Tyler Technologies Says Clients Reported Suspicious Logins After Hack

The company, which had said Wednesday that the hack appeared confined to its internal network, on Saturday urged clients to reset passwords that Tyler staff would use to access customer versions of its software.

Tyler provides a wide range of software to local governments, including programs to dispatch police in emergencies and to display local information, including election results. Those programs do not tabulate the votes themselves.

Tyler said it is cooperating with the FBI, which has declined to comment. It declined to say which customers had detected improper logins or when those suspected intrusions occurred.

A great number of criminals use ransomware to encrypt a target’s files and demand payment, and many city departments have been forced to pay thousands or even millions of dollars in the past few years.