Evolving threats and counter technology
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1 Evolving threats and counter technology James Todd IronPort Systems
2 Agenda The State of SPAM New Spamming Techniques Predicative Security Rebuilding Trust in
3 Zombies Execute Attacks
4 Viruses are Becoming More and More Dangerous... 70% of all spam comes from virus infected PC zombies 75% of all viruses contain spam delivery engines 200% increase in spyware delivered by in the past 6 months 65% increase in keystroke loggers in % increase in rootkits
5 What s changed Old Days Hacking for fame, fun or profit Script Kiddies Hackivists,Black Hats, VX ers Today Hacking for Profit Disorganized crime Web mobs Organized crime The dark side of the Internet involves not only fraud and theft, pervasive pornography, and pedophile rings, but also drug trafficking and criminal organizations that are more intent upon exploitation than the disruption that is the focus of the hacking community. Phil Williams Professor of International Security Studies University of Pittsburgh
6 The Bounce Problem BDOS s Other Billion Dollar Problem Bounces are 9% of Anti-Spam Scanners Are Not Effective Misdirected bounces look legitimate Do not trigger Anti-Spam scores Originate from good reputation senders
7 Bounce DOS 20 fold increase in the number of mails accepted
8 New Trends Come along way since Sobig A Viruses becoming very sophisticated & devastating Warezov virus stub sent via viral payload downloaded via http Rustock goal is to be a spam proxy & send spam but evade detection & analysis Both reside in memory & use alternate data streams for evasion Viral message volume dropping keeps end user paranoia low and effectiveness high Spam, phishing & spyware interwoven
9 The State of SPAM
10 Spam Increases to 60 Billion per Day billions of messages 60 Average Daily Spam Volume % Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct
11 Terabytes (10^12) of spam sent per day Total Volume by Data Size Jumps 900 Every day in October, spam data was equivalent to 35 US Libraries of Congress Data volume of spam (TB) Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct %
12 Image Spam Explodes 5 to 25% Image Spam, % of all spam 30 % Spam with an Embedded Image % Oct- Nov- Dec- Jan- Feb- Mar- Apr- May- Jun- Jul- Aug- Sep- Oct
13 URL Attacks Mutate More Rapidly A Trend Called Domain Kiting Is on the Rise Brings the cost of registering a domain to *zero* Domains are now advertised in spam for < 4hrs Makes URL Blacklists/whitelists ineffective * Source: IPWalk.com
14 New Spamming Techniques
15 Image Spam
16 Why? Jonathan Lebed made $850,000 from Pump & Dump Subj: THE MOST UNDERVALUED STOCK EVER Date: 2/03/00 3:43pm Pacific Standard Time From: LebedTG1 FTEC is starting to break out! Next week, this thing will EXPLODE... Currently FTEC is trading for just $2 1/2! I am expecting to see FTEC at $20 VERY SOON. "Meyers Pollock Robbins" brokerage firm defrauded $176 million from investors using Pump & Dump CEO Michael Ploshnick served 3 years prison
17 Image Spam Gets Sneakier 1. Polka dots 2. Slice & Dice
18 URL Spam
19 One Spam Advertisement Call to Action URL Advertising Pharmaceutical Web Site Hashbuster text from The Hobbit
20 Six Spam Call to Action URL Hashbuster text
21 The Spam Attack Spam Content 1.5 billion messages over 2 weeks ~2000 unique content mutations changed every 12 minutes 1500 unique domains used changed every 15 minutes Spam Source 100,000 infected PCs (zombies) in 119 countries Command and Control (C&C) infrastructure Web sites Web servers DNS servers Payment processing and customer service systems
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23 9 9 $
24 0 8 $
25 Predicative Security
26 Predicative Security Predicate what is good - Predicate what is bad How? Who? CASE MetaVerdict What? Where?
27 Image Spam Example Traditional Content Filters HOW? WHAT? WHO? IP address not on any blacklists No spam content found in message Doesn t match known signatures WHERE? Verdict UNKNOWN
28 Predicative Security for Image Spam HOW? Message leaves trace of spamware tool WHAT? WHO? All text inside an image Random dots appear within the message Nearly identical color scheme in 100,000 s spamtrap msgs IP address recently started sending Message originated from dial-up IP address Sending IP address located in Russia WHERE? Verdict BLOCK
29 Spectrum of colour spread throughout the entire image
30 Limited spectrum of Colours, drastic colour change, produces ECG like pattern
31 Virus Outbreak Example Traditional AV Signature Update Bagle-GT: Mytob-HJ: First AV Signature Available Virus Volume Virus Volume First AV Signature Available FeebsDI-Q: :15 15:20 14:30 13:40 12:50 12:00 11:10 10:20 Virus Volume First AV Signature Available 9:30 21:15 17:30 13:45 10:00 6:15 2:30 22:45 Virus Volume 18:30 Kukudro-A: First AV Signature Available 19:00 14:45 Tim e (GMT) Time (GMT) Tim e (GMT) 11:00 7:15 3:30 23:45 20:00 15:00 10:00 5:00 0:00 19:00 14:00 9:00 4:00 0 Tim e (GMT) Calculated as publicly published signatures from the following vendors: Sophos, Trend Micro, Computer Associates, F-Secure, Symantec and McAfee. If signature time is not available, first publicly published alert time is used.
32 Virus Outbreak Predicates
33 Outbreak Predicates
34 Predicates build context to take Action Messages Scanned & Deleted T1 = 0 zip (exe) files T2 = 5 mins T3 = 15 mins T4 = 8 hours -zip (exe) files -Size 50 to 55 KB. zip (exe) files Size 50 to 55KB Price in the name file Fine-grained Rules, Multiple Parameters: Attachment Type, Attachment Size, URLs, Filenames & More Release messages if signature update is in place
35 Outbreak Predicate Results Tim e (GMT) FeebsDI-Q: 21 hrs 59 mins Lead Time! Kukudro-A: 3 hrs 38 mins Lead Time! Tim e (GMT) 15:20 14:30 12:50 12:00 11:10 10:20 13:40 First AV Signature Available Virus Volume VOF Protection Starts 9:30 21:15 17:30 13:45 10:00 6:15 2:30 22:45 First AV Signature Available 22:15 14:45 11:00 First AV Signature Available 7:15 3:30 23:45 Virus Volume 20:00 15:00 5:00 0:00 19:00 14:00 9:00 Virus Volume 4:00 VOF Protection Starts Tim e (GMT) VOF Protection Starts Virus Volume 10:00 First AV Signature Available VOF Protection Starts 19:00 Bagle-GT: 18 hrs 28 mins Lead Time! 18:30 Mytob-HJ: 32 hrs 57 mins Lead Time! Tim e (GMT) Calculated as publicly published signatures from the following vendors: Sophos, Trend Micro, Computer Associates, F-Secure, Symantec and McAfee. If signature time is not available, first publicly published alert time is used.
36 URL Spam Example traditional content filter Check URL blacklists
37 Web Predicates for URL spam Predicates Web Server Blacklist & Whitelists Domain Blacklists & Safelists Good Reputation Website Composition Data +10 Registered to Fortune 500 Firm for 10 Years No Executable Code Not Linked to Sites with Poor Reputation Global Volume Data Domain Registrar Information Dynamic IP Addresses Dynamic IP address Name Server Data DATA Traffic Spike Server Blacklists & Whitelists Poor Reputation Spikes in URLS found in s -10 On a Phishlist
38 Bounce DOS Based on Bounce Address Tag Validation Proposed RFC Envelope MAIL-FROM address changes so becomes
39 Bounce Address Tag Validation Bounce DOS Protection
40 Rebuilding Trust in
41 Step1# and Web internet gateways must share predicates to secure against evolving threats aaa.ac Firewall SMTP cnn.com HTTP zzz.zw Millions of servers
42 Phishing URLs & Domains Malware URLs & Domains Malware CLSIDs Malware Binaries, Short checksums Malware User Agents Broad Set of Anti-Malware Predicates aaa.ac Firewall HTTP Millions of servers SMTP zzz.zw Broad set of AntiSpam Predicates SpamTraps Complaint Reports Message Composition White/Blacklists Volume
43 Step2# Establish encrypted applications WebSafe Webmail 1 Secure Secure Desktop Messaging 2 SMTP HTTP Pull Push SecureDocuments Statements, Invoices, etc. Secure Messaging Application Platform 3 MessageCentre Integrated Customer Service Communication S/MIME or OpenPGP Certificate based mail Without the need for Client software for any mail platfrom Envelope Offline and Registered
44 Steps1&2 address Business needs and concerns Businesses rely on electronic communications for many of their business processes, however Legislation and regulations impose tighter regimes for information security and governance Concerns about security, especially B C and B B Data Protection Act, ISO17799, Sarbanes-Oxley, Businesses can see efficiency savings and new business and revenue opportunities Statements 60p (paper) vs. 5p (electronic) Customer service (call centre) vs. 6p ( )
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50 A New Class Of Emerges Secure, Authenticated, Business Class Mail + DK Authentication + Encrpytion + Positive Reputation Reliable, unrestricted service Trusted Sender - Unwilling to authenticate or encrypt Service restrictions and filtering Unknown Sender
51 Questions Thank You James Todd Technical Manager IronPort Systems
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