MALICIOUS
60
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic for Applications
The sample is an Excel 4.0 macro sheet that is encrypted, as indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) suggests that the macro sheet is designed to execute automatically upon opening the file. The encrypted nature and the presence of auto-execute macros strongly suggest malicious intent, likely to download and execute a secondary payload.
Heuristics 2
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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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