Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 ba1dc5305e40843a…

MALICIOUS

Office (OLE) / .DOC

196.8 KB Created: 2020-07-17 13:04:00 Authoring application: Microsoft Office Word
MD5: cd5ee7b1f4f0d0584ae78fda9841e71a SHA-1: 3dbbc24a2beffea7206a40cb3259eb40aa7ece75 SHA-256: ba1dc5305e40843a555ffa6b4ba967e1c05541bb1d05d580e3a2c97304029489
300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate

The sample contains a VBA macro that utilizes a hidden UserForm as a command stager, a known technique for Emotet. The macro is auto-executing via the Document_Open event and uses CreateObject to instantiate objects, indicative of a downloader. ClamAV also specifically identifies this as an Emotet variant. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 8

  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
79296a90f1a842a53c2d1f85754f640730b87b416f00b03b5d6203186fd19540		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 66488 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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