MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
T1027 Obfuscated Files or Information
The sample contains Excel 4.0 macros, specifically an Auto_Open function, which is a known technique for executing malicious code. The ClamAV detection explicitly names Emotet, and the macro's structure suggests it is designed to download a second-stage payload from the reconstructed URL. The use of string concatenation in the DOC BODY to form the URL is a common obfuscation tactic.
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-aa87d5786a858772-9953435-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Downloader.Emotet-aa87d5786a858772-9953435-0
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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.txta1f533b7e0b31a7e4cec4c1ffe9cf76629dfb7a4a34de6d0e30f5bffd47620f7 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 8022 bytes |
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