"Clickbait emails, URL shortening services and phishing messages -- that's how a small and unheard of Delhi-based company named BellTroX allegedly ruled the 'hack-for-hire' world of 'cyber mercenaries', which targeted thousands of individuals and hundreds of professionals. The company, owned by its director Sumit Gupta, is officially an independent firm of "transcriptionists, designers, developers" but its secret hacking operations spanned across Europe and the US.
A report by Citizen Lab, an interdisciplinary laboratory based at the Munk School of Global Affairs at the University of Toronto, Canada, on Tuesday concluded that BellTroX is behind an organisation of hackers (named Dark Basin) that spied on over 10,000 email accounts for several years. Its victim included judges, politicians, journalists, gambling tycoons, environment groups, among others.
Though Sumit Gupta has denied any wrongdoing, his chequered past he was charged by US authorities in a hacking case in 2015 and the tracking of hacking operations by Dark Basin alleges he could be the mastermind behind several hacking cases."
Source: https://www.businesstoday.in/current/corporate/who-is-sumit-gupta-the-founder-of-belltrox/story/406526.html