MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
T1059.001 PowerShell
T1059.003 Windows Command Shell
T1059.004 JScript/VBScript
The critical heuristics indicate the presence of Excel 4.0 macros with an Auto_Open function, specifically using the RUN API, which is a strong indicator of malicious intent. ClamAV detection further confirms this, identifying it as Emotet. The macro sheet contains multiple URLs that are likely used to download and execute a second-stage payload. The Auto_Open macro is designed to execute automatically when the workbook is opened, facilitating the download and execution of malicious content.
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.txt7ab5ef6689937532951c996fe211a2ac046a3dbc546728bfe725212729605929 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 6790 bytes |
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