DDoS Attack

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U.S. CERT Issues Alert on DNS Amplification Attacks

Neil Schwartzman writes to report that U.S. Cert issued Alert TA13-088A on Friday March 29, 2013. "It is a solid how-to guide to test for, and remediate DNS configurations that can be used for Distributed Denial of Service attacks." more

The Internet Needs a Security and Performance Upgrade

Many of you will have seen news stories that explained what was going on: a huge DDoS attack on the infrastructure of Dyn had taken down access to many large websites like Twitter. A great deal of digital ink has since been spilled in the mainstream press on the insecurity of the Internet of Things, as a botnet of webcams was being used. Here are some additional issues that might get missed in the resulting discussion. more

New Research Indicates Nearly 80% of Top US Energy Companies Are at Serious Risk for Cyberattacks

In light of the Biden administration's recent efforts in protecting critical infrastructure from cyber threats, new research from CSC indicates that a majority of the top energy companies in the U.S. are vulnerable to attack due to shortcomings in their online operations. Specifically, these organizations are vulnerable to domain name and domain name system (DNS) hijacking and phishing attacks based on their lack of effective domain security. more

South Korean Banks Receive DDoS Threat from Hacker Group, Record Ransomware Payment Demanded

Various sources including South Korea's news agency Yonhap are reporting that a hacker group has threatened to launch a DDoS attack against seven South Korean banks unless they pay about 360 million won (US$315,000) in bitcoin. more

No One is Immune: Qatar Crisis Started by a Targeted Poli-Cyber Attack

The Qatar Crisis started with a targeted Poli-Cyber hack of an unprecedented nature. Its shockwaves and repercussions continue to alter political and business fortunes, directions and paradigms not only in the Gulf region but globally. Almost everyone around the world is now aware of the this crisis that started early June. By mid July a Washington Post report cited US intelligence officials that the UAE orchestrated hacking of Qatari government sites, sparking regional upheaval that started it all. more

1.3 Tbps DDoS Attack Against GitHub is Largest Attack Seen to Date, Says Akamai

According to Akamai, the incident was the largest attack seen to date, "more than twice the size of the September 2016 attacks that announced the Mirai botnet and possibly the largest DDoS attack publicly disclosed." more

Permanent Denial-of-Service Attacks on the Rise, Incidents Involve Hardware-Damaging Assaults

Also known loosely as "phlashing" in some circles, Permanent Denial-of-Service (PDoS) is an increasing popular form of cyberattack that damages a system so badly that it requires replacement or reinstallation of hardware. more

Cyber-Terrorism Rising, Existing Cyber-Security Strategies Failing, What Are Decision Makers to Do?

While conventional cyber attacks are evolving at breakneck speed, the world is witnessing the rise of a new generation of political, ideological, religious, terror and destruction motivated "Poli-Cyber™" threats. These are attacks perpetrated or inspired by extremists' groups such as ISIS/Daesh, rogue states, national intelligence services and their proxies. They are breaching organizations and governments daily, and no one is immune. more

Nitol and 3322.org Takedown by Microsoft

Reading this morning's blog from Microsoft about "Operation b70" left me wondering a lot of things. Most analysts within the botnet field are more than familiar with 3322.org - a free dynamic DNS provider based in China known to be unresponsive to abuse notifications and a popular home to domain names used extensively for malicious purposes - and its links to several botnets around the world. more

Black Frog: Next Generation Botnet, No Generation Spam Fighting

Black Frog -- a new effort to continue the SO-CALLED Blue Security fight against spammers. A botnet, a crime, a stupid idea that I wish would have worked -- News items on Black Frog. Blue Frog by Blue Security was a good effort. Why? Because they wanted to "get spammers back". They withstood tremendous DDoS attacks and abuse reports, getting kicked from ISP after ISP. ...The road to hell is filled with good intentions. Theirs was golden, but they got to hell, quite literally, non-the-less. ...When Blue Security went down, some of us made a bet as to when two bored guys sitting and planning their millions in some café would show up, with Blue Security's business plan minus the DDoS factor. Well -- they just did. more

Blocking a DDoS Upstream

In the first post on DDoS, I considered some mechanisms to disperse an attack across multiple edges (I actually plan to return to this topic with further thoughts in a future post). The second post considered some of the ways you can scrub DDoS traffic. This post is going to complete the basic lineup of reacting to DDoS attacks by considering how to block an attack before it hits your network -- upstream. more

Mitigating DDoS

Your first line of defense to any DDoS, at least on the network side, should be to disperse the traffic across as many resources as you can. Basic math implies that if you have fifteen entry points, and each entry point is capable of supporting 10g of traffic, then you should be able to simply absorb a 100g DDoS attack while still leaving 50g of overhead for real traffic... Dispersing a DDoS in this way may impact performance -- but taking bandwidth and resources down is almost always the wrong way to react to a DDoS attack. But what if you cannot, for some reason, disperse the attack? more

A Noteworthy Report on Fast Flux Hosting

This very interesting document was released by ICANN's Generic Names Supporting Organization (GNSO) for public comment yesterday. And it asks some fundamental questions while at the same time pointing to sources such as the Honeynet Alliance's reports on fast flux. more

Maintaining Security and Stability in the Internet Ecosystem

DDoS attacks, phishing scams and malware. We battle these dark forces every day - and every day they get more sophisticated. But what worries me isn't just keeping up with them, it is keeping up with the sheer volume of devices and data that these forces can enlist in an attack. That's why we as an industry need to come together and share best practices - at the ICANN community, at the IETF and elsewhere - so collectively we are ready for the future. 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

Industry Updates

Alleviating BlackEnergy-Enabled DDoS Attacks

Meet the Speakers of the Cyber Threat Mitigation Webinar (by IPXO)

QAnon and 8Chan Digital Footprint Analysis and Investigation Expansion

How to Maintain Your Website’s Network Reachability with DNS Lookup Solutions

Under the Radar DDoS Attacks Increase by 158 Percent in Q2, 2019 Compared to the Same Time Last Year

Neustar Research Shows Large Attacks Growing as Multi-Vector Exploits Increasingly Become the Norm

Neustar to Acquire Verisign’s Security Services Customer Contracts

Q2 2018 DDoS Trends Report: 52 Percent of Attacks Employed Multiple Attack Types

Q1 2018 DDoS Trends Report: 58 Percent of Attacks Employed Multiple Attack Types

Q4 2017 DDoS Trends Report: Financial Sector Experienced 40 Percent of Attacks

Attacks Decrease by 23 Percent in 1st Quarter While Peak Attack Sizes Increase: DDoS Trends Report

Verisign Releases Q4 2016 DDoS Trends Report: 167% Increase in Average Peak Attack from 2015 to 2016

Verisign Q3 2016 DDoS Trends Report: User Datagram Protocol (UDP) Flood Attacks Continue to Dominate

Don’t Gamble With Your DNS

Defending Against Layer 7 DDoS Attacks