Dutch security firm Fox-IT deserves praise for being open about an attack on its client network. There are some important lessons to be learned about DNS security from its post-mortem.
Every company will, sooner or later, get hacked and we should judge them by how they respond. With that in mind, Fox-IT, which writes in great detail about how a DNS hijack was… https://www.virusbulletin.com/blog/2017/12/attack-fox-it-shows-how-dns-hijack-can-break-multiple-layers-security/
At VB2017 in Madrid, Cisco Umbrella (OpenDNS) researchers Dhia Mahjoub and David Rodriguez presented a new approach to detecting infected machines using graphs to detect botnet traffic at scale. Today we publish both Dhia and David's paper and the recordi…
Malicious Internet traffic, such as botnet C&C traffic, is easily recognized if it uses known bad domain names, or known bad IP addresses. This is why botnets constantly change… https://www.virusbulletin.com/blog/2017/11/vb2017-paper-beyond-lexical-and-pdns-using-signals-graphs-uncover-online-threats-scale/
We preview the VB2017 paper by Dhia Mahjoub (OpenDNS) and Jason Passwaters (Intel471) who combine an actor-centric and a network-centric approach to analysing bulletproof hosting operations.
Running a cybercriminal enterprise isn't all that easy. Try, for instance, setting up a site hosting malware and you'll find that sooner or later the provider will suspend your… https://www.virusbulletin.com/blog/2017/09/vb2017-preview-bph-exposed-rbn-never-left-they-just-adapted-and-evolved-did-you/
At VB2016, Splunk researchers Kathy Wang and Steve Brant presented a Splunk app that can be used to locally collect passive DNS data. A recording of their presentation is now available to view on our YouTube channel.
Anyone who has ever investigated a malware or phishing attack will know the feeling: "if only I could find out what IP address this domain pointed to when the attack took place".… https://www.virusbulletin.com/blog/2017/may/vb2016-paper-building-local-passivedns-capabilityfor-malware-incident-response/
We'd better get used to a world where malicious traffic is encrypted too.
We'd better get used to a world where malicious traffic is encrypted too. According to some people, myself included, Let's Encrypt was one of the best things that happened to the… https://www.virusbulletin.com/blog/2016/01/let-s-encrypt-certificate-used-malversiting/
Thibault Reuille and Dhia Mahjoub use DNS data to look for clusters of malicious domains.
Thibault Reuille and Dhia Mahjoub use DNS data to look for clusters of malicious domains.Since the close of the VB2014 conference in Seattle in October, we have been sharing VB2014… https://www.virusbulletin.com/blog/2015/01/paper-design-discover-security-analytics-3d-visualization-engine/
Dhia Mahjoub explains how the topology of the AS graph can be used to uncover hotspots of maliciousness.
Dhia Mahjoub explains how the topology of the AS graph can be used to uncover hotspots of maliciousness.Over the next few months, we will be sharing VB2014 conference papers as… https://www.virusbulletin.com/blog/2014/11/paper-sweeping-ip-space-hunt-evil-internet/
Call to use end-to-end encryption and to deploy DNSSEC.
Call to use end-to-end encryption and to deploy DNSSEC.DNS is sometimes called 'the phone book of the Internet'. If true, then it is a phone book that makes it relatively easy to… https://www.virusbulletin.com/blog/2014/09/dns-cache-poisoning-used-steal-emails/
Unsophisticated scam shows the high level of commoditization of today's cybercrime.
Unsophisticated scam shows the high level of commoditization of today's cybercrime. A case of browser-based ransomware, that is currently using social engineering tactics in an… https://www.virusbulletin.com/blog/2014/01/browser-based-ransomware-uses-scare-tactics-extort-money/
Open DNS resolvers instrumental in many DDoS attacks.
Open DNS resolvers instrumental in many DDoS attacks. At the Cyber Security Summit in London, Richard Cox, CIO of DNS blacklist provider Spamhaus, called on the UK government to… https://www.virusbulletin.com/blog/2013/11/spamhaus-cio-calls-those-running-open-dns-resolvers-be-fined/
Name servers unable to distinguish faulty from rogue responses.
Name servers unable to distinguish faulty from rogue responses. A glitch at VeriSign yesterday led to DNSSEC-aware name servers being unable to verify responses on the .gov… https://www.virusbulletin.com/blog/2013/08/dnssec-glitch-causes-gov-sites-become-inaccessible/
DNS caching causes attack to have a long tail.
DNS caching causes attack to have a long tail. Yesterday, visitors to thousands of Dutch websites were served an 'under construction' page that, through a hidden iframe, was… https://www.virusbulletin.com/blog/2013/08/thousands-websites-affected-nameserver-hijack-redirecting-visitors-malware/
Security at registrars may be weak link.
Security at registrars may be weak link. A hacktivist group has managed to redirect the traffic of two popular websites by hijacking their DNS settings, researchers at Internet… https://www.virusbulletin.com/blog/2012/01/hacktivists-hijack-dns-popular-websites/
DNSBL users advised to avoid those lists that charge for delisting.
DNSBL users advised to avoid those lists that charge for delisting. A new RFC document has been published that describes the best operational practices for the use of DNS-based… https://www.virusbulletin.com/blog/2012/01/new-rfc-describes-best-practices-running-dns-based-lists/
Millions made through 'DNSChanger' malware.
Millions made through 'DNSChanger' malware. Six Estonian nationals have been arrested for taking part in a cybercrime ring that made money through DNS-changing malware that had… https://www.virusbulletin.com/blog/2011/11/largest-takedown-ever-sees-six-arrested/
ISP employee suspected of changing DNS cache.
ISP employee suspected of changing DNS cache. Millions of Internet users in Brazil may have been exposed to malware after the DNS caches of their ISPs were modified to redirect… https://www.virusbulletin.com/blog/2011/11/dns-poisoning-attack-targeting-brazilian-customers/
Servers also used for DoS attack on security journalist's site.
Servers also used for DoS attack on security journalist's site. More than a thousand websites pushing spamvertised pharmaceuticals have been found to be using name servers on… https://www.virusbulletin.com/blog/2010/10/microsoft-s-machines-hijacked-spammers/
Trend false alert cripples users' systems, Sophos sites taken out by DNS mixup.
Trend false alert cripples users' systems, Sophos sites taken out by DNS mixup. Two of the larger security firms, Trend Micro and Sophos, had a busy weekend cleaning up after… https://www.virusbulletin.com/blog/2008/09/tough-weekend-av-giants-fps-and-dns-issues-hit/
Slow patchers targeted by sophisticated attacks.
Slow patchers targeted by sophisticated attacks. The serious vulnerability in the implementation of DNS systems has been targeted by malicious attacks, as security watchers have… https://www.virusbulletin.com/blog/2008/08/dns-flaw-exploitation-danger-growing/
Nothing marked critical, but some very important patches issued.
Nothing marked critical, but some very important patches issued.Microsoft's latest 'Patch Tuesday' round of security updates for once contains no bulletins marked as 'critical',… https://www.virusbulletin.com/blog/2008/07/patch-tuesday-sees-serious-dns-flaws-fixed/