Emotet Office (OLE) malware analysis — malicious · d6c68e1e51fca5de

MALICIOUS

Office (OLE)

184.6 KB Created: 2019-12-17 09:17:00 Authoring application: Microsoft Office Word

MD5: 824f5600e4068e9164f9c29d60e8bf4f SHA-1: b86a486c368ed19d978fc40a7f4e0486619c2c3a SHA-256: d6c68e1e51fca5de0dfa22830ab0c67ef3eb88649c5a1ca3e0e8dc45facfd0a3

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 is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-7461037-0', indicating a known downloader variant of Emotet. Critical heuristics indicate the presence of a VBA UserForm hidden-property command stager that executes automatically upon opening the document. This macro likely downloads and executes a secondary payload, a common tactic for Emotet to establish initial access and further compromise the system.

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-7461037-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-7461037-0
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` `1903b96a86f5973da5c17839e88d0078ac04084580972a592171487bd1dd8502`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	9822 bytes

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