Emotet Office (OLE) / .DOCX malware analysis — malicious · 762e5ac3246051e7

MALICIOUS

Office (OLE) / .DOCX

230.8 KB Created: 2020-08-14 13:39:00 Authoring application: Microsoft Office Word

MD5: f8382e43094b97f096c8e2331689b276 SHA-1: 4bcd1bf781e16ae49732f7032488894abe4827b4 SHA-256: 762e5ac3246051e7afe65aaf7244a1a9bc0ede9fdc1be60e433b6b7aeeb27bd0

262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros with a Document_Open auto-execution macro, which is a common technique for Emotet. Critical heuristics indicate a hidden UserForm command stager, suggesting the macro's primary purpose is to download and execute a secondary payload. ClamAV detection further supports the Emotet family attribution.

Heuristics 7

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
ClamAV: Doc.Downloader.Emotet-9321492-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9321492-0
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.
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` `865c37ae518b467a18f7f7cfd8ac4fb8e2c74b2d36657a71cf7fdd09ff330211`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8121 bytes

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