Emotet Office (OLE) / .DOCX malware analysis — malicious · ae384ef3ae1439be

MALICIOUS

Office (OLE) / .DOCX

181.5 KB Created: 2020-10-27 15:55:00 Authoring application: Microsoft Office Word

MD5: 211609e875590136ab7269db7a2673f9 SHA-1: 067495d936ee0a1794775b3c958842f9707670ed SHA-256: ae384ef3ae1439be7fd5e225e356f5869d208e2bde0bce02a81e75d56239d985

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

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 of Document_Open, suggests the document is designed to run code upon opening. This code likely downloads and executes a second-stage payload, consistent with Emotet's known behavior. The document body text appears to be heavily obfuscated or corrupted, providing no direct clues to the lure.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9784225-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9784225-0
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` `041f40187eb07e2256edf903ca2aa818eaff7dc6fcfd4bf44314c9f8902df953`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16848 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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