Browse Definitions :
Definition

acoustical infection

Acoustic infection is a type of malware that uses a compromised computer’s sound card and speakers to send data using a covert ultrasonic acoustical mesh network.

Researchers at the Fraunhofer Institute for Communication, Information Processing and Ergonomics investigated the possibilities of malware performing data transfer across the sound devices in air gapped computers. Air gapping is a security measure that involves removing a computer or network from any external network physically and also ensuring there is no wireless connection.

In the proof of concept exploit, the researchers were able to hijack the target computer’s sound card and speakers to transmit data to a receiver. The researchers’ most successful trial used software intended for underwater communication. An infected air gapped computer sent out the ultrasonic signal, which was picked up by the attackers’ receiving microphone up 65 feet away and demodulated by the software on the attack computer. While, contrary to rumor, the proof of concept did not actually infect via sound waves, it is theoretically possible.

The proof of concept exploit used conventional means, such as external drives, to infect the target system. Despite acoustic infection’s low bandwidth (20bits/s), the fact that it uses sound beyond the range of human hearing means that malware can stealthily send data without an Internet connection. That capacity is enough to enable sending small phrases picked out for their relevance, making the strongest password easily accessible to the attacker.

To prevent data exfiltration in sound-gapped computers, the researchers recommend that the audio devices be removed. Nevertheless, it’s still possible that a compromised computer could be outfitted with supplemental audio devices that are very difficult to detect.

This was last updated in April 2014

Continue Reading About acoustical infection

SearchCompliance
  • pure risk

    Pure risk refers to risks that are beyond human control and result in a loss or no loss with no possibility of financial gain.

  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

  • risk avoidance

    Risk avoidance is the elimination of hazards, activities and exposures that can negatively affect an organization and its assets.

SearchSecurity
  • script kiddie

    Script kiddie is a derogative term that computer hackers coined to refer to immature, but often just as dangerous, exploiters of ...

  • cipher

    In cryptography, a cipher is an algorithm for encrypting and decrypting data.

  • What is risk analysis?

    Risk analysis is the process of identifying and analyzing potential issues that could negatively impact key business initiatives ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
  • gigabyte (GB)

    A gigabyte (GB) -- pronounced with two hard Gs -- is a unit of data storage capacity that is roughly equivalent to 1 billion ...

  • MRAM (magnetoresistive random access memory)

    MRAM (magnetoresistive random access memory) is a method of storing data bits using magnetic states instead of the electrical ...

  • storage volume

    A storage volume is an identifiable unit of data storage. It can be a removable hard disk, but it does not have to be a unit that...

Close