US DHS Report on Lapsus$ Abuse of Telecom Services
https://www.cisa.gov/sites/default/files/2023-08/CSRB_Lapsus%24_508c.pdf
Statistics About Internet Threats to SOHO Routers
https://www.sans.edu/cyber-research/really-how-bad-do-routers-have-it/
Cisco Talos Report on Malware Aimed at Telcos
https://blog.talosintelligence.com/introducing-shrouded-snooper/