FedEx is the only major US company to have openly acknowledged the attacks on its systems until now REUTERS

The massive WannaCry ransomware attacks wreaked havoc across the globe over the weekend, with experts estimating that the ransomware hit between 100,000 to 200,000 computers across nearly 150 countries.

Although the attacks were stopped by a 22-year old British security researcher, who prefers being referred to as MalwareTech, the fix is temporary and only applies to the original ransomware strain. Security researchers have warned that the attackers will likely upgrade the malware to renew their global onslaught soon.

IBTimes UK brings you a list major government and private organisations affected by the global WannaCry ransomware attacks. These are just a handful of companies that have acknowledged or been reported about among the massive number of systems affected.

  • NHS: Hundreds of clinics and hospitals across UK suffered a massive outage in the wake of the attacks, with the administration being forced to delay or even cancel surgeries and X-rays of numerous patients.
  • Telefonica: The Spanish telephone giant said it was attacked, clarifying that "the infected equipment is under control and being reinstalled".
  • Renault: The French automobile giant was hit, forcing it to halt production at sites in France and its factory in Slovenia as part of measures to stop the spread of the virus
  • Deutsche Bahn: The German train operator was hit as travellers tweeted pictures of hijacked departure boards showing the ransom demand instead of train times. The company, however, insisted trains were running as normal

  • FedEx: The US package delivery group acknowledged it had been hit by malware and said it was "implementing remediation steps as quickly as possible"
  • Nissan: The firm's manufacturing plant in Sunderland, northeast England, was affected by the ransomware attack
  • Hitachi: The Japanese firm said that its email service was hit, and that some of its staff were unable to access attachments or send and receive messages.
    Infection map
    The map shows the affected countries MalwareTech
  • Russia Central Bank: The bank said they detected the ransomware but had successfully thwarted the attack
  • Russian Railways: The ransomware infected the Russian railways' IT systems. The organisation said that they were working to eliminate the threat and upgrade their anti-virus protections
  • Russian Interior Ministry: The ransomware also affected the government organisation, though the scope of the infection remains unknown
  • Iberdrola: The Spanish electric utility firm was also affected and disconnected its systems from the internet as a precautionary measure
  • Indian police in the state of Andhra Pradesh: The state police said they were locked out of their systems according to the Indian daily Economic Times
  • Electricity boards in India: A handful of electricity boards in the country have said their systems have been affected. One of them is the West Bengal State Electricity Distribution Company Ltd (WBSEDCL), whose 4 office caters to around 8,00,000 households
  • MegaFon: The biggest Russian telecom firm also confirmed having been affected by the attack
  • Sberbank: Russia's largest bank said they detected the ransomware but defended against the attack

  • Bank Of China: Many ATMs went dark and non functional in the wake of the attacks
  • China gas stations: Payment systems of gas stations in parts of China were shut down by the attacks
  • Chinese traffic police, immigration and public security bureaus: The agencies suspended many of its operations until the issues related to its systems were resolved, according to South China Morning Post
  • Singapore malls: Display boards of Tiong Bahru Plaza and White Sands showed the ransomware message
  • Japan government offices : Several city offices including the City Council of Osaka were locked out of their systems post the attacks
  • Multiplex chain in South Korea: Major theatre chain CJ CGV said around 50 of its complexes are estimated to have been attacked by the malware
  • Sandvik: The Swedish IT firm's computers in both administration and production were hit
  • Petrobras: Brazil's state-owned oil company was also affected by the ransomware attack and turned off its computers as a precaution
  • Brazil's Foreign Ministry: The government organisation also fell victim to the attacks and switched off its computers
  • Brazil's social security system: The attacks affected Brazil's social security systems, forcing it to disconnect computers and cancel public access to the agency
  • Portugal Telecom: The firm acknowledged being hit by the attack but said it has managed to contain the ransomware from spreading according to Reuters.