Tyler Technologies, Inc. is the largest provider of software to the United States public sector. At the end of September, the company disclosed a ransomware attack and its customers reported finding suspicious logins and previously unseen remote access tools on their networks.
The ransomware attack took place on September 23, the threat actors breached the network of the company and deployed the malware.
Tyler notified law enforcement and hired a forensics firm to investigate the incident and determine the extent of the incident.
Immediately after the attack company representatives declared that the incident only impacted the internal network and phone systems.
Some reports circulating online speculate the company was infected with the RansomExx ransomware.
The RansomEXX is human-operated ransomware, this means that attackers manually infected the systems after gained access to the target network.
According to BleepingComputer, which cited a source informed on the event, Tyler Technologies paid a ransom of an unspecified amount to receive the decryption key and recover encrypted files.
“When the ransomware encrypted Tyler Technologies’ files, they appended an extension similar to ‘.tylertech911-f1e1a2ac.'” reported BleepingComputer.
When decrypted, the Arin.txt file contained a list of IP ranges used by the company.
Experts pointed out that many school districts, court systems, and local and statement governments in the United States uses Tyler Technologies software, this means that the disclosure of data stolen during the ransomware attack could have serious consequences.
For this reason, the company decided to pay the ransom.
(SecurityAffairs – hacking, Tyler)
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