Emotet Office (OLE) / .DOCX malware analysis — malicious · 09eb830504d741bc

MALICIOUS

Office (OLE) / .DOCX

175.5 KB Created: 2020-07-29 21:18:00 Authoring application: Microsoft Office Word

MD5: f45feed4990d9cd2fd39f0c65d6f9ce1 SHA-1: fca6543360cd426837f6d1e51113b1e9913e9ec9 SHA-256: 09eb830504d741bcee262df02b0ab081a25e11103b0dbb29bba815277d9f43ad

262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet. The critical heuristic 'OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER' and the ClamAV detection name strongly suggest this family. The VBA script appears to be obfuscated but is designed to execute a command stager, likely for downloading additional malware.

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-9206256-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9206256-0
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` `73a28a0ea868ae07dbea00c874094a37ccaf4411b53fec8e8e3897e28bec3026`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5070 bytes

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