Emotet Office (OLE) / .DOCX malware analysis — malicious · b7fbea59163c0516

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 82fac97bff7ec0ba62df8e900f524d61 SHA-1: 205a0ac0ef13fc482ab3d5b7cd0d1a4a7c3939c6 SHA-256: b7fbea59163c0516df6ea88a2b31e39f6cd022c06831b16b067576a0f57a8e85

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 macros.bas, coupled with the auto-execution heuristic, suggests the script is designed to run automatically upon opening the document. This script likely downloads and executes a second-stage payload, consistent with Emotet's known behavior. The benign URL found is likely a red herring or part of the document's legitimate structure.

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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