Sunday, May 19, 2024

Hackers Steal Data From Air-gapped Computers by Turning Power Supply to Speakers

Researchers proposed a new method that enables attackers to steal data acoustically from air-gapped and audio-gapped systems.

Air-gapped computers are the computers isolated from the Internet and other local networks, the audio-less systems are considered to be audio-gapped.

Malware Manipulates Power Supply

Security researcher Mordechai Guri from the Ben-Gurion University of the Negev, Israel demonstrated the attack with a malware that exploits computer power supply unit (PSU) to play sounds and use them as a secondary speaker.

“The malicious code manipulates the internal switching frequency of the power supply and hence controls the sound waveforms generated from its capacitors and transformers.”

By using the attack method attackers can play audio streams from a computer even when audio hardware is disabled and speakers are not present.

“Our technique enables producing audio tones in a frequency band of 0-24khz and playing audio streams (e.g., WAV) from a computer power supply without the need for audio hardware or speakers. Binary data (files, keylogging, encryption keys, etc.) can be modulated over the acoustic signals and sent to a nearby receiver (e.g., smartphone).”

To launch the attacker, there is no additional hardware required or special privileges required, an attacker should first compromise the transmitter and receiver.

Then the malware in the infected computer gathers sensitive data such as files, keystroke logging, credentials, encryption keys and transfer them using the acoustic sound waves emitted by the computer’s power supply.

By using a nearby compromised device such as mobile phones attackers can decode the data and transfer to the server controlled by them.

Researchers told that this technique works with various types of systems: PC workstations and servers, as well as embedded systems and IoT devices that have no audio hardware at all.

“By using POWER-SUPPLaY attack, we could acoustically exfiltrate data from audio-less systems to a nearby mobile phone at a distance of 2.5 meters with a maximal bit rate of 50 bit/sec.”

Recently another paper published shows that attackers can exfiltrate sensitive information from the air-gapped computers by manipulating the brightness of the screen.

Other Air-Gapped Computers Attack

Hackers can use Power Lines to Steal Data from Air-Gapped Computer

CIA Hacking Tool “Brutal Kangaroo” Revealed to Hack Air-Gapped Networks by using USB Thumb Drives -WikiLeaks

Hackers can use Surveillance Cameras and Infrared Light to Transfer Signals to Malware


Latest articles

Norway Recommends Replacing SSLVPN/WebVPN to Stop Cyber Attacks

A very important message from the Norwegian National Cyber Security Centre (NCSC) says that...

New Linux Backdoor Attacking Linux Users Via Installation Packages

Linux is widely used in numerous servers, cloud infrastructure, and Internet of Things devices,...

ViperSoftX Malware Uses Deep Learning Model To Execute Commands

ViperSoftX malware, known for stealing cryptocurrency information, now leverages Tesseract, an open-source OCR engine,...

Santander Data Breach: Hackers Accessed Company Database

Santander has confirmed that there was a major data breach that affected its workers...

U.S. Govt Announces Rewards up to $5 Million for North Korean IT Workers

The U.S. government has offered a prize of up to $5 million for information...

Russian APT Hackers Attacking Critical Infrastructure

Russia leverages a mix of state-backed Advanced Persistent Threat (APT) groups and financially motivated...

Millions Of IoT Devices Vulnerable To Attacks Leads To Full Takeover

Researchers discovered four significant vulnerabilities in the ThroughTek Kalay Platform, which powers 100 million...
Guru baran
Guru baran
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

Live API Attack Simulation

94% of organizations experience security problems in production APIs, and one in five suffers a data breach. As a result, cyber-attacks on APIs increased from 35% in 2022 to 46% in 2023, and this trend continues to rise.
Key takeaways include:

  • An exploit of OWASP API Top 10 vulnerability
  • A brute force ATO (Account Takeover) attack on API
  • A DDoS attack on an API
  • Positive security model automation to prevent API attacks

Related Articles