MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.005 Visual Basic
The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. ClamAV detection confirms it as Xls.Dropper.Agent-8804005-0, suggesting its purpose is to act as a dropper. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) implies it executes automatically upon opening, likely to download and execute a second-stage payload.
Heuristics 3
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ClamAV: Xls.Dropper.Agent-8804005-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Xls.Dropper.Agent-8804005-0
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Encrypted Excel 4.0 macro sheet high OLE_XLM_ENCRYPTED_MACROSHEETWorkbook contains an Excel 4.0 macro sheet and BIFF FILEPASS encryption. Password-protected XLM macro sheets, especially the default Excel password path, are a common malware evasion pattern because static formula extraction may fail until the workbook is decrypted.
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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.
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