OT security lab · Level 8 of 8
Incident drill: a simulated note on an operator screen
Level 8 of 8 in the OT security lab: a free OT security exercise at Advanced level. A simulated ransomware note appears on one operator screen. Run the response in the right order without stopping the plant unsafely.
Free · no download. Your work is saved on this device. Updated 18 Oct 2026.
The brief
- Client
- Northfield Biscuit Works
- Site
- Bakery line control room, Northfield
- Work order
- WO-OTS-108
- Task code
- OTS-08
- Difficulty
- Advanced
- Type of work
- Response
A simulated ransomware note appears on one operator screen. Run the response in the right order without stopping the plant unsafely.
Skills you practise
- Incident response order
- Containing without stopping safety
- Preserving evidence
- Recovering from known-good backups
What the test checks
The acceptance test marks the skills this level practises.
- Incident response order
- Containing without stopping safety
- Preserving evidence
- Recovering from known-good backups
In this lab
- Purdue levels, zones and conduits
- Firewall rules, remote access and logs
- Patch plans, backups and an incident drill
Levels in the OT security lab
Previous: Backup and recovery: known-good copies and a proved restore
- Map the plant network: put every device on its level
- Zones and conduits: split a flat network
- Firewall rules: the minimum, then deny by default
- Remote access: the vendor comes in through the DMZ
- Spot the intruder: the events that matter in a day's log
- Patch or protect: choose within the maintenance window
- Backup and recovery: known-good copies and a proved restore
- Incident drill: a simulated note on an operator screen
Part of the OT security lab
Map a plant network, split it into zones, write the firewall rules, read the logs and run the response drill.
Feeds these internships: SCADA and HMI.