science

RagnarLocker

RagnarLocker is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand RagnarLocker rather than just read about it. In short: RagnarLocker (sometimes written "Ragnar Locker") is a ransomware hacker group which uses virtual machine escape techniques to encrypt victim's system files. It first surfaced in December 2019.

Key takeaways

RagnarLocker belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect RagnarLocker to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of RagnarLocker from memory before moving on to harder problems.

Reference excerpt

RagnarLocker (sometimes written "Ragnar Locker") is a ransomware hacker group which uses virtual machine escape techniques to encrypt victim's system files. It first surfaced in December 2019.

History First appearing at the end of 2019, (likely originating from Eastern Europe considering that it does not attack computers in former USSR countries,) it carried out its first major attack on the Portuguese electric company Energias de Portugal, where it demanded a ransom of 10.9 million dollars and threatened to leak 10 terabytes of data. During 2022, it also attacked video game company Capcom, and the beverage company Campari.

Function Ragnar Locker operates by using an eponymously named malware called RagnarLocker. First, the dropper (usually delivered through a vulnerability in Remote Desktop Protocol) checks the operating system. If it's set to a language used in the former Soviet Union, it stops. Otherwise, it starts by sending a copy of system files to its central server and then downloads a package containing a version of VirtualBox configured to display the host computer and an image of Windows XP that contains the malware, which itself is only about 49 kB in size. The dropper, after disabling security-related services or services that could keep logs active (like DBMS software), launches the virtual machine and the ransomware via a batch script. The ransomware begins encrypting files on the host computer without raising suspicion, since the commands appear to come from VirtualBox rather than the ransomware itself. At the end of the process, a personalized ransom note is left behind on the victim's computer.

Arrests Between the days of October 16 and 20, 2023, Europol and Eurojust conducted a series of seizures and arrests in Czechia, Spain and Latvia in response to RagnarLockers criminal activity. On October 20, an alleged main suspect and developer, had been brought in front of examining magistrates of the Paris Judicial Court. The ransomware's infrastructure was also seized in the Netherlands, Germany and Sweden and the associated data leak website on Tor was taken down in Sweden.

References

Worked examples

Example 1 — a first encounter with RagnarLocker

Start with the simplest possible case. Write down what RagnarLocker claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to RagnarLocker before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about RagnarLocker ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of RagnarLocker

In research: RagnarLocker appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses RagnarLocker in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: RagnarLocker is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hacker groups, Organizations established in 2019, Ransomware, so understanding it makes those chapters shorter.
In everyday life: Look for RagnarLocker outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study RagnarLocker in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RagnarLocker means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain RagnarLocker out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RagnarLocker in simple terms?

RagnarLocker (sometimes written "Ragnar Locker") is a ransomware hacker group which uses virtual machine escape techniques to encrypt victim's system files. It first surfaced in December 2019.

Why does RagnarLocker matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study RagnarLocker?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on RagnarLocker.