8 Best DDoS Attack Tools

A distributed denial-of-service (DDoS) attack is an evil attempt to disrupt a targeted service or network’s regular traffic by overwhelming the target or the infrastructure with a flood of online traffic. DDoS attacks achieve effectiveness by utilizing multiple compromised computer systems as sources of attack traffic. Exploited machines include computers and other networked resources such as IoT devices. A DDoS attack is like a traffic jam blocking up a highway, preventing regular traffic from arriving at its desired destination.

How does a DDoS attack work?

A DDoS attack requires an attacker to control a network of online machines to carry out an attack: computers and other appliances are infected with malware, turning each one into a bot. The attacker has remote control over the group of bots, which are called botnets.

Once a botnet is established, the attacker can direct the machines by sending updated instructions to each bot via remote control. When the botnet targets the IP address, each bot responds by sending requests to the target, which results in a denial-of-service to regular traffic. Because each bot is a legal Internet device, separating the attack traffic from regular traffic can be difficult.

Types of DDoS Attacks

DDoS offer a less complicated attack mode as compared to other forms of cyberattacks; they are growing more robust and more sophisticated. 

There are three basic categories of attack:

  • Volume-based attacks– It uses high traffic to inundate the network bandwidth
  • Protocol attacks– It focuses on exploiting server resources
  • Application attack– It focuses on web applications and are considered the most sophisticated and severe type of attacks

Different types of attacks fall into categories based on the traffic quantity and the vulnerabilities being targeted.

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Some common DDoS attacks are:

  • SYN Flood
  • UDP Flood
  • HTTP Flood
  • Ping of Death
  • Smurf Attack
  • Fraggle Attack
  • Slowloris
  • Application-level attacks

So now the question is how can you protect your system from such attacks. In this article, we will provide you with the best possible DDoS attack tools.

Best DDoS Attack Tools

  1. Hulk
  2. SolarWinds Security Event Manager 
  3. Slowloris
  4. Tors Hammer
  6. RUDY
  7. LOIC
  8. Pyloris


HULK is a Denial of Service tool used to attack web servers by generating unique and obfuscated traffic volumes. HULK’s generated traffic also bypasses caching engines and hits the server’s direct resource pool.

DDoS Tool


  • It generates a great volume of traffic at the server.
  • It can bypass the cache engine.

SolarWinds Security Event Manager 

SolarWinds is a Security Event Manager that is effective mitigation and prevention software to stop DDoS Attacks. Solarwinds is designed to process and receive tens of thousands of event log messages generated by servers and network devices.

It uses a compact matching engine to instantly correlate events, identifying potential security threats or other issues.

The response is incredibly fast, though higher log volumes could lead to slower processing depending on how powerful your server is.

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  • SEM consists of features such as sending alerts, shutting down an account, or blocking an IP
  • The tool allows you to configure the options by using the checkboxes.
  • It keeps the events and logs in an encrypted format and records them in a read-only form.
  • The methods of maintaining catalogs and events will make SEM one of the best tools
  • SEM allows you to customize filters according to specific timeframes, accounts/IPs, or combinations of parameters.
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Slowloris is a DDoS attack software that enables a single computer to take down a web server. Due to this attack’s elegant yet straightforward nature, it requires less bandwidth to implement and affects the target web server only, with almost no side effects on other ports.

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Slowloris is highly-effective against many types of web server software, which includes Apache 1.x and 2.x.

Slowloris has been credited with several high-profile server takedowns. It was used by Iranian ‘hacktivists’ following the 2009 Iranian presidential election to attack Iranian government websites.


  • It sends HTTP traffic to the server.
  • It doesn’t affect other ports on the target network.
  • This attack tries to keep the most of the connections that are engaged with those that are open.
  • It holds the links as long as possible.
  • As the server supports the false connection available, this will overflow the connection pool and deny the right connections.

Tors Hammer

Tor’s Hammer is a slow post-DDoS testing tool written in Python. You can also run it through the Tor network. The idea behind the Tor’s Hammer attack is to saturate the entire TCP stack for the HTTP/S daemon;It is done by slowly opening up connections and then sending an incomplete request to keep the link alive as long as possible. The tool does this slowly, and it is possible that a single attacking machine can take down a web server.


  • You will remain unidentified if you run it through Tor network. 
  • Use in order to run it through Tor.
  • The attack can be made on IIS servers and Apache with this tool.


DDOSIM is a tool used in a laboratory environment to simulate a distributed denial-of-service attack against a server. The test shows the capacity of the server to handle application-specific DDOS attacks. It is written in C++ and runs on Linux.

It simulates several zombie hosts that create full TCP connections to the target server. After completing the link, DDOSIM starts the conversation with the listening application.

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  • It attacks the server by reproducing zombie hosts.
  • The hosts create a TCP connection with the server.
  • It can do HTTP DDoS attacks using certain requests.


R.U.D.Y. is a DDoS attack tool that aims to keep a web server together by submitting form data at a slow pace. A R.U.D.Y. exploit is categorized as a low-and-slow attack since it focuses on creating a few drawn-out requests rather than overwhelming a server with a high volume of quick submissions. A successful R.U.D.Y. attack will result in the victim’s origin server becoming unavailable to legitimate traffic.

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The R.U.D.Y. software includes a user-friendly point-and-click interface, so all an attacker needs to point the tool at a vulnerable target. Any web service that accepts form input is susceptible to a R.U.D.Y. attack since the device works by sniffing out form fields and exploiting the form submission process.

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  • It has an interactive console menu.
  • You can select the forms from URL for POST-DDoS attack.
  • It identifies the fields for data submission.


LOIC (Low Orbit Ion Cannon) is an open-source application developed by Praetox Technologies that is used for distributed denial of service (DDoS) attacks.

DDoS perpetrators use LOIC to flood  systems with junk UDP, TCP and GET requests. Although a single LOIC user is unable to generate enough requests to impact a target significantly.

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  • It is relatively easy to use.
  • It sends UDP, HTTP requests to the server.
  • It can make the attack based on the URL or IP address of the server.
  • It will NOT HIDE your IP address. 


Pyloris is a slow HTTP DoS tool that enables the attacker to craft its HTTP request headers. These include the packet header, cookies, packet size, timeout, and CRLF option.

Pyloris objective is to keep TCP connections open for as long as possible between the attacker and the victim’s servers. This results in exhausting the server’s connection table resources. Once the server’s connection table is finished, it will not be able to handle new connections from legitimate users, resulting in a denial-of-service.

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  • It has an easy-to-use GUI.
  • The attack can be made on HTTP, FTP, SMTP, IMAP, and Telnet.
  • It directly makes a service attack.

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