Hackers are leveraging the popular Telegram messaging app by embedding its code inside a remote access trojan (RAT) dubbed ToxicEye. This malware can take over file systems, install ransomware and leak data from victim's computers

https://blog.checkpoint.com/2021/04/22/turning-telegram-toxic-new-toxiceye-rat-is-the-latest-to-use-telegram-for-command-control/