Emotet Office (OLE) / .DOCX malware analysis — malicious · ac227d3a7a5726f8

MALICIOUS

Office (OLE) / .DOCX

142.8 KB Created: 2020-09-29 09:08:00 Authoring application: Microsoft Office Word

MD5: b0c8c0d11e09bbae3f388e5e67685a02 SHA-1: edecaa29db8769544f76369237a7308b975b91f2 SHA-256: ac227d3a7a5726f8481ab18b06d8afab6c1d4f31572578a71f4375020fa715c1

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

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 VBA macros in the 'macros.bas' file, combined with the auto-execution firing, suggests the document is designed to run code immediately upon opening. This code likely downloads and executes a second-stage payload, a common Emotet tactic. The document body's obfuscated nature further supports this, as it appears to be encoded or encrypted content rather than user-readable text.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9769137-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9769137-0
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` `2f5b3223d32b6b79c027453efef3c5410c27df5205b9cb2b32dd9a1e0304e007`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8132 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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