All your files now belong to us
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Ransomware: All your files now belong to us. The future and impact of ransomware.
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All your files now belong to us
- 1. Peter Wood Chief Executive Officer First Base Technologies LLP Ransomware: All your files now belong to us The future and impact of ransomware
- 2. Slide 2 © First Base Technologies 2016 Founder and CEO - First Base Technologies LLP • Engineer, IT and information security professional since 1969 • Fellow of the BCS, the Chartered Institute for IT • Chartered IT Professional • CISSP • Senior Member of the Information Systems Security Association (ISSA) • 15 Year+ Member of ISACA, Member of the ISACA Security Advisory Group • Member of the Institute of Information Security Professionals • Member of the BCS Information Risk Management and Assurance Group • Chair of white-hats.co.uk • UK Programme Chair for the Corporate Executive Programme • Member of ACM, IEEE, First Forensic Forum (F3), Institute of Directors • Member of Mensa Peter Wood
- 3. Slide 3 © First Base Technologies 2016
- 4. Slide 4 © First Base Technologies 2016 Introduction Ransomware: All your files now belong to us
- 5. Slide 5 © First Base Technologies 2016 Definition Ransomware is a type of malware that prevents or limits users from accessing their system, either by locking the system's screen or by locking the users' files unless a ransom is paid More modern ransomware families, collectively categorised as crypto-ransomware, encrypt certain file types on infected systems and force users to pay the ransom through certain online payment methods to get a decrypt key Source: http://www.trendmicro.com/vinfo/us/security/definition/Ransomware
- 6. Slide 6 © First Base Technologies 2016 Scale Source: http://phishme.com/q1-2016-sees-93-phishing-emails-contain-ransomware/
- 7. Slide 7 © First Base Technologies 2016 Business impact • Ransom ‘fee’ • User support during incident • Lost user productivity • Recovery and restoration • Crisis management • Press and PR • Communicating with customers and business partners • Post-incident analysis • Planning for mitigating controls • Implementing mitigating controls • Testing mitigating controls
- 8. Slide 8 © First Base Technologies 2016 Target systems • PCs and laptops • Mobile devices • Servers • Networks • Databases • Cloud systems • Online backups • Real-time DR systems • ICS / SCADA systems
- 9. Slide 9 © First Base Technologies 2016 Infection • Downloaded onto systems when unwitting users visit malicious or compromised websites • Arrives as a payload dropped or downloaded by other malware • Delivered as attachments from spammed email • Downloaded from malicious pages through malvertisements* • Dropped by exploit kits onto vulnerable systems Source: http://www.trendmicro.com/vinfo/us/security/definition/Ransomware * an online advertisement that is infected with malicious code
- 10. Slide 10 © First Base Technologies 2016 Evolution Ransomware: All your files now belong to us
- 11. Slide 11 © First Base Technologies 2016 Evolution: RaaS
- 12. Slide 12 © First Base Technologies 2016 Evolution: RaaS
- 13. Slide 13 © First Base Technologies 2016 Evolution: Try before you buy http://www.symantec.com/content/en/us/enterprise/media/security_response/whitepapers/the-evolution-of- ransomware.pdf
- 14. Slide 14 © First Base Technologies 2016 Evolution: IoT
- 15. Slide 15 © First Base Technologies 2016 Evolution: Office 365 22 June: Avanan's Cloud Security Platform detected a massive attack against its customers that were using Office 365 The zero-day Cerber ransomware was spread through email and encrypted users’ files using macros This malware played an audio file, informing the user that the computer’s files have been encrypted while a warning message was displayed on screen Source: http://www.avanan.com/resources/attack-on-office-365-corporate-users-with-zero-day-ransomware-virus
- 16. Slide 16 © First Base Technologies 2016 Evolution: worm behaviour Source: https://blog.knowbe4.com/microsoft-alert-zcryptor-ransomware-with-worm-feature
- 17. Slide 17 © First Base Technologies 2016 Targeted Ransomware Ransomware: All your files now belong to us
- 18. Slide 18 © First Base Technologies 2016 Targeted ransomware: Samas Source: https://blogs.technet.microsoft.com/mmpc/2016/03/17/no-mas-samas-whats-in-this-ransomwares- modus-operandi/ Infection chain diagram: How Ransom:MSIL/Samas gets into the system
- 19. Slide 19 © First Base Technologies 2016 Samas distribution 17 March 2016
- 20. Slide 20 © First Base Technologies 2016 Targeted ransomware: Samas • In March 2016, the FBI posted alert about SAMAS as a very real threat to enterprises/businesses • Specifically, its ability to encrypt files not only on the system it infects but also those shared on the affected organisation’s network • It also goes after network-stored backups, clearly in an attempt to undermine the typical recommendations for dealing with ransomware • Threat actors currently using SAMAS are also taking advantage of the malware’s ability to enact a persistent infiltration to “manually locate and delete” the mentioned backups • Its routines seemingly mirror those of a typical targeted attack: it uses other malicious components to do penetration tests against its target servers as well as scan them for vulnerabilities in its quest to infiltrate Source: http://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/fbi-posts-warning- about-ransomware-that-goes-after-backups
- 21. Slide 21 © First Base Technologies 2016 Samas case study • MedStar, a non-profit group that runs 10 hospitals in the Baltimore and Washington area, was attacked with Samas in April 2016 • The IT department detected the intrusion in their servers and stopped the ransomware from spreading by shutting down most of its network operations • The engineers also successfully restored three main clinical systems from backup • This quick and active approach ultimately saved not only the hospital reputation but also the lives of admitted patients, said Ann Nickels, a spokeswoman for the MedStar medical system Source: http://thehackernews.com/2016/04/hospital-ransomware.html
- 22. Slide 22 © First Base Technologies 2016 Defences and Responses Ransomware: All your files now belong to us
- 23. Slide 23 © First Base Technologies 2016 Paying the ransom In the first three months of 2016, attacks cost victims more than $200 million. The total cost in 2015 was $325 million, so we’re going to see much more dismal results as the year goes on. Source: http://www.datto.com/blog/ransomware-attacks-skyrocketing-in-2016 Beware: UltraDeCryptor does not deliver the decryption routines after you pay Source: https://blog.knowbe4.com/ultradecryptor-ransomware-does-not-decrypt-your-files Some vendors offer decryption tools for some ransomware: AVG, Kaspersky, Trend Micro, etc. Source: http://www.thewindowsclub.com/list-ransomware-decryptor-tools
- 24. Slide 24 © First Base Technologies 2016 Defend yourself! 1. Air-gapped backups 2. Backups of cloud data 3. Encrypted backups of key data on write-once media (DVD, Blu-ray) 4. Regular server and database patching 5. Endpoint patching (ref Secunia) 6. Ad blocking software for browsers 7. Secure home networks for employees 8. Regular testing of the kill chain (e.g. phishing) 9. Intensive anti-ransomware training for all staff 10. Keep up to date on the evolution of ransomware
- 25. Slide 25 © First Base Technologies 2016 Peter Wood Chief Executive Officer First Base Technologies LLP peter@firstbase.co.uk http://firstbase.co.uk twitter: @peterwoodx Need more information?
Editor's Notes
- It starts with a pen-testing/attack server searching for potential vulnerable networks to exploit with the help of a publicly-available tool named reGeorg, which is used for tunnelling. Java-based vulnerabilities were also observed to have been utilized, such as CVE-2010-0738 related to outdated JBOSS server applications. It can use other information-stealing malware (Derusbi/Bladabindi) to gather login credentials as well. When it has done so, it will list the stolen credentials into a text file, for example, list.txt, and use this to deploy the malware and its components through a third party tool named psexec.exe through batch files that we detect as Trojan:BAT/Samas.B and Trojan:BAT/Samas.C. One of the batch files that we detect as Trojan:Bat/Samas.B also deletes the shadow files through the vssadmin.exe tool. Trojan:MSIL/Samas.A usually takes the name of delfiletype.exe or sqlsrvtmg1.exe and does the following: Look for certain file extensions that are related to backup files in the system. Make sure they are not being locked up by other processes, otherwise, the trojan terminates such processes. Delete the backup files. Ransom:MSIL/Samas demonstrates typical ransomware behaviour by encrypting files in the system using AES algorithm and renaming the encrypted file with extension encrypted.RSA. It displays the ransom note when it has encrypted the files and will delete itself with the help of a binary in its resource named del.exe.
- It starts with a pen-testing/attack server searching for potential vulnerable networks to exploit with the help of a publicly-available tool named reGeorg, which is used for tunnelling. Java-based vulnerabilities were also observed to have been utilized, such as CVE-2010-0738 related to outdated JBOSS server applications. It can use other information-stealing malware (Derusbi/Bladabindi) to gather login credentials as well. When it has done so, it will list the stolen credentials into a text file, for example, list.txt, and use this to deploy the malware and its components through a third party tool named psexec.exe through batch files that we detect as Trojan:BAT/Samas.B and Trojan:BAT/Samas.C. One of the batch files that we detect as Trojan:Bat/Samas.B also deletes the shadow files through the vssadmin.exe tool. Trojan:MSIL/Samas.A usually takes the name of delfiletype.exe or sqlsrvtmg1.exe and does the following: Look for certain file extensions that are related to backup files in the system. Make sure they are not being locked up by other processes, otherwise, the trojan terminates such processes. Delete the backup files. Ransom:MSIL/Samas demonstrates typical ransomware behaviour by encrypting files in the system using AES algorithm and renaming the encrypted file with extension encrypted.RSA. It displays the ransom note when it has encrypted the files and will delete itself with the help of a binary in its resource named del.exe.