VBA injects an Excel-4 macro CALL to a download/exec API

OLE_VBA_XLM_CALL_INJECTION

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critical OLE_VBA_XLM_CALL_INJECTION

What it means

VBA writes Excel-4 (XLM) =CALL() formulas targeting urlmon URLDownloadToFile / Shell32 ShellExecute and runs them.

Why it fires

This VBA-to-XLM bridge downloads and executes a payload while keeping the API names out of normal VBA keyword scanning (the names are split / CHAR-built into cell formulas).

Other Office Macros heuristics

OLE_VBA_XOR_DECODED_SHELL OLE_VBA_DOCUMENT_BODY_DROP_EXEC OLE_VBA_SPLIT_KEYWORD_OBFUSCATION OLE_VBA_AUTOEXEC_NORMAL_TEMPLATE_VIRUS OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER OLE_RAW_MACRO_NATIVE_MEMORY_CALLBACK_LOADER OOXML_VBA_CELL_URL_DROPPER OLE_VBA_REACHABLE_HTTP_DROP_EXEC OLE_VBA_HTTP_DROP_EXEC OLE_VBA_HTTP_RESPONSE_COMMAND_EXEC OLE_VBA_CELL_GETOBJECT_EXEC OLE_VBA_NATIVE_MEMORY_CALLBACK_LOADER OLE_VBA_BITSTRANSFER_DROPPER OLE_VBA_USERFORM_CMD_DROPPER OOXML_VBA_DEFINED_NAME_NETWORK_CONSUMED OOXML_VBA_DYNAMIC_CELL_URL_SOURCE OLE_VBA_HOSTS_FILE_HIJACK OLE_VBA_KEYLOGGER_SPYWARE OOXML_VBA_CELL_IMAGE_SOURCE OLE_VBA_BARE_IPV4_LITERAL