#log4j theoretical worm depending on propegation speed might just blend in with the noise for a while.
Ideally right now reducing attack surface should be everyone's top priority
Unfortunately we are dealing with a bug with unprecedented vectors.
Everyone right now shouldn't even focus on worm capabilities because exploitation is so wide spread right now it doesn't even increase your risk level, attackers are doing nearly identical to what worm activity would be like.
Traffic congestion and network bottlenecking tho...
Historically if we look at worm activity it took roughly a week to 14 days for them to be widespread & developed
However those in the past didn't use logic flaws & required memory corruption exploits which are less reliable & complex payloads.
#Log4J based on what I've seen, there is evidence that a worm will be developed for this in the next 24 to 48 hours.
Self propagating with the ability to stand up a self hosted server on compromised endpoints.
In addition to spraying traffic, dropping files, it will have c2c
Biggest hurdle appears to be implementing a JDK gadget to enable code execution on limited env.
That is currently being researched by several groups.
Honestly I'm kinda surprised it isn't finished yet, but I have seen at least 3 groups (Eastern euro, .ru and .cn) that are investigating options to do this.
Goals appear varied: financial gain via extortion as well as selling access to compromised hosts to RaaS groups
So when you see the "You just got RCE and you use it to info dump" people, please kindly remind them that RCE isn't always as fancy as they would love to think