Logic bomb

Malicious code that triggers under specific conditions

A logic bomb is a piece of malware that is intentionally inserted into a software system to set off a malicious function when specified conditions are met. Unlike a computer virus, a logic bomb does not replicate itself but lies dormant until triggered by a specific event or condition.

Characteristics

Logic bombs are often embedded in legitimate software by a malicious insider, such as a disgruntled employee. They can be programmed to delete files, corrupt data, or otherwise disrupt the normal operation of a computer system. The triggering event can be a specific date and time, the deletion of a particular file, or the occurrence of a certain system event.

Examples

One of the most famous examples of a logic bomb is the Chernobyl virus, which was designed to activate on April 26, the anniversary of the Chernobyl disaster. Another example is the Sony BMG rootkit scandal, where a logic bomb was included in music CDs to prevent copying.

Prevention and Detection

Preventing logic bombs involves implementing strict access control measures and conducting regular code reviews. Intrusion detection systems (IDS) and antivirus software can also help in identifying and neutralizing logic bombs before they are triggered.

Related Concepts

• Trojan horse
• Time bomb
• Computer worm
• Ransomware
• Spyware

See Also

• Malware
• Cybersecurity
• Computer security
• Information security

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