Re: Creating a module and accessing an event in another script
Merril Mathew <[email protected]>
| Newsgroups | gmane.comp.security.detection.bro |
|---|---|
| Message-ID | <[email protected]> |
Hi Justin, Thanks again. I made the changes you sent and I am getting this error on reporter.log. “ 1559839456.472514 Reporter::ERROR field value missing [SSH::rec$auth_success] /usr/local/bro/share/bro/site/alert_ssh_attempt.bro, line 22” But it definitely returns auth_success=F when running on .pcap. I assume auth_success will be T when I ssh into the box? Kind regards, Merril. > On 6 Jun 2019, at 17:22, Justin Azoff <[email protected]> wrote: > > email_ssh_attempt.bro is not required at all because you already added Login_Attempted to Notice::emailed_types in the other script. > > Your other script is slightly broken because in the case of unknown result the field is not present, so your script needs to look like this. > > event log_ssh(rec: Info) &priority=5 > { > if(!rec?$auth_success) { > NOTICE([$note=SSH::Login_Attempted, $msg=fmt("Unknown")]); > } > else if(rec$auth_success == F) { > NOTICE([$note=SSH::Login_Attempted, > $msg=fmt("SSH login attempted from %s, %s many times and failed", rec$client, rec$auth_attempts)]); > } else { > NOTICE([$note=SSH::Login_Attempted, > $msg=fmt("SSH login attempted from %s, %s many times and succeeded", rec$client, rec$auth_attempts)]); > } > } > > if you look at your reporter.log you should see it filled with errors like this: > > Reporter::ERROR field value missing [SSH::rec$auth_success] alert_ssh_attempt_new.bro, line 14 > > > > > On Thu, Jun 6, 2019 at 12:10 PM Merril Mathew <[email protected] <mailto:[email protected]>> wrote: > Hi All, > > I cannot figure out why the Notice doesn’t behave as expected on live traffic. I am now trying to make it work with SSH (log_ssh) event as previous attempt on ssh_auth_result lead me nowhere. If I raise the NOTICE function just after the log_ssh event from a script it sends me email on live traffic. However if I use the NOTICE function inside IF, ELSE IF, ELSE conditionals for auth_success boolean then it does not send me emails. Anyone see what I am doing wrong? I couldn’t figure it out from Notice documentation. > > Please find attached the scripts for reference. > > Kind regards, > Merril. > >> On 5 Jun 2019, at 18:39, Justin Azoff <[email protected] <mailto:[email protected]>> wrote: >> >> that script should generally work, but it was a lot more complicated than it needed to be to accomplish what you are trying to do. Here is a much simplified version. >> >> The only thing to keep in mind is that since you are using zeek_init to setup the log stream this won't work on bro or a small number of zeek builds from right after the rename. There are no released versions of zeek so I don't know when you built it. Using bro_init is backwards compatible and is probably better for now. >> >> On Wed, Jun 5, 2019 at 12:46 PM Merril Mathew <[email protected] <mailto:[email protected]>> wrote: >> Hi Justin, >> >> I can confirm that attached scripts does not send me email on live traffic or create a log under $PREFIX/logs/current. But it does create notice.log and a SSHAttempt.log when running pcap. I can also confirm that send mail set up is working as I have received emails from zeek from other scripts. >> >> Kind regards, >> Merril. >> >> >> >>> On 5 Jun 2019, at 17:20, Justin Azoff <[email protected] <mailto:[email protected]>> wrote: >>> >>> On Wed, Jun 5, 2019 at 12:11 PM Merril Mathew <[email protected] <mailto:[email protected]>> wrote: >>> Hi Justin, >>> >>> Thanks. But it did not work for me. >>> >>> Did not work how? Did you post the version of the script that didn't work? >>> >>> -- >>> Justin >> >> >> >> -- >> Justin >> <main.zeek> > > > > -- > Justin _______________________________________________ Zeek mailing list [email protected] http://mailman.ICSI.Berkeley.EDU/mailman/listinfo/zeek