Emotet Office (OLE) / .DOCX malware analysis — malicious · 41e163d85fdd54b5

MALICIOUS

Office (OLE) / .DOCX

150.7 KB Created: 2020-09-29 07:27:00 Authoring application: Microsoft Office Word

MD5: 244e6997dc3c8597fec480efc1f8e040 SHA-1: 13566904c99a96c74426423dd29f28127ccb2fd9 SHA-256: 41e163d85fdd54b56a26d8ad9df6c258431dbf5584a1515b5050eba93037416a

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

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 auto-execution, suggests the document is designed to run code upon opening. This code likely functions as a downloader for further malicious payloads, consistent with Emotet's known behavior. The embedded URL, though benign according to reputation, is listed as an IOC due to its presence in the document.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9769096-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9769096-0
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` `7fe684c304685628252d7c0111d3e33f34436ae7810b3dde5f2aa07edc7bb621`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8166 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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