Emotet Office (OLE) / .DOCX malware analysis — malicious · a087c45b5ed8a1c9

MALICIOUS

Office (OLE) / .DOCX

200.0 KB Created: 2020-10-21 21:54:00 Authoring application: Microsoft Office Word

MD5: f0d5d28e6dc1e5474fe95c6324b0b309 SHA-1: 2202fda0f9a33614d346a1124ef7997a5967d4d7 SHA-256: a087c45b5ed8a1c9d91f0b920d6f2510bd5d82d3813af9653757607709da9d87

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment 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 firing, suggests the macro is designed to run automatically when the document is opened. This is consistent with Emotet's typical behavior of downloading and executing additional malware. The document body content is heavily obfuscated and unreadable, providing no direct clues to the 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` `6c391991df0deaab71158b56a42728fa6cc0fa0f9cdacd00457125ab6d1e3e9d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	23148 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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