The signal behind the case
A domain-controller log-clearing event revealed an intrusion that had progressed through the network.
Reconstructing the attack
The investigation traced entry through an unrestricted internet-facing RDS server, followed by lateral movement, privileged-credential harvesting and domain-controller access. Threat intelligence connected the attacker to ransomware activity.
Containing the threat
CYREBRO’s DFIR team found the deployed ransomware before execution, removed the attacker and performed incident response from scoping through recovery. Threat hunting examined residual activity and attempts to regain access.
The work concluded with an incident report and recommendations to improve security hygiene. Existing telemetry collection supported a rapid investigation.