It's a group claiming to be "Anonymous" but they don't seem to be the kind of people we would expect to be "Anonymous"
They have been running with the #OpQAnon and similar hashtags for a few weeks, threatening to doxx #QAnon peeps.
The #QAnon hashtag streams have downtime on twitter but usually run about 300 tweets/hr baseline and up to #1000/hr when Q posts.
If they have been "successful" I haven't noticed yet although there are periods where the #QAnon posts are shadowbanned, which I guess is coming from twitter.