05-23-2016 12:36 PM
We recently discover that sometimes, ramdonly, host called "Windows7" trays to mount a shared folder from our fileserver/DC. We discover this because our SIEM correlated some events from de DCserver. Sadly this SIEM do not show us the Source IP Address so, we add a PAN in SPAM port mode to the switch to tray to capture the ms-smb fail logons.
We started by adding the default custome signature and setting up to triggers with 5 events in 120 seconds (just like the SIEM's alert) but that do not work. Now we are traying to make a custome signatere that triggers when any package with the string "jbonaldo" goes through the PAN (jbonaldo is the host name).
I already read the "creating customg signature rev b" and I can not find any reference to SMB2 for the context field, so i try to use the "unknown-req-tcp-payload". I also tray setting up the string in clear text and/or hexadecimal.
BTW, I already create a vulnerability profile and append that to the security rule (just to be clear 🙂 )
what i am doing wrong?
05-23-2016 01:43 PM
As far as I am aware, no. This is due to the fact that we don't have a context for SMB hostname publicly available to customers to write signatures on, and would require a feature request be filed.
05-23-2016 01:46 PM
Ok, Again, thanks for your help.
05-23-2016 01:47 PM
No problem, sir. Thank you for your patience and for providing the data you did.
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!