Case Study — Manufacturing

Manufacturing Company Ransomware Recovery

How a mid-sized manufacturer recovered from a LockBit ransomware attack that encrypted production systems across 3 facilities — restoring critical operations in 48 hours with zero data loss.

48 hrs

Production Restored

Zero

Data Loss

12 days

Full Recovery

Ransom Paid

The Organization

A mid-sized precision manufacturing company with approximately 800 employees across 3 production facilities and a corporate headquarters. The company manufactures components for the aerospace and automotive industries, operating CNC machines, industrial robots, and quality control systems connected to their IT network. Annual revenue exceeded $200 million, with production downtime costing approximately $150,000 per hour across all facilities.

The Attack

On a Saturday morning at 3:17 AM, LockBit ransomware began encrypting systems across the company's network. The attackers had gained initial access 11 days earlier through a compromised VPN credential obtained via a phishing email sent to an engineer. During those 11 days, the attackers performed reconnaissance, moved laterally using stolen credentials, identified backup systems, and staged data for exfiltration.

The encryption was devastating: ERP system (SAP), engineering file servers containing CAD drawings and specifications, production scheduling systems, quality management databases, and email servers were all encrypted. Critically, the attackers had also encrypted the company's primary backup server, which was network-accessible. All three production facilities were forced to halt operations.

The ransom demand was $3.5 million in Bitcoin, with a threat to publish stolen engineering drawings and customer data on the LockBit dark web leak site.

Our Response

Hours 0-4: Triage and Containment

Our IR team was on-site within 2 hours of the call. We immediately isolated all network segments, disabled external connectivity, and began forensic imaging of key systems. We identified the LockBit variant and confirmed the initial access vector through VPN logs. Critically, we discovered that the company's tape backup rotation — which had been maintained by an IT administrator as a personal practice — had an offline tape set from 3 days before the attack.

Hours 4-24: Investigation and Planning

We mapped the attacker's full path through the network: compromised VPN credential, lateral movement via RDP to domain controllers, Mimikatz for credential harvesting, and rclone for data exfiltration to a Mega cloud account. We identified all persistence mechanisms (4 backdoor accounts, 2 scheduled tasks, 1 malicious service) and developed a comprehensive eradication and recovery plan. We advised the client not to pay the ransom.

Hours 24-48: Critical System Recovery

We rebuilt domain controllers from clean images, restored the ERP system and production scheduling from the offline tape backups, and brought one production facility online with enhanced monitoring. We verified all attacker persistence was removed and implemented emergency security controls: new MFA for all VPN access, EDR deployed to all endpoints, and network segmentation between IT and OT.

Days 3-12: Full Recovery

The remaining two facilities were brought back online on days 3 and 4. Engineering file servers were restored from tape backups with minimal data loss (3 days of engineering changes were manually recreated from revision history). Email was restored on day 5. Quality management and remaining systems were restored over the following week. Continuous monitoring confirmed no signs of re-compromise.

Security Improvements

Following recovery, we implemented a comprehensive security program to prevent recurrence:

Deployed EDR with 24/7 SOC monitoring across all endpoints and servers

Implemented air-gapped backup architecture with immutable cloud backups and weekly tested restores

Segmented IT and OT networks with strict firewall rules and jump servers

Deployed phishing-resistant MFA (FIDO2 keys) for all VPN and privileged access

Established vulnerability management program with weekly scanning and 72-hour SLA for critical patches

Conducted company-wide security awareness training with monthly phishing simulations

Created and tested a ransomware-specific incident response plan through quarterly tabletop exercises

Engaged Ransomware Defenders on an annual IR retainer with 1-hour response SLA

Key Takeaways

1.Offline backups saved the day. The only reason recovery was possible without paying the ransom was a single offline tape backup set. This was not part of the official backup strategy — it was one administrator's personal practice. Luck should never be a backup strategy.
2.11 days of dwell time was preventable. EDR would have detected the lateral movement and credential harvesting within hours of initial access. The 11-day window gave attackers time to find and encrypt backups.
3.MFA would have prevented initial access. The compromised VPN credential worked because MFA was not required. A $5/month/user MFA solution would have prevented a multi-million dollar incident.
4.OT/IT segmentation is critical for manufacturing. The flat network allowed ransomware to spread from an engineer's workstation to production systems across all facilities simultaneously.

Protect Your Manufacturing Operations

Do not wait for an attack to expose gaps in your defenses. Our team can assess your environment and implement the controls that prevent incidents like this one.