Atlanta mayor Keisha Bottoms said on Thursday , March 22 , that hackers attacked Attack.Ransom the city ’ s network system and encrypted data . The details are somewhat slim for now , but hackers reportedly used the SamSam ransomware and demand Attack.Ransom around $ 51,000 in Bitcoin to unlock the city ’ s seized computers . Atlanta is currently working with the Department of Homeland Security , the FBI , Microsoft , and Cisco cybersecurity officials to determine the scope of the damage and regain control of the data held hostage . “ Our Atlanta Information Management team is working diligently with support from Microsoft to resolve the issue , ” the city ’ s official Twitter account states . “ We are confident that our team of technology professionals will be able to restore applications soon . Our city website , Atlantaga.gov , remains accessible and we will provide updates as we receive them. ” As of Thursday afternoon , the city said it faced outages on various “ internal and customer facing applications , ” such as means for accessing court-related information and paying bills . But the city itself isn ’ t exactly under siege : Airport , public safety , and water operations remain unaffected by the attack , and the city payroll wasn ’ t touched . The only bone Atlanta is throwing the public is that the attack affects “ various city systems. ” According to Atlanta ’ s newly appointed chief operating officer , Richard Cox , Atlanta Information Management officials were made aware of problems with internal and customer-facing applications at 5:40 a.m. Thursday . At the time , he acknowledged that the city fell prey to ransomware , but given the investigation is still ongoing , he couldn ’ t provide the extent of the damage . “ The ongoing investigation will determine whether personal information , financial , or employee data has been compromised Attack.Databreach , ” he said during a press briefing . “ As a precaution , we are asking that all employees take the appropriate measures to ensure their data is not compromised Attack.Databreach . The city advises employees to monitor and protect personal information and in the coming days we will offer employees additional resources if needed. ” What the city didn ’ t officially disclose was the ransomware note discovered in the investigation . A screenshot reveals the hackers ’ demands Attack.Ransom : 0.8 Bitcoins for each seized computer , or six bitcoins to unlock all computers held hostage , equaling to around $ 51,000 in real cash . Once Atlanta sends the Bitcoins to a digital wallet , the city is to leave a message containing the host name on a specific website . The hackers will then provide decryption software to release the computers from captivity . The SamSam malware doesn ’ t take the typical route of installing itself on computers when unsuspecting owners click a link within an email . Instead , hackers find Vulnerability-related.DiscoverVulnerability unpatched vulnerabilities in network servers and manually unleash SamSam to seize key data systems and cause maximum damage to the company ’ s infrastructure . SamSam is one of many in a family of ransomware targeting government and healthcare organizations . It was first observed in 2015 and encrypts various file types using the Advanced Encryption Standard ( aka Rijndael ) . It then encrypts that key with RSA 2048-bit encryption to make the files utterly unrecoverable . As of Friday morning , Atlanta ’ s main website and its affiliated portals remained unaffected by the ransomware attack Attack.Ransom .