A Bristol Airport ransomware attack has resulted in its customer display screens being taken offline for two days. Staff at the airport have had to resort to using dry markers and whiteboards to display flight arrival and departure information while the malicious software was removed and files were decrypted.
Ransomware was installed on its administrative computer system in the early hours on Friday, 14 September. As a result of the attack, several applications had to be taken offline as part of the airport’s efforts to contain the attack and prevent critical airport systems from being affected. The application used to display arrival and departure information throughout the airport was one of the casualties.
A statement was provided to the media confirming that a ransom demand had been received but the decision was taken not to give in to the attacker’s demand. Instead, IT staff at the airport chose to restore affected systems from backups. That process continued throughout the weekend. Screens in key locations throughout the airport were slowly brought back online on Sunday and efforts are continuing to restore files on all other affected computers at the airport.
Bristol Airport spokesman, James Gore, said initial investigations suggest this was a speculative rather than a targeted attack on the airport and that it was an online attack on its administrative systems. The exact nature of the Bristol Airport ransomware attack has not yet been disclosed and it is not known what variant of ransomware was used.
The recovery process has taken longer than was expected as the airport has adopted a particularly cautious approach due to the number of critical and security systems at the airport which could potentially have been affected. As it was, customer and airport safety were not affected by the ransomware attack and flights were not delayed.
Ransomware Still Poses a Major Threat to Businesses
Ransomware attacks have declined in recent months as many cybercriminals have turned to cryptocurrency mining as an easier way of generating an income, but the Bristol Airport ransomware attack shows that the threat of ransomware attacks is ever present. Cybercriminals have certainly not totally abandoned ransomware and it remains a serious threat.
Online attacks are also common. Ransomware is still widely distributed via exploit kits – Software loaded onto compromised websites that probes for vulnerabilities in browsers and plugins. When vulnerabilities are identified, they are exploited and ransomware is silently downloaded.
How to Prevent Ransomware Attacks
Protecting against ransomware attacks requires layered security solutions to block the key attack vectors. Spam filtering software will block the majority of malicious emails and prevent them from being delivered to end users’ inboxes. Security awareness training will help to ensure that employees can identify any malicious emails than make it past perimeter email security controls.
One of the most effective solutions for blocking web-based attacks is a web filter. Web filters can be configured to prevent end users from visiting malicious websites and will block drive-by downloads of malware. Naturally, all software, including browsers and browser plugins, should be kept up to date and fully patched to prevent vulnerabilities from being exploited. Anti-virus software on all servers and end points is also a must.
As was the case with the Bristol airport ransomware attack, files could be recovered from backups without the need to pay the ransom demand. To ensure file recovery is possible, regular backups must be made.
A good backup practice will see at least three backup copies created, on at least two separate media, with one copy stored securely offsite on a device that is not connected to a network or the Internet.
For more information on anti-ransomware solutions for businesses, speak to TitanHQ today. TitanHQ offers award-winning spam filtering and web filtering technology that blocks malware and ransomware attacks and other email and web-based threats.