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Colorado restored its state web portal home page and is working with state and federal partners to investigate the incident. Other sources have named pro-Russian hackers, Killnet, as the perpetrators.

hacker uses keyboard
Colorado’s state web portal home page,, returned online yesterday evening after being downed in an Oct. 5 cyber attack, the state announced.

That home page was the only one of the state’s offering affected by the cyber incident, according to the press release. sites are managed in collaboration by the state Governor’s Office of Information Technology, State Emergency Operations Center and Statewide Internet Portal Authority and a vendor. These parties were able to restore access to the impacted home page at 6 p.m. MDT on Oct. 6.

Those four partners are continuing to monitor other state websites and systems.

Colorado stated that it also is working with state and federal partners on investigating the incident, and that it could not disclose additional details “due to the sensitivity and nature of the cyber event.”

While Colorado has not named the perpetrators, CNN reported yesterday that pro-Russian hacking group Killnet claimed credit for downing as well as websites in Kentucky and Mississippi. Killnet is known for website defacements and distributed denial-of-service (DDoS) attacks. Both Kentucky and Mississippi restored access to their sites later on Oct. 5.