How is it possible to track a transaction which it does not exist on blockchain and only disclose to the parties involved?
I have no idea how they are going to trace those coins, but may be they need more money to fully explain that. As far as I know, they are asking for 10 millions $, which is a big amount of money.
You're right they did mention ETH,Monero, and Dash since they are among the top crypto used in crypto realms along with BTC.
The article explained how they are planning to trace coins which i believe they wont be able to trace privacy coin (Grin/Monero) and mixing company users if they avoid human errors.
How artificial intelligence can help keep track of the cryptosphere
Rosfinmonitoring plans to create an AI that will monitor the entire Internet in search of illegal actions with cryptoassets, explains Nikita Kulikov, member of the State Duma expert council, founder of PravoRobotov ANO. Cryptocurrency transactions are carried out on blockchain systems. The main property of the blockchain is the immutability of information about transactions, each stage of which is linked into a chain, and therefore it cannot be changed. This data is available to all participants in the blockchain, but it will be possible to identify the participants in transactions only if at least some initial information is known, the expert explains.
For example, if there is information that an account has been created on a site on the darknet, you can trace the accounts that sent funds to its crypto wallet, adds Dmitry Goroshevsky, CTO of TON Labs: “Next, if you want to open an account on some legitimate crypto exchange , and then withdraw funds to an account associated with transactions with an account from the darknet, then this is a reason for the exchange security officer to pay attention to your account. "