VBA native-memory callback shellcode loader

OLE_VBA_NATIVE_MEMORY_CALLBACK_LOADER

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critical OLE_VBA_NATIVE_MEMORY_CALLBACK_LOADER

What it means

VBA auto-exec macro combines native memory allocation, process-memory write/copy, and callback/timer execution APIs.

Why it fires

In-memory VBA loaders allocate writable memory, copy a decoded payload into it, then transfer control through a callback or timer API such as CreateTimerQueueTimer. Benign document automation does not need the NtAllocateVirtualMemory/NtWriteVirtualMemory/callback triad.

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_XLM_CALL_INJECTION 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