What is indicated by the PeFileWritten event type?

The PeFileWritten event type indicates that a process has written a Portable Executable (PE) file to disk. This is significant in the context of security monitoring and threat detection because the creation or modification of executable files can be a precursor to malicious activities, such as the installation of malware or the execution of unauthorized code. By identifying this event, security analysts can respond to potentially harmful actions before they lead to further compromises.

Other options, while they represent important events in security monitoring, do not specifically pertain to file writing actions. For instance, a new process creation relates to the instantiation of a program but does not imply anything about file operations. The event concerning processes being blocked refers to protective measures taken by security systems, and the establishment of network connections is pertinent to monitoring network traffic rather than file activity. Hence, the PeFileWritten event is specifically tied to changes in file integrity and disk activity by processes.