Emotet Office (OLE) / .DOC malware analysis — malicious · 0cdd227e8a640ed0

MALICIOUS

Office (OLE) / .DOC

266.2 KB Created: 2020-02-06 19:16:00 Authoring application: Microsoft Office Word

MD5: 7fefbacdb38b30133653cdce7cfc2ebd SHA-1: 3b78829245356a77952ea6b8e28715f6520a5bc0 SHA-256: 0cdd227e8a640ed0824247a450aa8477dae0dc9a70c3444325b212c603fd6247

262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for Emotet. The heuristics indicate a hidden-property command stager and auto-execution, suggesting the macro is designed to download and execute a second-stage payload. The ClamAV detection explicitly names Emotet, further supporting this classification.

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-7578627-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-7578627-0
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` `ea621d5fd95ff7fb7405d0c27d69feed6ee451eeffcaeaf019860914fa43e8ae`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12940 bytes

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