Emotet Office (OLE) / .DOCX malware analysis — malicious · caf29a4582381903

MALICIOUS

Office (OLE) / .DOCX

189.3 KB Created: 2020-09-29 13:18:00 Authoring application: Microsoft Office Word

MD5: af4400acdad8dded972c9f57f291547e SHA-1: 3c8edd3f9edb992fe65eb0dbaf40265f7b5cdfe9 SHA-256: caf29a4582381903da75e44b0f49b541a32d7ad9a08db356c0bf6d0873c479f0

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a VBA macro in the 'macros.bas' file, combined with the auto-execution trigger, suggests the script is designed to run automatically when the document is opened. This is characteristic of Emotet's delivery mechanism, which often involves macro-enabled documents to download and execute further stages of malware. The document body's obfuscated text does not provide direct clues to the lure, but the technical indicators are sufficient for a high-confidence assessment.

Heuristics 7

ClamAV: Doc.Malware.Emotet-9769343-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9769343-0
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.

Filename	Kind	Source	Size
`macros.bas` `3466a25e0ec8edf0a3d6ff61e66e8183246c716be04ca7cccaa39032367b5dbf`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10303 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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