In addition to accessing random pages and stealing login credentials, the hackers were able to steal private pictures of individuals and spread these photos on the internet. By targeting the individual's profile page and stealing this information, the hackers took advantage of the fact that profile pages did not require a phone number to be linked to the page.
After the hack, the attackers turned Odnoklassniki into a place where users could register anonymously and share their personal information. As of June 10, 2019, there are more than 40,000 user accounts registered, not including phones. Unlike normal accounts, guests were able to easily register. Among them were users that saw their personal data for 10 years, including the names and birthdays of their friends, and a user that had a presence in over 8,000 friends of the user. One of the users shared an article with the same title as his friends, and the hacker was able to access the article using this method, including people without previous knowledge of his page.
For example, a hacker could take advantage of a table that included users' profile pictures. User accounts that were linked to their profile pictures were also exposed. Due to the leak, users that did not change their passwords were subject to a hacker's account.
The hacker used the information they obtained to create, share, and write stories online with false information about an arrested politician, a former minister, and a Ukrainian Navy captain. In addition, they wrote news about the lives of random people and others who had died in real life. These stories were published without the owners' consent or knowledge. The incident was a security vulnerability in Odnoklassniki's contribution management system. The company reported the incident to the Main Investigative Directorate of the National Police of Ukraine, to the General Prosecutor's Office, and to the working group of the Cabinet of Ministers on the Cyber Security of Ukraine. Police investigations found that the hacker used the hacked data to create profile pictures and photo albums.