Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 06b64e2e53c08beb…

MALICIOUS

Office (OLE) / .DOC

236.9 KB Created: 2020-02-07 13:40:00 Authoring application: Microsoft Office Word
MD5: 4102b1f32e61ac1ad24c12cb693028af SHA-1: 2d13ed786321e63d2b84effa83459d83b6a3e34c SHA-256: 06b64e2e53c08beba1406ecb836952a5dd862fd465f5c7ff102f4f950d5430f8
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-7580201-0', strongly suggesting the Emotet family. Critical heuristics indicate the use of a hidden UserForm and VBA macros for command staging, which is a common Emotet technique to download and execute further payloads. The Document_Open macro is automatically executed upon opening the document.

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-7580201-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7580201-0
  • 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
118be45ec3b2dfe63391f034c8a12e159718c7d411498b5b4a41bb83a584c243		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10822 bytes

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