Emotet Office (OLE) / .DOCX malware analysis — malicious · 2a383eeb24d148e1

MALICIOUS

Office (OLE) / .DOCX

197.2 KB Created: 2020-09-24 13:34:00 Authoring application: Microsoft Office Word

MD5: 682d861b6af066438acc5adf774597d5 SHA-1: 4358c3a5c905da564c487cbf6025ebfa1822c277 SHA-256: 2a383eeb24d148e1343c8ac61522fdc8b79c8fe8c0f5f1079009ca43cfed93bf

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

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 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firing, suggests the macro is designed to run automatically upon opening the document. The document body contains heavily obfuscated text that appears to be PowerShell commands, likely intended to download and execute a secondary payload. This aligns with the known behavior of Emotet droppers.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
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` `a837a74c15cb3b2b06d70805c30f06a3d350fde6faccbab7be73edc42a69bb80`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25402 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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