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The Hacker News - Cybersecurity News and Analysis: Memcached UDP Reflection

Over 15,000 Memcached DDoS Attacks Hit 7,100 Sites in Last 10 Days

Over 15,000 Memcached DDoS Attacks Hit 7,100 Sites in Last 10 Days

March 09, 2018Swati Khandelwal
Memcached reflections that recently fueled two most largest amplification DDoS attacks in the history have also helped other cybercriminals launch nearly 15,000 cyber attacks against 7,131 unique targets in last ten days, a new report revealed. Chinese Qihoo 360's Netlab, whose global DDoS monitoring service ' DDosMon ' initially spotted the Memcached-based DDoS attacks, has published a blog post detailing some new statistics about the victims and sources of these attacks. The list of famous online services and websites which were hit by massive DDoS attacks since 24th February includes Google, Amazon, QQ.com, 360.com, PlayStation, OVH Hosting, VirusTotal, Comodo, GitHub ( 1.35 Tbps attack ), Royal Bank, Minecraft and RockStar games, Avast, Kaspersky, PornHub, Epoch Times newspaper, and Pinterest. Overall, the victims are mainly based in the United States, China, Hong Kong, South Korea, Brazil, France, Germany, the United Kingdom, Canada, and the Netherlands.
'Kill Switch' to Mitigate Memcached DDoS Attacks — Flush 'Em All

'Kill Switch' to Mitigate Memcached DDoS Attacks — Flush 'Em All

March 07, 2018Swati Khandelwal
Security researchers have discovered a "kill switch" that could help companies protect their websites under massive DDoS attack launched using vulnerable Memcached servers. Massive Memcached reflection DDoS attacks with an unprecedented amplification factor of 50,000 recently resulted in some of the largest DDoS attacks in history . To make matter even worse, someone released proof-of-concept (PoC) exploit code for Memcached amplification attack yesterday, making it easier for even script kiddies to launch massive cyber attacks. Despite multiple warnings, more than 12,000 vulnerable Memcached servers with UDP support enabled are still accessible on the Internet, which could fuel more cyber attacks soon. However, the good news is that researchers from Corero Network Security found a technique using which DDoS victims can send back a simple command, i.e., "shutdown\r\n", or "flush_all\r\n", in a loop to the attacking Memcached servers in order
Memcached DDoS Exploit Code and List of 17,000 Vulnerable Servers Released

Memcached DDoS Exploit Code and List of 17,000 Vulnerable Servers Released

March 07, 2018Swati Khandelwal
Two separate proofs-of-concept (PoC) exploit code for Memcached amplification attack have been released online that could allow even script-kiddies to launch massive DDoS attacks using UDP reflections easily. The first DDoS tool is written in C programming language and works with a pre-compiled list of vulnerable Memcached servers. Bonus—its description already includes a list of nearly 17,000 potential vulnerable Memcached servers left exposed on the Internet. Whereas, the second Memcached DDoS attack tool is written in Python that uses Shodan search engine API to obtain a fresh list of vulnerable Memcached servers and then sends spoofed source UDP packets to each server. Last week we saw two record-breaking DDoS attacks— 1.35 Tbps hit Github and 1.7 Tbps attack against an unnamed US-based company—which were carried out using a technique called amplification/reflection attack. For those unaware, Memcached-based amplification/reflection attack amplifies bandwidth of th
1.7 Tbps DDoS Attack — ​Memcached UDP Reflections Set New Record

1.7 Tbps DDoS Attack — ​Memcached UDP Reflections Set New Record

March 06, 2018Mohit Kumar
The bar has been raised. As more amplified attacks were expected following the record-breaking 1.35 Tbps Github DDoS attack , someone has just set a new record after only four days — 1.7 Tbps DDoS attack. Network security and monitoring company Arbor Networks claims that its ATLAS global traffic and DDoS threat data system have recorded a 1.7Tbps reflection/amplification attack against one of its unnamed US-based customer's website. Similar to the last week's DDoS attack on GitHub, the massive bandwidth of the latest attack was amplified by a factor of 51,000 using thousands of misconfigured Memcached servers exposed on the Internet. Memcached, a popular open source distributed memory caching system, came into news earlier last week when researchers detailed how attackers could abuse it to launch amplification DDoS attack by sending a forged request to the targeted Memcached server on port 11211 using a spoofed IP address that matches the victim's IP. A few b
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