Emotet Office (OLE) / .DOCX malware analysis — malicious · 2f61da248ac204ef

MALICIOUS

Office (OLE) / .DOCX

161.1 KB Created: 2020-09-24 23:07:00 Authoring application: Microsoft Office Word

MD5: 49944a5ec2f4e17aa625941ac2e6a3f1 SHA-1: c6f8143b91b4ef2393953ad4f778a7cac579161d SHA-256: 2f61da248ac204ef8f63a0bf142e3c4abd8b1269662f61675ac1351365311640

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

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 named 'macros.bas' and the detection of an embedded URL further support this. The document body, though heavily obfuscated, appears to contain encoded strings that likely form part of the PowerShell execution command. The primary function of the VBA macro is to execute a PowerShell command, likely to download and execute a secondary payload, which is characteristic of Emotet.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9765780-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9765780-0
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` `822ca2bb5afccdd585dd9d4b3c04999cc0b411b7c4b99b6e373f1239fc1c4ef1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	26832 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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