Emotet Office (OLE) / .DOC malware analysis — malicious · 8ef853df2f6e1f34

MALICIOUS

Office (OLE) / .DOC

151.5 KB Created: 2020-09-14 20:00:00 Authoring application: Microsoft Office Word

MD5: 31adfc71666b14b1c8a3260b4b8260b9 SHA-1: 3450a341ce6dc4191b8e6c6779a00ea1ef535e93 SHA-256: 8ef853df2f6e1f34b1edaf59de47855922e5e0f5032b155b476d81f3d0a8dac0

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is a malicious Microsoft Word document containing VBA macros. A critical heuristic identified an obfuscated PowerShell stager within a hidden UserForm, specifically using an EncodedCommand. The Document_Open macro is present and utilizes CreateObject, indicating an auto-execution attempt. The ClamAV signature 'Doc.Malware.Emotet-9762672-0' strongly suggests the Emotet family. The PowerShell stager likely downloads and executes a second-stage payload, a common Emotet delivery technique.

Heuristics 8

Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL

OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
ClamAV: Doc.Malware.Emotet-9762672-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9762672-0
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` `c7305ccc26d392bb87c692b42d2d6bc38b982a0e4da883514cef9164df30503f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18576 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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