Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 087e866a6e659b16…

MALICIOUS

Office (OLE) / .DOCX

191.2 KB Created: 2020-07-17 19:04:00 Authoring application: Microsoft Office Word
MD5: 4d4827ab7182c22adc4e8ddb762da79d SHA-1: 5a839256bc6b8d1e82f89b96d4af0a060b16a02e SHA-256: 087e866a6e659b16153a3ad2e219c7ef4b9f4c64703fa87ad1942f582c6dd5ea
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, including a Document_Open auto-execution macro and a hidden UserForm command stager, which are strong indicators of Emotet activity. The ClamAV signature also explicitly identifies it as Emotet. The macro's obfuscated nature and use of CreateObject suggest it is designed to download and execute a secondary payload.

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-10022426-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-10022426-0
  • 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.

FilenameKindSourceSize
macros.bas
6dc4d4bace799b81b3cebe7a5b6f9e68300b0bfe91d2cc6c54f75de2cea2f7c6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 71503 bytes

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