Security, For DNS and by DNS. ZHOU Yonglin Beijing, Nov 009
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1 Security, For DNS and by DNS ZHOU Yonglin Beijing, Nov 009
2 DNS and Security FOR DNS SECURITY BY DNS
3 SECURITY, FOR DNS DNS attack Handling Vulnerability Handling DNS Monitoring
4 5.19 Storm Gate : Attack Flow Against DNSPOD 2009/05/18 21:00
5 5.19 Storm Gate : General View of Recursive DNS Query Flow of China networks 05/18-05/19
6 Emergency Response 2009/5/19 Monitor the abnormal flow against the DNS Servers Analyze the abnormal flow against the DNS Servers 2009/5/22 Trace the attack origins against DNSPOD 2009/5/25 Provide evidence for case cracking, prosecution
7 Other Attack Cases Against DNS 2009/6/9 9:30 DDos attack against 4 DNS servers of XinWangHuLian, Beijing( 0.5 million domain names got resolution failures 2009/7/3 3:00 DDos attack against DongNanRongTong, Xiamen Attack Volume 300M, service outage lasting 7 hours or so 2009/6/10- /6/12 DDos attack against XiWang Dynamic DNS Service System Service outage influences millions of enterprises and customers
8 DNS Spoof Vul. Published by Dan Kaminsky
9 Metasploit 3.2
10 Emergency Response 2008/7/28 Publishing the Vulnerability Report on CNCERT web site Convening telecommunication operators, DNS Registry/Registrar for information sharing 2008/7/29 Monitoring Domain Name Hijack Monitoring attack flow against DNS service
11 Bind Dos Vul.(CVE ) Report:2009/07/28 Debian Bug report logs - # bind9 dies with assertion failure (db.c:579) Detail:: db.c:659: REQUIRE(type!= ((dns_rdatatype_t)dns_rdatatype_any)) failed exiting (due to assertion failure). Affected Systems: ISC BIND 9.x(0<=x<=6)
12 Emergency Response 2009/7/29 Verify and analyze vulnerability Publish BIND 9 critical vulnerability report Convene telecommunication operators for information sharing 2009/7/30 Publish BIND 9 Vulnerability danger level and scope Convene registry and registrar for information sharing and response proposal 2009/7/31 Track the vulnerability patch progress
13 07-31T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T22 受影响 Bind 服务器的百分比 Bind Dos Vul. Patch Application Monitoring 97% Ratio of BIND Servers affected by CVE % 95% 94% 93% 92% 91% 90% 89% 07/31-09/17
14 DNS Status and Domain Name Hijack Monitoring
15 SECURITY, BY DNS Conficker Worm Monitoring Passive Domain Monitoring Malicious Server Handling
16 Conficker Sinkhole Based on DNS Support.B(40+)+.C(400+)
17 Passive DNS Monitoring by Telecommunication Operator Analysis on Abnormal Domain Name Behavior based Botnet Controller Analysis IP Reverse Resolution Botnet Controller Domain Name Derived from IP Tracking of Malicious Domain Name DNS Server Status Analysis Request number for specific domain names Request Client number for specific domain names
18 Behavior Based Controller Abnormal Domain Name Analysis darkroot.3322.org zjddos.3322.org haoj org ashly.9966.org magic org
19 DNS Server Status Analysis
20 Statistics of TLD Request - TOP10 TLD Request Times Percentage com % cn % net % org % in-addr.arpa % info % tv % biz % cc % ws % T20-55
21 Statistics of Second Level Domain Name Request - TOP10 SLD Request times Percentage qq.com % com.cn % sandai.net % baidu.com % tencent.com % 360safe.com % xunlei.com % sohu.com % 3322.org % taobao.com % T20-55
22 IP Reverse Resolution Select distinct domain_name, time form pasv_dns_table where ip= T06-25 www3.caishow.com T T06-25 s18.wo99.com T T06-25 wwwxjrsf.cn T06-25 q8me.igap.bihu.com T06-25 wap11.qqmail.com T06-25 b0bfac4.iprophesy.com.cn T06-25 event50.wanmei.com T06-25 pfad.netmovie.com.cn T T05-50 gxway168cn.net T05-50 e891.p.akamaiedge.net T T05-50 a1293.g.akamai.net T05-50 a151.ce.w.tl88.net
23 Tracking Malicous Domain Name Record Select distinct time, domain_name, ip form pasv_dns_table where domain_name= 114pc org T pc org T pc org T pc org T pc org T pc org T pc org
24 Malicious Server Handling by Hitting Domains In the past 12 months, about 567 domains that used by malicious servers have been stopped. WHO CNCERT CNNIC Chinese Registrars WHAT Trojan or Botnet Control Serves Maware sample download source Phishing page host site, etc WHEN General Duty Special Events Assuarance Beijing Olympics National Day Celeberation National Games, etc
25 Malicious Domain Name BlackList domain-black-list.txt rbl.efnet.org rbl.efnetrbl.org s.rizon.net shrikehosting.com uploader.me.uk waxs.kaist.ac.kr
26 SECURITY, FOR DNS AND BY DNS DNS attack Handling Vulnerability Handling DNS Monitoring S E C U R I T Y Conficker Worm Monitoring Passive Domain Monitoring Malicious Server Handling
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