MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic for Applications
T1059.001 PowerShell
The file contains Excel 4.0 macros, specifically an Auto_Open entry that is obfuscated and chained to execute. ClamAV identifies this as 'Xls.Dropper.Agent-8009514-0', indicating its function as a dropper. The macro execution chain suggests it is designed to download and execute a second-stage payload.
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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Obfuscated XLM Auto_Open execution chain critical OLE_XLM_OBFUSCATED_AUTOEXEC_CHAINExcel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and an obfuscated formula execution chain. The macro builds strings through FORMULA(CHAR(...)), primes state with SET.VALUE / GET.CELL / GOTO, and transfers control through RUN(). This is a high-confidence XLM malware pattern.
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ClamAV: Xls.Dropper.Agent-8009514-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Dropper.Agent-8009514-0
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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.txt181eccffbcb832f4ec7e3e2db61510e24dfb46dc7e8ea884c407b97534bfb11b |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 129127 bytes |
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