Threat Intelligence

Routing Redundancy: How Much Is Enough?

Internet connectivity is a good thing. Many of us depend on it for everything from our livelihoods to our entertainment. However, the Internet is very fragile and even the The New York Times is worried about it. But they're primarily concerned with overloads that can occur when everyone on the planet does the same thing at roughly the same time, such as surfing for news about Michael Jackson. Unfortunately, we will never avoid all such scenarios. Physical systems are designed around average and typical peak loads, not around extremely high loads associated with very unlikely events. Who would pay for that? more

Understanding the Modern DDoS Threat

The breadth of cyber threats that an organization must engage with and combat seemingly change on a daily basis. Each new technology, vulnerability or exploit vector results in a new threat that must be protected against. Meanwhile some forms of attack never appear to age -- they remain a threat to business continuity despite years of advances in defensive strategy. One particularly insidious and never-ending threat is that of the Distributed Denial of Service (DDoS) attack. more

A Look at the Current State of DNSSEC in the Wild

The DNS system is, unfortunately, rife with holes like Swiss Cheese; man-in-the-middle attacks can easily negate the operation of TLS and website security. To resolve these problems, the IETF and the DNS community standardized a set of cryptographic extensions to cryptographically sign all DNS records... Now that these standards are in place, how heavily is DNSSEC being used in the wild? How much safer are we from man-in-the-middle attacks against TLS and other transport encryption mechanisms? more

We Have a Paradigm for Surveillance That’s Broken, Fit Only for the Analogue Past

As each day brings new revelations about surveillance online, we are starting to see increasing activity in national legislatures intended either to establish more control over what the security services can do to their nationals (in countries like the US), or to limit access by foreign secret services to the personal information of their citizens (countries like Brazil). Unfortunately, neither of these approaches address the underlying problem: we have a paradigm for surveillance that's fit for the analogue past, not the digital present, let alone the future. more

Military Asserts Rights to Return Cyber Attacks

The Washington Post had a good article up yesterday capturing comments issued by the United States military that it has the right to return fire when it comes to cyber attacks... This is an interesting point of view, and it extends from the United States's policy that if it is attacked using conventional weapons, it reserves the right to counter respond in kind. This has been a long accept precept governing US foreign military policy for generations. Yet cyber attacks are different for a couple of reasons... more

Conclusion: SLD Blocking Is Too Risky Without TLD Rollback (Part 4 of 4)

ICANN's second level domain (SLD) blocking proposal includes a provision that a party may demonstrate that an SLD not in the initial sample set could cause "severe harm," and that SLD can potentially be blocked for a certain period of time. The extent to which that provision would need to be exercised remains to be determined. However, given the concerns outlined in Part 2 and Part 3 of this series, it seems likely that there could be many additions (and deletions!) from the blocked list given the lack of correlation between the DITL data and actual at-risk queries. more

Recommendations for Adding Cybersecurity Intelligence to the Smart Grid

Over the last few years, there has been an increased effort to modernize the U.S. electric grid. Building a "Smart Grid" has been central in the effort to help utilities better manage their resources, minimize power outages and reduce energy consumption. However, adding more electronic devices and sensors to the grid's network has made it a prime target of cyberattacks, like Distributed Denial of Service (DDoS) attacks, which if successful, could cause wide-spread disruption of services affecting many other sectors. more

.trust Technical Policy Launch

Whenever I examine the technical elements of the various Internet security certifications and standards that organisations are clamouring to achieve compliance against, I can't help but feel that in too many cases those businesses are prioritising the wrong things and wasting valuable resources. They may as well be following a WWI field guide on how to keep cavalry horses nourished and bayonets polished in a world of stealth aircraft and dirty bombs. more

Biggest Botnet Takedown to Date

Yesterday law enforcement officials arrested 6 people and charged them with running a massive internet fraud ring. Over 4 million PCs were part of the botnet. According to the FBI, "the cyber ring used a class of malware called DNSChanger to infect approximately 4 million computers in more than 100 countries. There were about 500,000 infections in the U.S., including computers belonging to individuals, businesses, and government agencies such as NASA." more

Major Flaw Found in WannaCry Raises Questions on Whether it was Really a Ransomware

An extensive analysis of WannaCry seems to indicate attackers would be unable to determine which users have paid the ransom and they cannot decrypt on a per-user basis. more

Oil and Gas Cyber Security Forum

A reader recently brought to my attention an upcoming conference in London in the UK -- The Oil and Gas Cyber Security Forum. Here's a little blurb: "Despite investments into state of the art technology, a majority of the oil and gas industry remain blissfully unaware of the vulnerabilities, threats and capability of a malicious cyber attack on control systems..." I bring this up because it is relevant to the trends in cyber security that we see this year - that of the Advanced Persistent Threat. more

FBI, Department of Homeland Security Issue Warning About a North Korean Trojan Malware Variant

The US Department of Homeland Security (DHS) and the Federal Bureau of Investigation (FBI) this week issued a malware analysis report on Trojan malware variants linked to the North Korean government. more

Greylisting Still Works - Part I

Greylisting is a hoary technique for rejecting spam sent by botnets and other poorly written spamware. When a mail server receives an attempt to deliver mail from a hitherto unseen sending host IP address, it rejects the message with a "soft fail" error which tells the sender to try again later. Real mail software does try again, at which point you note that the host knows how to retry and you don't greylist mail from that IP again. more

RIPE 75: Imprssions of the Meeting

RIPE held its 75th meeting in Dubai in mid-October. As usual, there was a diverse set of presentations covering a broad range of activities that are taking place on today's Internet. The topics include issues relating to network operations, regulatory policies, peering and interconnection, communications practices within data centers, IPv6, the DNS, routing and network measurement. If that's not enough, the topic of the Internet of Things has been added as a Working Group in the RIPE pantheon. If you add address policy, database and RIPE services to the mix, you get a pretty packed five days with topics that would appeal to most Internet folks. more

Cybersecurity Considerations in the Work-From-Home Era

Verisign is deeply committed to protecting our critical internet infrastructure from potential cybersecurity threats, and to keeping up to date on the changing cyber landscape. Over the years, cybercriminals have grown more sophisticated, adapting to changing business practices and diversifying their approaches in non-traditional ways. We have seen security threats continue to evolve in 2020, as many businesses have shifted to a work from home posture due to the COVID-19 pandemic. more