RainbowCrack is a tool tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed January 15, 2026; most recent activity January 15, 2026.
Mandiant has released rainbow tables that can crack credentials using the Net-NTLMv1 protocol within 12 hours. This legacy Microsoft authentication protocol has been known to expose users to credential theft for over 20…