How the Necro Trojan infected 11 million Android users - https://www.kaspersky.com/blog/necro-infects-android-users/52201/ 

Kryptina RaaS | From Unsellable Cast-Off to Enterprise Ransomware - https://www.sentinelone.com/labs/kryptina-raas-from-unsellable-cast-off-to-enterprise-ransomware/ 

Inside SnipBot: The Latest RomCom Malware Variant - https://unit42.paloaltonetworks.com/snipbot-romcom-malware-variant/