Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 2d158b82266fb598…

MALICIOUS

Office (OLE) / .DOCX

171.9 KB Created: 2020-09-30 10:55:00 Authoring application: Microsoft Office Word
MD5: 12ad6894a95551b426a635631294e2a9 SHA-1: 63bfc335d5b7f689435e8b92b79d583c61024f8b SHA-256: 2d158b82266fb5987ab0649eb0377da2ef6a3520af76e1096e6e8f48a714085d
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, including auto-execution via Document_Open and CreateObject calls, strongly indicate a malicious downloader. The presence of VBA macros, specifically an auto-executing Document_Open macro that uses CreateObject, is characteristic of Emotet's delivery mechanism. The obfuscated document body content and the ClamAV signature further support this attribution. The primary function appears to be downloading and executing 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
e574dc9e5be70b9e64389cc5809b4b9a70fc86bbb2ebeadb9aa3663111f6add5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10540 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 28 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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