Emotet Office (OLE) / .DOCX malware analysis — malicious · bebca256f7d7dea8

MALICIOUS

Office (OLE) / .DOCX

180.5 KB Created: 2020-10-21 10:22:00 Authoring application: Microsoft Office Word

MD5: a37b5548030109711153ab9f810e326c SHA-1: cdfaab4e336820368e0a3b683f2d964d2aa9b4ba SHA-256: bebca256f7d7dea851ea48ddd84315c2ad2a86e2b9e2379ee74feedfbf513e95

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, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate a malicious dropper. The presence of a VBA macro in the macros.bas file, combined with the auto-execution of Document_Open, suggests the macro is designed to run automatically upon opening the document. This macro likely downloads and executes a second-stage payload, as indicated by the 'Doc.Dropper' classification. The document body content is heavily obfuscated and does not provide direct clues to the user-facing lure.

Heuristics 7

ClamAV: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0
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` `2d652a5f62c7cd7db265ab6f01298582724932c4485a1fde21ad075960ba4c72`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20722 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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