Emotet Office (OLE) / .DOCX malware analysis — malicious · 571d75eb43b04f84

MALICIOUS

Office (OLE) / .DOCX

179.0 KB Created: 2020-10-26 12:50:00 Authoring application: Microsoft Office Word

MD5: a68fe8c09efd9c5c27149c82726943a1 SHA-1: 000e2844decf1fb0357fb97e25f3f8bcfe56b062 SHA-256: 571d75eb43b04f84e16bed8684197b40bc82b1fa348c5f9b23f8d1cb5d3550f1

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 malicious intent. The presence of a VBA macro in 'macros.bas' further supports this. The ClamAV signature 'Doc.Downloader.Emotet-9784039-0' directly attributes this sample to the Emotet family, which is known for its downloader capabilities. The document body, though heavily obfuscated, contains patterns consistent with macro execution. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9784039-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9784039-0
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` `f1dc9112e8c9da061a4c5323ee9b2ea6b91271f7826b740d7f08af4c09fa4698`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15863 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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