MALICIOUS
100
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
The sample is an encrypted Excel 4.0 macro sheet, indicated by multiple heuristic firings including OLE_XLM_ENCRYPTED_MACROSHEET and OLE_XLM_AUTOOPEN. The presence of encrypted macros strongly suggests the document is intended to deliver and execute malicious code. No document body or script content was available for further analysis, limiting the ability to determine the specific payload or delivery mechanism.
Heuristics 3
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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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OLE metadata lists many Excel 4.0 macro sheets high OLE_XLM_DOCPROPS_MACROSHEET_INVENTORYWorkbook contains a BIFF Excel 4.0 macro-sheet marker and its clear OLE DocumentSummaryInformation stream lists many MacroN sheet titles. This is a useful static signal when FILEPASS encryption prevents formula extraction from the workbook stream.
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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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