So, the worm based on MS08-067 was rumored last week and now SANS confirms that the worm is spreading from at least one host. SANS is blaming 220.127.116.11. We also have seen scans from 18.104.22.168, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206 and a ton more. Those started to increase dramatically starting this morning around 9:25 am Eastern and have continued throughout the day.
HoneyPoints on consumer bandwidth networks and commercial ISP’s alike are picking up a spike in 445 scans and traffic.
Obviously, given the metasploit framework’s improvement of the exploit in the last week or so and the myriad of proof of concept tools that have been filtering around the underground, the threat of a worm is a reality. Worm code was first announced several days ago, but seemed to fail to propagate likely due to the lack of port 445 being available on most Internet connections. However, it appears that some victims have been found and have been slowly accumulating.
While we are not yet seeing the massive scans and probes associated with the worms of the past, we are beginning to see traffic levels that indicate increasing worm behaviors.
Obviously, if you have not yet ensured that port 445 is blocked at your Internet connection, you should immediately do so. HoneyPoint users can also setup TCP listeners or basic TCP HornetPoints to discover and attempt to “defensive fuzz” the worm code. Mixed results of causing termination have been shown so far, but our lab is working on a HornetPoint configuration to cause exceptions in the worm code in a stable manner.
HoneyPoint TCP listeners can be deployed on Linux boxes and other platforms where port 445 is undialated and used to identify hosts performing 445 scans and probes. This is an excellent approach to finding laptops and portable devices that might be infected on the internal network.