Bitsquatting An introduction Nigel Roberts Chief Xenobehaviourist - PowerPoint PPT Presentation

Apr 30, 2023 •102 likes •231 views

Bitsquatting An introduction Nigel Roberts Chief Xenobehaviourist CHANNELISLES.NET nigel@roberts.co.uk @nigelrbrts http://nigel.je http://roberts.gg What is bitsquatting Typosquatting is a subset of cybersquatting: bitsquatting is

Bitsquatting – An introduction Nigel Roberts Chief Xenobehaviourist CHANNELISLES.NET nigel@roberts.co.uk @nigelrbrts http://nigel.je http://roberts.gg
What is bitsquatting ● “Typosquatting is a subset of cybersquatting: bitsquatting is a subset of typosquatting.” - Arends ● In bitsquatting: – a squatted identifier ● differs from the intended victim ● by one bit
Why do we care? ● It turns out – That, in in some circumstances – traffic addressed for a victim ● can be intercepted by a attacker ● by utilising an address identifier ● that differs – by one bit – from the victim's principal address
Bitsquatting ● First described in 2011 ● by Artem Dinaburg of Raytheon. – Bitsquatting: DNS Hijacking without exploitation http://gg.gg/bs-dinaburg
What is the science? ● Working Hypothesis – Hardware not humans – Devices make single bit errors – which ● In the case of certain identifiers ● to which there is a very large quantity of traffic ● are statistically significant e.g www.facebook.com
What's the cause? ● Speculation – Heat – Poor quality memory – Background radiation (e.g. radon) and/or nuclear explosions – Cosmic rays – Aliens playing Halo 2 with live ammunition.
Empirical evidence ● Is there any evidence for bitsquatting? – Yes ● described by Duane Wessels of Raytheon – Evidence of Bitsquatting In COM/NET Queries http://gg.gg/bs-wessels
Implications ● What are the implications? ● Investigated by Jaeson Schulz of Cisco – Examination of the bitsquatting attack surface http://gg.gg/bs-schulz
Detection of enemy activity ● The qualified question. ● Is it being used in the wild by hostile forces? ● If so, how do we detect it?
The contention: ● “Domain registries and registrars have unique tools available to them to investigate and detect whether bit-squatting is being actively pursued by bad guys” - Roberts ● Corollary: There are other good guys able to do this too, perhaps with different tools. – Google – Who else?
How? ● Easy to make a list of all bitsquatting collisions of all registered domains. ● SMOP ● But there's a lot of them – Mostly either legitimate, or “ordinary typosquatting” ● Need to reduce them further – Various possible tools to do this ● DNS data, registry data (WHOIS), IP registry data (RIPE/ARIN etc), MD5 hash of spidered data – Are there any characteristics of domain names and registration that give us extra information?
Conclusion ● “You have more work to do” – Houston, Floyd, Carnicero, Tennant (Spy the Lie)

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