Security Onion. Peel Back the Layers of Your Network in Minutes. Doug Burks
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1 Security Onion Peel Back the Layers of Your Network in Minutes Doug Burks
2 tcpdump -nnai eth1 -s0 grep -A5 "Doug Burks" About Doug Burks: Christian, husband, father Corporate Incident Handler for Mandiant SANS GSE and Community Instructor President of Greater Augusta ISSA Founder and lead developer of Security Onion
3 What is Security Onion? Security Onion is a FREE Linux distro for: intrusion detection network security monitoring log management
4 What data does it give me? Flow data from Argus, Bro, and PRADS Alert data NIDS alerts from Snort/Suricata HIDS alerts from OSSEC Syslog data received by syslog-ng or sniffed by Bro Asset data from Bro and PRADS Transaction data http/ftp/dns/ssl/other logs from Bro Full content data from netsniff-ng
5 Does it scale? Big Onions 64-bit Big Traffic PF_RING Big Data ELSA
6 How many Security Onion users are there? Over 100,000 ISO downloads from Sourceforge! Security Onion ISO (based on Ubuntu 10.04) - 37,777 Security Onion ISO (released 12/31/2012) - 34,573 Security Onion ISO (released 6/10/2013) - 7,511 Security Onion ISO (released 7/25/2013) - 6,396 Security Onion ISO (released 9/14/2013) - 15,824???? From BitTorrent???? Ubuntu/Kubuntu/Lubuntu + Security Onion PPA
7 What has changed since last FloCon? Updated just about every piece of software, including: Snort, Suricata, Bro, PF_RING, PRADS, ELSA, Snorby, Squert, CapMe, NetworkMiner Fixed lots o bugs! Moved to a standard argus.conf to allow more Argus customization Added more knobs for tuning: Enable/disable sensor processes Adjustable netsniff-ng (full packet capture) settings Adjustable log purge threshold Added OnionSalt to manage lots o onions
8 What does it look like?
9 Answer a few simple questions
10 Snorby
11 Pivot to pcap from Snorby
12 CapME
13 Squert web interface
14 Sguil client
15 Pivot to pcap from Sguil
16 NetworkMiner There s gold in them thar PCAPs!
17 ELSA
18 Pivot to pcap from ELSA
19 Ooh shiny
20 Case Study Was an EXE downloaded? Was it executed? Was the computer compromised? Was there any data exfil?
21 Bro Flow
22 Who did this IP talk to?
23 And over what ports?
24 What all do we know about the source?
25 Found an EXE
26 IP address in EXE
27 Traffic to hardcoded IP address
28 Interesting FTP Activity
29 Interesting FTP Activity
30 Interesting FTP Activity - RAR
31 Extract the RAR
32 What s in the RAR?
33 Future of Security Onion More documentation Best practices Tuning Web interface for administration More/better integration with Argus? Add Silk? Others?
34 Where do we go now? Updates are announced here and it also has the following links: Download/Install FAQ Mailing Lists IRC #securityonion on Security Onion classes throughout 2014!
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