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Sefnit Botnet Swaps Tor for SSH
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RyanSepe
RyanSepe,
User Rank: Ninja
4/30/2014 | 7:14:38 PM
Business and Safeguard standpoint
Now that Sefnit is using the SSH protocol what are some things to look out for? What I can see from the article is that it hits home for Remote Adminstation that uses SSH. Meaning what are some methods to protect from this and is user action required to become vulnerable or just an SSH protocol? I just want to see if from an Enterprise perspective how this affects, so that plans can be made. 
Anthony Schimizzi
Anthony Schimizzi,
User Rank: Apprentice
5/1/2014 | 8:49:42 AM
Re: Business and Safeguard standpoint
User action is required in some way to become infected, whether clicking a link in an email to run the malicious code or more sophisticate like downloading a legitimate video which states you need an updated codec (which is actually the bot code) to view it.  User access control will be one of the first places to look.

Another thing to help the posture of your enterprise network in this scenario would be to granularly inspect traffic outbound at your SDP.  A lot of people really focus on how to prevent and outside attack from emanating and don't put as much attention to what traffic is leaving your network.  A good baseline of operational traffic that will traverse outside the SDP will make your life a lot easier when trying to spot a bump in the wire.  In this case, SSH connections back to a Russian entity.  If a baseline is not in place due to a large amount of public Internet traffic, then alerts and suspicious traffic need to be investigated.  With SSH it can be hard to find that right signal-to-noise ratio for your company.  For example, if you know your company does not have any affiliation with Russia, alerts and notifications from your SIEM should be on your IR/ID team's monitors for SSH traffic or any type of traffic, sourced from inside your network and destined to a Russian ip.

 
Kelly Jackson Higgins
Kelly Jackson Higgins,
User Rank: Strategist
5/1/2014 | 10:47:56 AM
Re: Business and Safeguard standpoint
Facebook's Security Team identified some key files, domains and artifacts and other indictators of compromise for enterprises to be on the lookout for, but these are just a sampling:

https://www.facebook.com/notes/protect-the-graph/sefnit-is-back/1448087102098103


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