DDoS Attack

The Internet of Things: When Sci-Fi Becomes Reality

In my last blog post I shared some of the general security challenges that come with the Internet of Things (IoT). In this post, I will focus on one particular security risk: distributed denial of service (DDoS) attacks. Even before the age of IoT, DDoS attacks have been turning multitudes of computers into botnets, attacking a single target and causing denial of services for the target's users. By "multitudes" we can be talking about thousands or even millions of victim devices. Now add IoT into the equation... more

Understanding the Threat Landscape: Basic Methodologies for Tracking Attack Campaigns

The indicators of compromise (IOCs) outlined in my last blog post can be used as a baseline for developing intrusion sets and tracking attack campaigns and threat actors. When launching an attack, threat actors use a variety of vectors and infrastructure, which Verisign iDefense analysts -- as well as analysts across the cybersecurity community -- correlate to group attacks, tracking actors and determining attack methods. more

Understanding the Threat Landscape: Indicators of Compromise (IOCs)

I previously provided a brief overview of how Verisign iDefense characterizes threat actors and their motivations through adversarial analysis. Not only do security professionals need to be aware of the kinds of actors they are up against, but they should also be aware of the tactical data fundamentals associated with cyber-attacks most commonly referred to as indicators of compromise (IOCs). Understanding the different types of tactical IOCs can allow for quick detection of a breach... more

IPv6 Adoption Brings New Security Risks

Although IPv6 DDoS attacks are not yet a common occurrence, there are indications that malicious actors have started testing and researching IPv6 based DDoS attack methods. more

M3AAWG & i2Coalition Collaborate on Best Practices on Anti-Abuse in Hosting & Cloud Environments

I am excited to announce the recent release of the industry first Best Common Practices document for Cloud and Hosting providers for addressing abuse issues that was created by M3AAWG and the i2Coalition. M3AAWG has been collaborating with the Best Practices Working Group of the i2Coalition over the past 2 years to discuss ways to solve malicious activity within hosting and cloud ecosystems.  more

DNS-Based DDoS: Diverse Options for Attackers

Denial of service attacks have been around since the Internet was commercialized and some of the largest attacks ever launched relied on DNS, making headlines. But every day a barrage of smaller DNS-based attacks take down targets and severely stress the DNS ecosystem. Although DNS servers are not usually the target of attacks they are often disrupted so attention from operation teams is required. There is no indication the problem is going away and attackers continue to innovate. more

China Accused of ‘Weaponizing’ Global Internet Users to Launch DDoS Attack

Activists battling internet censorship in China are reporting that they have proof of a massive online assault on their websites by the Chinese authorities. The attack, which began last Thursday, targeted two GitHub projects designed to combat censorship in China: GreatFire and CN-NYTimes, a Chinese language version of the New York Times. more

Notes from NANOG 63

The following is a selected summary of the recent NANOG 63 meeting, held in early February, with some personal views and opinions thrown in! ...One view of the IETF's positioning is that as a technology standardisation venue, the immediate circle of engagement in IETF activities is the producers of equipment and applications, and the common objective is interoperability. more

A Cancerous Computer Fraud and Misuse Act

As I read through multiple postings covering the proposed Computer Fraud and Misuse Act, such as the ever-insightful writing of Rob Graham in his Obama's War on Hackers or the EFF's analysis, and the deluge of Facebook discussion threads where dozens of my security-minded friends shriek at the damage passing such an act would bring to our industry, I can't but help myself think that surely it's an early April Fools joke. more

CircleID’s Top 10 Posts of 2014

Here we are with CircleID's annual roundup of top ten most popular posts featured during 2014 (based on overall readership). Congratulations to all the participants whose posts reached top readership and best wishes for 2015. more

Six Approaches to Creating an Enterprise Cyber Intelligence Program

As few as seven years ago, cyber-threat intelligence was the purview of a small handful of practitioners, limited mostly to only the best-resourced organizations - primarily financial institutions that faced large financial losses due to cyber crime - and defense and intelligence agencies involved in computer network operations. Fast forward to today, and just about every business, large and small, is dependent on the Internet in some way for day-to-day operations, making cyber intelligence a critical component of a successful business plan. more

Google Announces Project Zero to Secure the Internet

Google today revealed a new initiative, named Project Zero, with the objective to "significantly reduce the number of people harmed by targeted attacks." To carry out the project, Google is recruiting a team of experienced hackers - "practically-minded security researchers" - to contribute 100% of their time toward improving security across the Internet. more

Painting Ourselves Into a Corner with Path MTU Discovery

In Tony Li's article on path MTU discovery we see this text: "The next attempt to solve the MTU problem has been Packetization Layer Path MTU Discovery (PLPMTUD). Rather than depending on ICMP messaging, in this approach, the transport layer depends on packet loss to determine that the packet was too big for the network. Heuristics are used to differentiate between MTU problems and congestion. Obviously, this technique is only practical for protocols where the source can determine that there has been packet loss. Unidirectional, unacknowledged transfers, typically using UDP, would not be able to use this mechanism. To date, PLPMTUD hasn't demonstrated a significant improvement in the situation." Tony's article is (as usual) quite readable and useful, but my specific concern here is DNS... more

Do I need DDoS protection? A Realistic Look at the Decision Process

There has been a recent spate of well publicised Distributed Denial of Service (DDoS) attacks that bring websites down and render them useless, including Evernote and most recently Feedly. In light of this, here are some comments and tips to help companies evaluate and prepare not to be held for ransom or suffer lost reputation and sales as a result. more

Popular RSS Reader Feedly Suffers Back to Back DDoS Attacks, Held for Ransom

Popular RSS reader Feedly has been hit by major distributed denial of service (DDoS) attacks beginning 2:04am PST on Wednesday causing the service to be completely down for several hours two days in a row. (Second attack still undergoing as of the time of this post.) more