Threat Intelligence

Peering into Fast Flux Botnet Activity

Together with Thorsten Holz, I recently published a paper on fast flux botnet behaviors, "As the Net Churns: Fast-Flux Botnet Observations," based on data we gathered in our ATLAS platform. Fast flux service networks utilize botnets to distribute the web servers to the infected PCs... One of the most well known fast flux botnets has been the Storm Worm botnet, which uses the zombies to spam, send out new enticements to infect users, and to host the malicious website which delivers the malcode. more

Starting a New Conversation on Cybersecurity

The cybersecurity debate can be highly confusing at times. There is perhaps an analogy to be made between "Cybersecurity" and "The Economy". We all want to fix the economy but making progress is not an easy task. As soon as you are beyond that statement you notice that there is a lot of nuance. Issues like trust, influence, actors, and affectivity all come to play when you want to fix the Economy. The cybersecurity discourse has similar features. more

Twitter Taken Down by DDoS Attack, Company Confirms

The Twitter micro-blogging service was knocked offline this morning for several hours as a result of a denial of service attack (DDoS). Twitter has confirmed and reported the attack in a post on its official blog earlier today: "We are defending against this [DDos] attack now and will continue to update our status blog as we continue to defend and later investigate." The company later reported that the service as been resumed but they are still continuing to defend against and recover from this attack. No further updates have been provided yet. more

What Should PGP Look Like?

Those who care about security and usability - that is, those who care about security in the real world - have long known that PGP isn't usable by most people. It's not just a lack of user-friendliness, it's downright user hostile. Nor is modern professional crypto any better. What should be done? How should crypto in general, and PGP in particular, appear to the user? I don't claim to know, but let me pose a few questions. more

Moving DNSSEC Forward: Help for Registries, Registrars, ISPs/Hosting, Enterprises, and Name Owners

DNSSEC adoption has been slow, but is now picking up speed, thanks to organizations leading the way. ... While some registries have already signed, some have announced plans to sign and others are still trying to figure out their plan. Either way, DNSSEC is here. How can we make DNSSEC adoption quicker and easier not only for the registry but for individual name owners? more

Cisco Issues Hight Alert on IPv6 Vulnerability, Says It Affects Both Cisco and Other Products

Cisco today released a high-level alert warning about a vulnerability in IPv6 packet processing functions of multiple Cisco products that could allow an unauthenticated, remote attacker to cause an affected device to stop processing IPv6 traffic, leading to a denial of service (DoS) condition on the device. more

Verisign Expands MANRS Relationship to Strengthen Global Routing Security

Verisign has been involved with an initiative known as Mutually Agreed Norms for Routing Security, or MANRS, since its inception. MANRS, which is coordinated by the Internet Society, focuses on strengthening the security and resiliency of IP networks throughout the world by identifying and providing best practices for mitigating common routing security threats. MANRS began as a collaboration among network operators and internet exchange providers, with Verisign formally becoming a participant in its Network Operator Program in 2017. more

Comments on the National Strategy for Trusted Identities in Cyberspace

The White House has recently released a draft of the National Strategy for Trusted Identities in Cyberspace. Some of its ideas are good and some are bad. However, I fear it will be a large effort that will do little, and will pose a threat to our privacy. As I've written elsewhere, I may be willing to sacrifice some privacy to help the government protect the nation; I'm not willing to do so to help private companies track me when it's quite useless as a defense. more

Phishers Increasingly Targeting SaaS and Webmail Services, APWG Reports

According to the latest report from Anti-Phishing Working Group (APWG) while the total number of conventional, spam-based phishing campaigns declined in 2018, users of software-as-a-service (SaaS) systems and webmail services are increasingly targeted. more

Let’s Be Careful Out There: Bogus Windows Domains

Last week, my colleagues over at Sunbelt Software discovered a bogus Windows domain being registered earlier this month (where the "w" in "windows" is actually two "v"s). Today, I've been alerted to the fact that are several additional Windows domains which have registered where the "w"s have been also been replaced with "v"s... more

Prediction Methods for Crime

There's a new sheriff in town and he's riding the horse of "predictive policing". Back in July the Santa Cruz Police Department began deploying police officers to places where crime is likely to occur in the future -- making use of new predictive modeling programs that are designed to provide daily forecasts of crime hotspots -- thereby allowing the Department to preempt more serious crimes before they occurred. In essence, this is another physical-world application of machine learning and clustering technologies -- applied to preempting a criminal problem. In the cyber-world we've been applying these techniques for a number of years with great success. more

The Future of Cyber Warfare

Every now and then I get emails from readers of my blog. I mostly reply to them in private, but I recently got one question where I thought my reply might be of general interest. I took the liberty of editing the question somewhat, but in essence it was: "If you have any insight you can share with my class on cyber warfare and security, I would be delighted on hearing it." In general, I think that it's an obvious conclusion that both offensive and defensive actions with regard to national telecommunications infrastructure is becoming an integral part of a nations security assessments.... more

Security is a System Property

There's lots of security advice in the press: keep your systems patched, use a password manager, don't click on links in email, etc. But there's one thing these adages omit: an attacker who is targeting you, rather than whoever falls for the phishing email, won't be stopped by one defensive measure. Rather, they'll go after the weakest part of your defenses. You have to protect everything -- including things you hadn't realized were relevant. more

Unexpected Effects of the 2018 Root Zone KSK Rollover

March 22, 2019, saw the completion of the final important step in the Key Signing Key (KSK) rollover - a process which began about a year and half ago. What may be less well known is that post rollover, and until just a couple days ago, Verisign was receiving a dramatically increasing number of root DNSKEY queries, to the tune of 75 times higher than previously observed, and accounting for ~7 percent of all transactions at the root servers we operate. more

Israeli Officials Dispute Claims of Stuxnet’s Joint US/Israel Effort

A few weeks ago, the New York Times published an article saying that the Stuxnet worm, which infected a large number of Iran's nuclear power plants, was a joint effort between the United States and Israel. The program began under former president George W. Bush and continued under President Obama. Last month, the Washington Post ran an article saying that the US and Israel collaborated in a joint effort to develop Flame and that work included Stuxnet. more