Syspeace for internal brute force protection on Windows Servers

After installing Syspeace , the tech guys started getting notifications that their Exchange Server was trying to login to another server and it was rejected. There was no reason for this server to do so whatsoever and it had not been noticed earlier so it’s hard to say when it actually started.

After disabling the whitelist for the LAN at the customer site they started getting mail notifications that every workstation on their LAN was actually trying to login to various servers using various usernames and password, hence a brute force attack/dictionary attack from the inside.

Most likely a trojan has been planted somewhere and it has infected the rest.

This is a fairly simple example of how Syspeace can actually reveal a security breach a customer wasn’t even aware of had occured.

It is totally up to any customer to use whitelists for the LAN but as a precaution, I personnally wouldn’t recommend it since it acutally gives you a great heads up that something has happened if a computer or multiple computers suddenly starts to try and login to servers they’re not supposed to.

As a system administrator, you get the chance to get attack automatically blocked, logged, traced and reported and you can have a closer at the computer responsible for the attack or have a word the user to see what’s going on.

You can even create extensive reports on all activity originating from that user or computer using the Access Reports section in Syspeace to get a more clear view on how long it’s been trying and so on.

Since Syspeace automatically protects failed logins using Winlogon authentication, your Windows servers are also protected from computers/users trying to use the ”net use” or ”map network drive” with invalid logon credentials trying to acces shares they’re not supposed to.

If you don’t have processes in place for scanning logs, saving them and monitoring every login activity, it will become grusome task to even know if there’s something going on at all. You simply won’t have the tools to do so.

Have your own servers run the fully functional Syspeace free trial and see if you get any unexpected login failures from the internal network and from Internet.
You might be surprised.

By Juha Jurvanen

Syspeace

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