Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 4a1ea7affcba0788…

MALICIOUS

Office (OLE) / .DOC

97.0 KB Created: 2021-11-24 10:11:00 Authoring application: Microsoft Office Word
MD5: 50323d390f1f9f805ebd39793f59056b SHA-1: 11a34f2935f700dd5669a450868c47a71de3d510 SHA-256: 4a1ea7affcba0788556ae5bd402178b65274dc2b8f1b7aea7b7813d9cc4346e5
222 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1059.003 Command and Scripting Interpreter: Windows Command Shell

The sample contains VBA macros that automatically execute upon opening the document. The macro uses the Shell() function to download and execute a second-stage payload from multiple URLs. The reconstructed URL for the payload download is "C:\ProgramData\gtdyyu.b". The ClamAV detection name "Doc.Downloader.EmotetRedDawn11210-9912807-0" strongly suggests the Emotet family.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Downloader.EmotetRedDawn11210-9912807-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRedDawn11210-9912807-0
  • 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
a5203eb4f0f18e2248d0e904ff0f109ac5c5e033e05fd9e52b610aaf0119dcd4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3641 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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