Denial Of services

Ahmad Muammar W. K.http://google.com/search?q=y3dips

http://google.com/search?q=y3dips

DOSTypesSimulationInternet WormDDOSDiscussion

Details


A denial-of-service attack is an attack on a computer system or network that causes a loss of service to users

DOS


MotivesMoneyRevengePrestigeGaining AccessPolitic


DOS HistoryClassical DOS Internet WormsDdos



Classical DOSApplication BugConsumption of computational resourcesDisabling web trafficMail bombing



TCP syn floodICMP/UDP/ECHO (ping) to broadcast addresses ( SMURF)Out of Band (oob) Attack (winnuke:139) ARP poisoningPing of Death (win95)Port flooding Mail bombing

Some Examples/Types



Mass Spamming?A Real Life ExampleUsing SMTPEasy Proof Of concept

Reply to : [email protected]

Sender : [email protected]

To : xxx@multiple server

Received : [email protected]

Mail Server A

Mail Server B

Mail Server C


<?

$recipient = “xxx@multiple mailserver";

$subject = “fake";

$mailheaders = "From: [email protected] \n";

$mailheaders .= "Reply-To: [email protected]\n";

$msg= "\nIts a spam\n";

mail($recipient, $subject, $msg, $mailheaders) or die (“tidak terkirim!");

?>



ApplicationServicesSystem

CPUMemoryRamNetworking

DDOS against


DDos Against IEInternet Explorer is Microsoft Windows Web browserSome Version has hole in XML scriptError in Application

<table>

<tr><td><IMG align=left>X X X<?xml:namespace prefix=v>

<v:X style="HEIGHT:1"></td></tr>

</table>


Apache is a free web server Some Version vulnerable to this kind of DosServer temporary down

DDos Against Apache


Limited ResourcesMultiple ProcessSome Infinite loop wouls suck more resources

DDos Against cpu, memory, ram


Flooding the networkCut all trafficFill the bandwidth

DDos Against Network



WormA computer program which replicates itself and is self-propagating. Worms, as opposed to viruses, are meant to spawn in network environments.


WormActive propagated itself Combine With sytem/application hole Ddos Agent/zombie

web traffic flooding

Mass war machine

Resources Take Over



Distributed AttackMultiple ImpactZombie/Agent

D dos


Any types of Dos ttack

Single user Target

Attacker

zombie

zombie

zombie

zombiezombie

zombie

Target



Survive (mitigate Ddos)Network ConfigurationChange IP AddressStrong peripheral

Filtering Technique (signatures of the traffic)Some Mirror/Backup

Date post:	18-May-2015
Category:	Economy & Finance
Upload:	ammar-wk
View:	1,095 times
Download:	3 times

Denial Of services

Economy & Finance