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In computing, a denial-of-service attack is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Denial of service is typically accomplished by flooding the targeted machine or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled.
An intrusion detection system is a device or software application that monitors a network or systems for malicious activity or policy violations. Any intrusion activity or violation is typically reported either to an administrator or collected centrally using a security information and event management (SIEM) system. A SIEM system combines outputs from multiple sources and uses alarm filtering techniques to distinguish malicious activity from false alarms.
mydoom also known as, my.doom, W32.MyDoom@mm, Novarg, Mimail.R, Shimgapi, W32/Mydoom@MM, WORM_MYDOOM, Win32.Mydoom is a computer worm affecting Microsoft Windows. It was first sighted on January 26, 2004. It became the fastest-spreading e-mail worm ever, exceeding previous records set by the Sobig worm and ILOVEYOU, a record which as of 2023 has yet to be surpassed.
In computing, a zombie is a computer connected to the Internet that has been compromised by a hacker via a computer virus, computer worm, or trojan horse program and can be used to perform malicious tasks under the remote direction of the hacker. Zombie computers often coordinate together in a botnet controlled by the hacker, and are used for activities such as spreading e-mail spam and launching distributed denial-of-service attacks against web servers. Most victims are unaware that their computers have become zombies. The concept is similar to the zombie of Haitian Voodoo folklore, which refers to a corpse resurrected by a sorcerer via magic and enslaved to the sorcerer's commands, having no free will of its own. A coordinated DDoS attack by multiple botnet machines also resembles a "zombie horde attack", as depicted in fictional zombie films.
Network security consists of the policies, processes and practices adopted to prevent, detect and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, which is controlled by the network administrator. Users choose or are assigned an ID and password or other authenticating information that allows them access to information and programs within their authority. Network security covers a variety of computer networks, both public and private, that are used in everyday jobs: conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access. Network security is involved in organizations, enterprises, and other types of institutions. It does as its title explains: it secures the network, as well as protecting and overseeing operations being done. The most common and simple way of protecting a network resource is by assigning it a unique name and a corresponding password.
Vern Edward Paxson is a Professor of Computer Science at the University of California, Berkeley. He also leads the Networking and Security Group at the International Computer Science Institute in Berkeley, California. His interests range from transport protocols to intrusion detection and worms. He is an active member of the Internet Engineering Task Force (IETF) community and served as the chair of the IRTF from 2001 until 2005. From 1998 to 1999 he served on the IESG as Transport Area Director for the IETF.
Stacheldraht is malware which performs a distributed denial-of-service (DDoS) attack. It was written by "Thomas Stacheldraht", a member of the Austrian hacker group TESO. It was first released in 1999.
The trinoo or trin00 is a set of computer programs to conduct a DDoS attack. It is believed that trinoo networks have been set up on thousands of systems on the Internet that have been compromised by remote buffer overrun exploits.
In computer security, a billion laughs attack is a type of denial-of-service (DoS) attack which is aimed at parsers of XML documents.
Security information and event management (SIEM) is a field within the field of computer security, where software products and services combine security information management (SIM) and security event management (SEM). They provide real-time analysis of security alerts generated by applications and network hardware. Vendors sell SIEM as software, as appliances, or as managed services; these products are also used to log security data and generate reports for compliance purposes. The term and the initialism SIEM was coined by Mark Nicolett and Amrit Williams of Gartner in 2005.
An algorithmic complexity attack (ACA) is a form of attack in which the system is attacked by an exhaustion resource to take advantage of worst-case performance. Worst-case performance through a back-end algorithm results in the exhaustion of the server, this creates algorithmic complexity vulnerabilities. According to Adam Jacobson and Dr. David Renardy, research scientists from Two Six Labs, "An AC Time vulnerability causes denial of service by exhausting CPU while AC Space vulnerabilities exhaust RAM or disk space." Examples of ACA attacks are zip-bombs, billion laughs, and ReDoS which are Malicious files aimed to render a program useless. Additionally, as stated by the Cybersecurity and Infrastructure Security Agency, a department within the Department of Homeland Security, “A denial-of-service (DoS) attack occurs when legitimate users are unable to access information systems, devices, or other network resources due to the actions of a malicious cyber threat actor. Services affected may include email, websites, online accounts, or other services that rely on the affected computer or network.” In other words, DoS attacks are a form of an attack in which a hacker can flood a server which outputs a denial-of-service error. ACA and DDoS attacks are forms of denial-of-service attacks in which the hacker can gain information through the Schemas files and its structure. In October 2022, Google released that they experienced the largest DDoS attack to date that took place in September 2017. Algorithmic complexity and its vulnerabilities are the main components that have given hackers ways to attack algorithms and its servers.
Low Orbit Ion Cannon (LOIC) is an open-source network stress testing and denial-of-service attack application written in C#. LOIC was initially developed by Praetox Technologies, however it was later released into the public domain and is currently available on several open-source platforms.
Used as part of computer security, IDMEF is a data format used to exchange information between software enabling intrusion detection, intrusion prevention, security information collection and management systems that may need to interact with them. IDMEF messages are designed to be processed automatically. The details of the format are described in the RFC 4765. This RFC presents an implementation of the XML data model and the associated DTD. The requirements for this format are described in RFC 4766, and the recommended transport protocol (IDXP) is documented in RFC 4767
SlowDroid is the first denial of service attack which allows a single mobile device to take down a network server requiring minimal bandwidth. The attack has been created for research purposes by Enrico Cambiaso and Maurizio Aiello for the IEIIT Institute of the National Research Council of Italy and released as an Android application.
High Orbit Ion Cannon (HOIC) is an open-source network stress testing and denial-of-service attack application designed to attack as many as 256 URLs at the same time. It was designed to replace the Low Orbit Ion Cannon which was developed by Praetox Technologies and later released into the public domain. The security advisory for HOIC was released by Prolexic Technologies in February 2012.
Zemra is a DDoS Bot which was first discovered in underground forums in May 2012.
BASHLITE is malware which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps.
On 3 September 2020, at 2:53 am EDT, a 16-year-old male from South Miami, Florida was arrested in connection with distributed denial-of-service (DDoS) attacks on the Miami-Dade County Public Schools's computer network, the fourth largest in the US, causing the system to crash during the first three days of the school year. It occurred as the school system was attempting to conduct internet-based instruction during the COVID-19 pandemic of 2020. After monitoring the IP addresses using the network, investigators concluded the teenager and several foreign actors had hacked the system. At the time, the school district had contracted Stride, Inc. to provide the software necessary for the internet-based instruction. Despite its price tag of $15.3 million, Stride was surprisingly susceptible to the attacks. Consequently, the school district sought the help of the FBI and U.S. Secret Service to investigate.
The term Slow DoS Attack was introduced in 2013, to clearly define a specific category of denial of service attacks which make use of low-bandwidth rate to accomplish their purpose. Similar terms can be found in literature, such as:
References
- ↑ kexugit. "XML Denial of Service Attacks and Defenses". learn.microsoft.com. Retrieved 2023-05-06.
- ↑ BetaFred. "Microsoft Security Bulletin MS13-095 - Important". learn.microsoft.com. Retrieved 2023-05-06.
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