Chapter 8 - Intrusion Detection

A(n) ________ event is an alert that is generated when the gossip traffic enables a platform to conclude that an attack is under way.

DDI

Activists are either individuals or members of an organized crime group with a goal of financial reward.

False

An inline sensor monitors a copy of network traffic; the actual traffic does not pass through the device.

False

Anomaly detection is effective against misfeasors.

False

Signature-based approaches attempt to define normal, or expected, behavior, whereas anomaly approaches attempt to define proper behavior.

False

Snort can perform intrusion prevention but not intrusion detection.

False

The IDS component responsible for collecting data is the user interface.

False

The _________ (RFC 4766) document defines requirements for the Intrusion Detection Message Exchange Format (IDMEF).

Intrusion Detection Message Exchange Requirements

The functional components of an _________ are: data source, sensor, analyzer, administration, manager, and operator.

IDS

The _________ module analyzes LAN traffic and reports the results to the central manager.

LAN monitor agent

_________ is a document that describes the application level protocol for exchanging data between intrusion detection entities.

RFC 4767

A common location for a NIDS sensor is just inside the external firewall.

True

An intruder can also be referred to as a hacker or cracker.

True

Intruders typically use steps from a common attack methodology.

True

Intrusion detection is based on the assumption that the behavior of the intruder differs from that of a legitimate user in ways that can be quantified.

True

Network-based intrusion detection makes use of signature detection and anomaly detection.

True

Running a packet sniffer on a workstation to capture usernames and passwords is an example of intrusion.

True

The primary purpose of an IDS is to detect intrusions, log suspicious events, and send alerts.

True

Those who hack into computers do so for the thrill of it or for status.

True

To be of practical use an IDS should detect a substantial percentage of intrusions while keeping the false alarm rate at an acceptable level.

True

A ________ monitors network traffic for particular network segments or devices and analyzes network, transport, and application protocols to identify suspicious activity.

network-based IDS

The rule _______ tells Snort what to do when it finds a packet that matches the rule criteria.

action

The broad classes of intruders are: cyber criminals, state-sponsored organizations, _________ , and others.

activists

_________ are either individuals or members of a larger group of outsider attacker who are motivated by social or political causes.

activists

The __________ is the human with overall responsibility for setting the security policy of the organization, and, thus, for decisions about deploying and configuring the IDS

administrator

The _______ is the ID component that analyzes the data collected by the sensor for signs of unauthorized or undesired activity or for events that might be of interest to the security administrator.

analyzer

The ________ is responsible for determining if an intrusion has occurred.

analyzer

_________ involves the collection of data relating to the behavior of legitimate users over a period of time.

anomaly detection

A (n) __________ is a hacker with minimal technical skill who primarily uses existing attack toolkits.

apprentice

_________ simulate human brain operation with neurons and synapse between them that classify observed data

neural networks

_________ anomaly detection focuses on characterizing the past behavior of individual users or related groups of users and then detecting significant deviations

profile-based

________ are decoy systems that are designed to lure a potential attacker away from critical systems.

honeypots

The purpose of the ________ module is to collect data on security related events on the host and transmit these to the central manager.

host agent

A _________ monitors the characteristics of a single host and the events occurring within that host for suspicious activity.

host-based IDS

A(n) ________ is inserted into a network segment so that the traffic that it is monitoring must pass through the sensor.

inline sensor

Copying a database containing credit card numbers, viewing sensitive data without authorization, and guessing and cracking passwords are examples of _________ .

intrusion

__________ is a security service that monitors and analyzes system events for the purpose of finding, and providing real-time warning of attempts to access system resources in an unauthorized manner.

intrusion detection

A ________ is a hacker with sufficient technical skills to modify and extend attack toolkits to use newly discovered vulnerabilities.

journeyman

A ________ IDS monitors traffic at selected points on a network or interconnected set of networks.

net-work based (NIDS)

A _________ is a security event that constitutes a security incident in which an intruder gains access to a system without having authorization to do so.

security intrusion

The _________ is the predefined formally documented statement that defines what activities are allowed to take place on an organization's network or on particular hosts to support the organization's requirements.

security policy

An IDS comprises three logical components: analyzers, user interface and _____.

sensors

________ detection techniques detect intrusion by observing events in the system and applying a set of rules that lead to a decision regarding whether a given pattern of activity is or is not suspicious.

signature

__________ involves an attempt to define a set of rules or attack patterns that can be used to decide if a given behavior is that of an intruder.

signature detection

The _________ to an IDS enables a user to view output from the system or control the behavior of the system.

user interface