It is clear that Russia was hiring hackers to establish mobile communications in Ukraine
The Ukrainian National Security Agency has announced that it has arrested a hacker who has helped Russian troops establish a mobile network in Ukraine.
Ukraine Arrests'Hacker' It Says Was Routing Calls for Russian Troops
A phone relay capture may be the latest of Russia's communications woes in Ukraine --The Verge
https://www.theverge.com/2022/3/15/22979381/phone-relay-capture-russia-military-unencrypted-communications-ukraine
Ukraine has ordered domestic carriers to block Russian and Belarusian mobile numbers to counter the Russian invasion. As a result, it has been confirmed that Russian soldiers dispatched to the battlefield are collecting SIM cards by seizing mobile phones from Ukrainians and attacking mobile shops . In addition, Cathal McDaid, CTO of cyber security company Adaptive Mobile, said about the security measures taken by the Ukrainian side, 'It is difficult for the Russian army to communicate effectively in Ukraine.' ..
Meanwhile, the Security Service of Ukraine (SSU) has announced that it has detained a hacker who was providing technical assistance such as calling and sending messages to the invading Russian army. It is speculated that the hacker used the Ukrainian mobile network to support Russian military communications.
An announcement posted on SSU's official Facebook and Telegram states that 'SSU has detained hackers who provided mobile communications to occupiers in Ukraine.' According to the SSU, the Russian side can 'call by anonymous communication', 'send an SMS recommending surrender to Ukrainian security forces and civil servants', 'instruct Russian immigrant groups', etc. with the help of hackers. It is said that it has become possible to make thousands of calls a day.
The images published by SSU include a laptop-sized terminal (center of the image) called a SIM box used for voice communication and relaying text messages. Because the mobile phone numbers used in Russia do not work in Ukraine, hackers use terminals like SIM boxes to establish communication in Ukraine via multiple different SIM cards procured in other countries. am. 'By using a SIM box, you can receive calls via IP and send them over a mobile network to a Russian commander (perhaps you have a mobile phone with a SIM card in Ukraine or abroad). This will allow the Russian army to receive calls. '
McDaid points out the danger of the military using a SIM box, 'The fact that the Russian army is in a situation where it has to use something like a SIM box is a measure on the Ukrainian side. It shows that Russia is pushing Russia into an increasingly insecure system. ' Ukrainian intelligence said, 'Because of the insecure system, we were able to intercept calls made between Russian authorities.'
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