Xprotectpluginservice and diskimages-helper

XProtect is part of the macOS security. Diskimages-helper is exactly what it sounds like. macOS has their own .dmg image archive which macOS uses a lot within macOS plus users can also use Disk Utility or a third party app like Carbon Copy Cloner to create .dmg archive files to store their own files. macOS also has a couple other image formats as well which users can utilize as well.

https://en.wikipedia.org/wiki/Apple_Disk_Image

FYI, just stay out of the Console app and avoid all the macOS system logs because they are useless for troubleshooting these days (and has been for many many years now). The logs are flooded with tons of repetitive entries from both macOS and third party apps. Many of the entries are cryptic non-sensical and scary sounding entries because they are usually programmers' debug entries that should not even be enabled on a fully released product. You will just drive yourself insane looking at these logs. The only slightly useful logs are the Kernel Panic logs if they exist, but these will only occur if the Mac has an unexpected shutdown caused by a hardware of software issue.

Lots of entries in the system logs will appear scary looking like something is wrong and even make you think nothing is working correctly. Even if something important was registered in the logs it would be difficult to detect it or even recognize it as a problem.

macOS already provides great security, but people also need to do their part by practicing safe computing habits as well. This combination should make it much less likely for someone to compromise your computer or information & accounts unless you are a high value target for government monitoring or scammers. Remember anyone with physical access to your devices (especially unmonitored even if the device is locked) may be able to compromise that device no matter the level of security since hardware & software are always being patched & updated for newly discovered vulnerabilities. Here is an excellent article written by a well respected forum contributor regarding safe computing practices:

Effective defenses against malware and other threats - Apple Community

Using Two Factor Authentication (2FA) to protect your accounts helps a lot, but Multi-Factor Authentication (MFA) is even better especially if you are a high value target since there are ways to compromise 2FA methods.