Senin, 04 Juli 2011

DoS Web Server (Pyloris DoS)

A denial-of-service attack (DoS attack) or distributed denial-of-service attack (DDoS attack) is an attempt to make a computer resource unavailable to its intended users. Although the means to carry out, motives for, and targets of a DoS attack may vary, it generally consists of the concerted efforts of a person or people to prevent an Internet site or service from functioning efficiently or at all, temporarily or indefinitely. Perpetrators of DoS attacks typically target sites or services hosted on high-profile web servers such as banks, credit card payment gateways, and even root nameservers. The term is generally used with regards to computer networks, but is not limited to this field, for example, it is also used in reference to CPU resource management.

One common method of attack involves saturating the target (victim) machine with external communications requests, such that it cannot respond to legitimate traffic, or responds so slowly as to be rendered effectively unavailable. In general terms, DoS attacks are implemented by either forcing the targeted computer(s) to reset, or consuming its resources so that it can no longer provide its intended service or obstructing the communication media between the intended users and the victim so that they can no longer communicate adequately.

DoS attack methode, like : ICMP flood, Teardrop Attacks, Peer-to-peer attacks, Permanent denial-of-service attacks, Application level floods, Nuke, Distributed attack, Reflected attack, Degradation-of-service attacks, Unintentional denial of service, Denial-of-Service Level II, Blind denial of service.

Download interface CLI
Code:
# wget http://xhabie-crew.110mb.com/app/ddos/pyloris-3.0.tar.gz
Download Interface GUI
Code:
# wget http://xhabie-crew.110mb.com/app/ddos/pyloris-3.0.zip
How to base use :

Untuk menjalankan tools tools tersebut cukup mengeksekusi file pyloris-3.0.py dan jangan lupa untuk men-chmod file sebelum di eksekusi

Code:
# chmod +x pyloris-3.0.py
Code:
# python pyloris-3.0.py victim.com
Code:
# python pyloris-3.0.py -a 500 victim.com
Ini tampilan dari GUI Pyloris DoS
Click this bar to view the original image of 800x391px.


[quote]
-a, --attacklimit
The --attacklimit flag restricts the number of total connections (current + completed) during a single session. Set this to zero to specify no limit.

-c, --connectionlimit
Adjusting the --connectionlimit flag can drastically change how well HTTPLoris performs. The --connectionlimit flag directly controls the number of concurrent connections held during the session. In a base Apache environment, when this number is above the MaxClients setting, the server is unresponsive.

-t, --threadlimit
This is the number of attacker threads run during the session.

-b, --connectionspeed
This is the connection speed for each individual connection in bytes/second. Comparing this with the lenght of the request, and you should have an accurate guess of how long each connection should linger.

-f, --finish
Specifying the --finish flag will cause HTTPLoris to finish and close connections upon the completion of the request. This will prompt servers to send full responses to the HTTP requests that are made.

-k --keepalive
Using the --keepalive flag will add the Connection: Keep-Alive header to the HTTP request. On vulnerable servers, this will increase the duration of connections considerably.

-p, --port
HTTPLoris will connect on port 80 by default. Specifying the --port flag will change this behavior.

-P, --page
By default, HTTPLoris will make HTTP requests for "/". Setting the --page flag will allow one to control the page that HTTPLoris requests.

-q, --quit
Terminate the connection without receiving reply from the server. This will reduce the effectivenes as connections will terminate as soon as the full request buffer has been sent.

-r, --requesttype
Setting the --requesttype flag will change the HTTP method used. Available options are GET, HEAD, POST, PUT, DELETE, OPTIONS, and TRACE. Certain proxies and load balancers will filter out certain types of requests, and hold them until the requests are complete. POST requests are commonly passed through due to their potential for large sizes, therefore this may cause different behavior.

-R, --referer
Adds a referring URL to the HTTP request.

-s, --Size
The --size flag allows one to increase the size of the request made. Increasing the size will in turn increase the duration of connections, leading to a longer sustained test. In situations where servers or firewalls are set to terminate unfinished connections, this can extend the length of the test drastically. This can also be used to test a web server's capability to handle multiple large requests and benchmark memory usage. The additional data is filled in the Cookie-Data field.

-u, --useragent
By default, HTTPLoris advertizes itself in the User-Agent header. The --useragent flag allows one to override this and masquerade as other web browsers. Useful because some sites will render different pages for different web browsers.

-z, --gzip
Specifying the --gzip flag will allow instruct PyLoris to send an "Accept-Encoding: gzip" header. When combined with the --quit and --finish flags, this can test for the CEV-2009-1891 DoS vulnerability (http://www.mail-archive.com/ dev@httpd.apache.orgThis e-mail address is being protected from spambots. You need JavaScript enabled to view it /msg44323.html). Also leads to larger CPU usage and smaller bandwidth usage.

-w, --timebetweenthreads
Setting the --timebetweenthreads flag will adjust the amount of time between threads spawning. Adjusting this in conjunction with the --threadlimit will change the CPU load on your local machine.

-W, --timebetweenconnections
Setting the --timebetweenconnections flag will adjust the amount of time between socket connections. This will directly affect how quickly the target's connection limit is reached.

Proxy Options
HTTPLoris is able to connect through SOCKS4, SOCKS5, and HTTP proxies. This allows HTTPLoris to run through SSH tunnels, as well as TOR. Utilizing TOR should essentially eliminate the mitigating effects of ipchains, mod_antiloris, and mod_noloris.

--socksversion
Setting the --socksversion flag tells HTTPLoris to connect through a SOCKS proxy. Allowed values are SOCKS4, SOCKS5, and HTTP.

--sockshost
Set the --sockshost flag to the address of the SOCKS proxy when --socksversion is set. If this is not set, HTTPLoris will default to 127.0.0.1.

--socksport
Set the --socksport flag to the port number of the SOCKS proxy when --socksversion is set.

--socksuser and --sockspass
Optionally, one may set a username and password for the SOCKS proxy using these two flags.

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