Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 77eb40705926158b…

MALICIOUS

Office (OLE) / .DOC

161.2 KB Created: 2019-05-02 16:38:00 Authoring application: Microsoft Office Word
MD5: 3f58bd908710bc2aab99bc8f2129f9c9 SHA-1: b56532a3062ed43fa1c3703e73cdc5486f261896 SHA-256: 77eb40705926158b5dc43657acd06acbd152a96b25ffa0c7570deb2d30f30a55
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 an AutoOpen macro, which is a strong indicator of malicious intent. The critical heuristic 'VBA WMI Win32_Process launcher' suggests the macro attempts to execute a process via WMI. ClamAV detection confirms this as Emotet, a known malware family. The primary function of the VBA script appears to be executing a second-stage payload, as indicated by the WMI process creation and the Emotet family attribution.

Heuristics 7

  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • ClamAV: Doc.Dropper.Emotet-6960272-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-6960272-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
b59f706a7d4dc4f0ccf669525ad940b91a9756194475bc936f0e42c0e431179f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 31085 bytes

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