I can confirm Creative Cloud has added to my /etc/hosts file.

Adobe secretly modifies your hosts file for the stupidest reason: https://www.osnews.com/story/144737/adobe-secretly-modifies-your-hosts-file-for-the-stupidest-reason/

@marcedwards I haven't experienced this yet, but I also kill any Adobe daemons when Photoshop/Illustrator/etc aren't running. I wonder if that makes the difference.
@iccir It might! It’d make sense that the apps themselves aren’t the ones to make the modification.
@marcedwards I'll try to do a quick search when I get back to my computer and try to figure out which helper/agent/daemon is modifying this. Maybe there is a default to disable it.

@marcedwards I didn't find anything, but I'm also running an older version of Creative Cloud on Sonoma (I don't update apps until I can verify my workflow won't break).

You might want to try:
`find /Applications/Utilities -name "*Adobe*" -print0 | xargs -0 grep -d recurse "Cloud WAM"`

I'm guessing they probably have some shell script that's making the entry.