Emotet Office (OLE) / .DOCX malware analysis — malicious · e832702bcd4a1bc5

MALICIOUS

Office (OLE) / .DOCX

192.3 KB Created: 2020-12-21 21:21:00 Authoring application: Microsoft Office Word

MD5: af55f09521556c3ea189612dd785f570 SHA-1: ee2f4a227866762f2d3a5a8ce77b847b62017382 SHA-256: e832702bcd4a1bc593af89baf3e22083205d412a049797b164db2d6177678325

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 a downloader. 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 execute automatically upon opening the document. The document body, though heavily obfuscated, contains strings that appear to be part of a lure to open the file, likely to trigger the malicious macro. This macro is likely responsible for downloading and executing a second-stage payload.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-10024800-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-10024800-0
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` `8aae0e70694468f75c3b71f11fefc9e062894c6e53b1f2a4dd3530766c509e7d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10278 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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