834d7d13272d1d23a56e4724093d32e3972c403		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 7306 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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