OpenCyber Academy
Rapid course · Lesson 19 · English
Course code: OCA-015Lesson 19: OCA-015-A019

One restored client folder is not a resilience score

Open, free learning for anyone who wants to protect people and technology. No account is required to read this text or its worked answers.

Lesson map

Lesson 19. Map, example, EX065.

flowchart TD
  B["Backups already existed"] --> R["Recover was the only CSF part in place"]
  L["Leo's next test"] --> F["Restore one client folder"]
  F --> Q{"Does the book print a pass or a time?"}
  Q -->|No| K["The test stays a plan"]

A planned restore is not a sixth signal and not a score.

Logical drawing

CSF before the incident
  Protect, Detect, Respond: empty
  Recover: backups already in place
planned test: one client folder
printed score: none
signals: still four

Learning outcomes

After this chapter, you should be able to:

  1. Say which CSF part existed before the incident.
  2. Keep the folder restore as a plan.
  3. Refuse a fifth signal or a D3FEND score.

19.1 The restore is the next subject. This book does not grade it.

Before the incident, Protect, Detect, and Respond were empty. Backups, for Recover, were the only CSF part already in place. Leo's next topic is incident response and resilience. He would test the backups by restoring one client folder and asking whether the accounts software and client files could come back quickly. "Quickly" is not given a minute count in this book. The restore is not recorded as passed or failed. One folder is not every client folder, and it is not a resilience score.

The four signals stay four. A restore test does not watch a mailbox. Adding it as a fifth signal would mix Recover with Detect. D3FEND (Kaloroumakis and Smith, 2021) is a knowledge graph of countermeasures. This book names it and does not score a countermeasure identifier against the folder. No second script prints a restore result.

Incident response would also turn the mailbox playbook into short playbooks for other events, such as a lost laptop or a ransomware note. Those playbooks are not written here. The next course is where that work continues. This chapter does not invent their steps.

Lesson table; scroll horizontally to read all columns →

Item Status in this book
Backups before the incident Already in place
One client folder A planned test
Pass, fail, or duration Not printed
Fifth signal Not added
D3FEND identifier Not scored

19.2 Worked example

Lesson table; scroll horizontally to read all columns →

Offered conclusion What the book actually has Decision
"Recover was the part already in place." Backups existed Keep
"The test Leo plans is one folder." A plan, not a result Keep
"The restore passed in four minutes." No duration is printed Refuse
"Folder restore is signal number five." The signals stay four Refuse

Synthetic case. No restore log is embedded.

Errors and limits

Do not print a pass mark for a test this book does not run.

Apply

  • EX065 — One folder. Which CSF part was already in place, what does Leo plan to restore, and why is that plan not a score or a fifth signal?
    Show marking criteria
    Rubric: 3 = backups, for Recover, were already in place; he plans to restore one client folder; no pass, fail, or duration is printed; the four signals stay four;; 2 = the plan stays a plan and the signals stay four;; 1 = one fact;; 0 = none.
Worked answers

EX065. Backups, for Recover, were already in place. Leo plans to restore one client folder. No pass, fail, or duration is printed, and the four signals stay four.