Botnet

AAA

DEFINITION of 'Botnet'

An combination of "robot" and "network," botnet is a group of programs that work together by communicating over the Internet. The word has negative connotations: although botnets can be used perform innocuous tasks, they are often used to send spam email, steal money from bank accounts or perform denial-of-service attacks.

INVESTOPEDIA EXPLAINS 'Botnet'

Illegal botnets that do the most damage are made up of hundreds of thousands of computers whose legitimate users don't even realize that malware (malicious software) had been installed on their machines, turning them into "bots" that can be controlled by the botnet's operator. Botnets exploit weaknesses in browser security, but often, computer users inadvertently download malware themselves when they click on deceptive pop-ups while browsing. Malware can also arrive via a "Trojan horse," such as an email attachment. Users should always keep their browser security up to date, avoid clicking on suspicious links and pop-ups, and avoid opening attachments that they suspect may contain malware. Botnets are able to make it look as if the attachment came from one of the user's contacts. Check with the sender before opening an unexpected attachment. The sender is probably unaware that their computer has become recruited into a botnet and is sending spam. (For related reading, see: Does Your Portfolio Need A Does Of Cybersecurity?)

RELATED TERMS
  1. Disruptive Technology

    A technology that significantly alters the way that businesses ...
  2. HTTPS

    A secure form of Hypertext Transfer Protocol (HTTP) that is used ...
  3. FTP (File Transfer Protocol)

    A mechanism for the transfer of files between systems. File Transfer ...
  4. IP Address

    A unique identifier associated with a computer or network, and ...
  5. ISP (Internet Service Provider)

    A company that provides consumers, businesses, and other Internet ...
  6. Banker Trojan

    A malicious computer program designed to gain access to confidential ...
Related Articles
  1. What You Need To Know About Net Neutrality
    Stock Analysis

    What You Need To Know About Net Neutrality

  2. Why Cisco Systems Is Virtually Unavoidable
    Stock Analysis

    Why Cisco Systems Is Virtually Unavoidable

  3. This Company Is As Unavoidable As It ...
    Investing News

    This Company Is As Unavoidable As It ...

  4. Identity Theft Protection Services: ...
    Personal Finance

    Identity Theft Protection Services: ...

comments powered by Disqus
Hot Definitions
  1. Elasticity

    A measure of a variable's sensitivity to a change in another variable. In economics, elasticity refers the degree to which ...
  2. Tangible Common Equity - TCE

    A measure of a company's capital, which is used to evaluate a financial institution's ability to deal with potential losses. ...
  3. Yield To Maturity (YTM)

    The rate of return anticipated on a bond if held until the maturity date. YTM is considered a long-term bond yield expressed ...
  4. Net Present Value Of Growth Opportunities - NPVGO

    A calculation of the net present value of all future cash flows involved with an additional acquisition, or potential acquisition. ...
  5. Gresham's Law

    A monetary principle stating that "bad money drives out good." In currency valuation, Gresham's Law states that if a new ...
  6. Limit-On-Open Order - LOO

    A type of limit order to buy or sell shares at the market open if the market price meets the limit condition. This type of ...
Trading Center