Dealing With The Growing DDoS Threat

Increasingly sophisticated DDoS attacks have become an inevitable part of the cybersecurity landscape, threatening the availability of enterprise services, applications and websites. The scale of DDoS attacks has increased by an order of magnitude, reaching over 1 Tbps in some cases.

The recently-discovered botnet, dubbed “Reaper” or “IoTroop,” appears to be a more powerful strain of Internet of Things (IoT) attack malware than Mirai, the previous holder of the IoT botnet crown.

And while there are no confirmed reports that Reaper has been used to launch an attack, security researchers warn that it may only be a matter of time.

Researchers from Check Point announced their discovery of Reaper on Oct. 19, claiming that it may have already infected “an estimated million organizations” and could potentially “take down the internet.”  The new malware, Check Point wrote, is “evolving and recruiting IoT devices at a far greater pace and with more potential damage than the Mirai botnet of 2016.”

Where Mirai used factory-default or hard-coded usernames and passwords to infiltrate and eventually take control of IoT devices, Reaper exploits known security vulnerabilities across IoT devices makers, such as AVTECH, D-Link, Netgear, Linksys and more, according to KrebsOnSecurity.

The Reaper worm is designed to spread from one infected device to another.

What makes Reaper and other IoT-based attacks particularly scary is their breadth and sophistication. For example, IoT attacks don’t rely on spoofing to create wide attacks, instead, they are real endpoints with real IP addresses, making it more difficult to block each individual device that is sending attack traffic. Additionally, IoT attacks are widely distributed globally and each IP has to be treated differently – an organization can’t just block a network segment or a country’s IP range to defend against it.

And IoT attacks can have wider breath of attacking capabilities than traditional attack strategies. For example, previous huge volume attacks used reflection (such as DNS or NTP) to create volume, meaning thousands of open resolvers (DNS reflection case) would be tricked into generating a huge traffic load. IoT attacks, on the other hand, have a vast swath; millions of IoT devices can each generate individual traffic that can swell into gargantuan attacks – think of it as a wake building into a tidal wave.

So far, there have been no confirmed reports of Reaper being used to carry out an attack, but the potential for DDoS attacks looms, especially considering that Mirai was used to launch some of largest DDoS attacks on record, including attacks up to and exceeding 1 Tbps.

It is essential that organisations are prepared with defence mechanisms to stay clear of sch attacks. Should Reaper take the same track as Mirai and be leveraged to launch IoT-fueled DDoS attacks, it’s important to be protected.

High-performance DDoS detection and mitigation are must-haves in the battle against IoT botnets and the sophisticated multi-vector DDoS attacks they power. Organizations need swift, surgical detection and rapid mitigation to ensure services aren’t disrupted and that legitimate traffic can still get through during wartime.

It is imperative for DDoS defense solutions to understand traffic patterns and behaviors to block anomalous traffic while allowing real user traffic to continue to pass through. Identifying and analyzing threats quickly is also necessary.

And for additional real-time protection, organizations should implement a hybrid DDoS protection model that combines the power of on-premise DDoS defense with cloud capabilities to combat high-volume DDoS attacks.

Another preventative measure is to update your devices. Updating IoT devices with new code and turning off features that involve WAN-based administration can help protect devices from Reaper, should it become active.

While Mirai was primed with a list of default usernames and passwords of devices throughout the internet, Reaper uses a set of exploits seen in various devices, meaning that without any knowledge of a username or password, someone may be able to get in by leveraging one of these exploits.

Failing to update devices and turn off WAN-style features could leave your admin password exposed, regardless of how complex it is.

Bad traffic can be blocked before it can enter the network and wreak havoc by empowering customers to leverage global knowledge to block traffic that is considered malicious to prevent zero-day attacks, block command and control computers from communicating with your network and to cloak your network from known cybercriminal scans.

It works by continuously charting potential threats and intruders. It instantly recognizes and blocks traffic in real-time from known attack sources to protect networks from new and future threats.

(This is a guest post by Sanjai Gangadharan, Regional Director SAARC, A10 Networks)

About Shakthi

I am a Tech Blogger, Disability Activist, Keynote Speaker, Startup Mentor and Digital Branding Consultant. Also a McKinsey Executive Panel Member. Also known as @v_shakthi on twitter. Been around Tech for two decades now.

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