Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 692823887bbac35e…

MALICIOUS

Office (OLE)

229.8 KB Created: 2020-08-14 22:18:00 Authoring application: Microsoft Office Word
MD5: be89de25a79b23f3b668359e506d3b72 SHA-1: 9b56ec8dcfeca99167da85d5088e533c126d21d1 SHA-256: 692823887bbac35e5838510b1349d2350db983776ad0b73ea078f4749ec82cc2
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The sample contains VBA macros, including a Document_Open auto-execution macro and a hidden-property command stager, which are indicative of Emotet's typical behavior. The ClamAV detection explicitly names Emotet, confirming the family. The VBA script is designed to execute obfuscated code, likely to download and run 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-9343219-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9343219-0
  • 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
a41bede6b31c342f92c22747c23e2e7c6c77a42c803725a917c6179e5e099194		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8350 bytes

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