Security researchers noticed that some cybercriminals are using Telegram channels to steal credit card information from customers making a purchase on victim sites. The method was discovered by Affable Kraut using data from Sansec, a company specialized in fighting digital skimming. Kraut explains how the script works, noting that it collects data from any type of input field and sends it to a Telegram channel. Payment details will then be sent to both the legitimate payment processor and the cybercrooks. This method eliminates the need for data exfiltration infrastructure, which could be blocked by security solutions.
Source: https://www.bleepingcomputer.com/news/security/credit-card-data-smuggled-via-private-telegram-channel/