MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
The file is identified as malicious by ClamAV with the signature Xls.Downloader.Emotet-ea81817e7f807ab1-9952142-0. Static analysis revealed the presence of Excel 4.0 macros, specifically an Auto_Open function that utilizes dangerous API calls like RUN. This indicates the macro is designed to execute arbitrary commands, a common technique for downloading and running further malicious stages.
Heuristics 4
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
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XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
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ClamAV: Xls.Downloader.Emotet-ea81817e7f807ab1-9952142-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Downloader.Emotet-ea81817e7f807ab1-9952142-0
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt5256f8d02b5455a690e7e52d7503a743c939c4c0d6be0d7d0ac816b796f21179 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 8057 bytes |
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