TellYouThePass ransomware was an old dormant ransomware supposed to be dead. But Log4j's Log4Shell vulnerability, resurrect it and it jumps into action once again. It targets mostly Chinese speaking population.

ALPHV BlackCat Ransomware or simply BlackCat Rasomware is an advance and a sophisticated piece of malware written in Rust programming language. It encrypts data of business users and corporate networks using a combination of AES-128 (CTR mode) and RSA-2048 algorithms, and then requires a large ransom in BTC or Monero for the decryption key.

Cerber Ransomware encrypt Windows and Linux machines by exploiting Atlassian Confluence (CVE-2021-26084) and GitLab (CVE-2021-22205) servers remote code execution vulnerabilities.

Rook ransomware encrypts its victims files with AES in ECB mode and instruct them to contact them at rook@onionmail.org for ransom negotiations.

Blue Locker ransomware encrypts its victims files with AES + RSA and instruct them to contact them at grepmord@protonmail.com for ransom negotiations.