Security researchers have reported on one of the fastest-growing and most formidable Ransomware-as-a-Service (RaaS) groups of 2025. Named “BlackLock” (aka El Dorado or Eldorado), the RaaS outfit has existed since March 2024, according to ReliaQuest, and has increased its number of data leak posts by an impressive 1425% quarter-on-quarter in Q4 of last quarter.
The threat intelligence vendor claimed that BlackLock could become the most active RaaS group in 2025. Although, like many other variants
