Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 a498490c2d208241…

MALICIOUS

Office (OLE) / .DOCX

161.4 KB Created: 2020-09-24 23:07:00 Authoring application: Microsoft Office Word
MD5: e70ae7c2c39ed2f187435842f373ef5f SHA-1: 76d708b74fb40a10b8e0f1dc51046b3c5c51f945 SHA-256: a498490c2d2082417852e61a598fa2606f70d6a8fd7fd5f6ae72ac00b1276126
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file contains a Document_Open VBA macro that triggers on opening the document. This macro utilizes CreateObject to execute obfuscated PowerShell commands. The ClamAV detection and heuristic firings strongly indicate this is an Emotet downloader. The obfuscated PowerShell is designed to download and execute a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9765780-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765780-0
  • 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
822ca2bb5afccdd585dd9d4b3c04999cc0b411b7c4b99b6e373f1239fc1c4ef1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 26832 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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