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Read more on how UPnP compares to Bonjour. When a new device (like your laptop) joins the network, it can query the local network for specific devices, like internet gateways, audio systems, TVs, or printers. Most likely your home devices support it, allowing them to be easily discovered by your computer or phone. UPnP is one of the zero-configuration networking protocols. This port is used by the SSDP and is used by the UPnP protocols. The attack was composed of UDP packets with source port 1900.
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It pretty much follows the world’s largest residential ISPs: $ cat ips-nf-asn.txt |uniq|cut -f 2|sort|uniq -c|sort -nr|headġ8809 3816 # CO Colombia Telecomunicacionesħ070 10796 # US Time Warner Cable Internet The reflector IP distribution across ASNs is typical. Here are the unique IPs per country: $ cat ips-nf-ct.txt|uniq|cut -f 2|sort|uniq -c|sort -nr|head The reflector servers are across the globe, with a large presence in Argentina, Russia and China. We estimate that the during 38 minutes of the attack each reflector sent 112k packets to Cloudflare. According to our sampled netflow data it utilized 930k reflector servers. The packets per second chart during the attack looked like this: It's worth deeper investigation since it crossed the symbolic threshold of 100 Gbps. This changed a couple of days ago when we noticed an unusually large SSDP amplification.
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Back then the average SSDP attack size was ~12 Gbps and largest SSDP reflection we recorded was: We’ll use the chrome-launcher library from npm to make this easy.Last month we shared statistics on some popular reflection attacks. The tips there apply to both Headless and GUI Chrome (with one quirk I’ll address in the next section).
#Packet sender chrome portable
We’ll use node but a lot of the content is portable to your language of choice provided you have the devtools hooks easily accessible.įirst off, if you’ve never explored scripting Chrome, Eric Bidelman wrote up an excellent Getting Started Guide for Headless Chrome.
#Packet sender chrome how to
In this post, I’ll go over how to intercept and modify JavaScript on the fly using Chrome’s devtools protocol. This is portable to any platform that has Chrome, bypasses a whole slew of issues, and integrates well with common JavaScript tooling. I’ve started to use Chrome and its devtools protocol in order to hook into requests and responses as they are happening and modify them on the fly. Proxies are extremely flexible, but are usually cumbersome and not very portable – everyone has their own custom setup for their environment and some people are more familiar with one proxy vs another.
#Packet sender chrome manual
Until recently, the easiest way to do this analysis was either with locally cached setups that enable manual editing or by using proxies to rewrite content on the fly. The local solution is the most convenient, but websites do not always translate perfectly to other environments and it often leads people down a rabbit hole of troubleshooting just to get productive. They are usually minified, often obfuscated, and always require multiple levels of modification before they are really ready for deep analysis. As part of our everyday routine, we dive into the scripts head first to understand what they’re doing and how they work. We find scripts that are maliciously injected into pages, they might be sent by a customer for advice, or our security teams might find a resource on the web that seems to specifically reference some aspects of our service. At Shape we come across many sketchy pieces of JavaScript.