Emotet Office (OLE) / .DOCX malware analysis — malicious · 4a7901893dcc2cec

MALICIOUS

Office (OLE) / .DOCX

162.9 KB Created: 2020-09-25 11:29:00 Authoring application: Microsoft Office Word

MD5: 5e1271db204bafee61b82755521d6473 SHA-1: 1788ee9bca9a18cf7bd332ba916b5f32feda2df3 SHA-256: 4a7901893dcc2cec43f13ed479f293fcacb03da7c026ba58afef501a2c8bb80d

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. The ClamAV detection and heuristic firings strongly indicate this is an Emotet downloader. The obfuscated document body text appears to be an attempt to disguise the malicious PowerShell execution. The primary IOC is the embedded macros.bas file.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9767804-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9767804-1
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` `426aca538f654441d66e245a00bfc928dacf37832bbf946df52799fa3650ecb1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	24489 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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