Ransom DDoS: why paying does not end the threat at all

Ransom DDoS is an extortion demand attached to a denial-of-service threat. Sometimes an attack accompanies it, sometimes a short demonstration precedes it, and sometimes there is nothing behind the message at all. The technical side is whatever family the traffic belongs to. What is different is that you are being asked to make a decision under time pressure.

Section Attacks Updated Shapes three

Quick facts

Layer
Any: the demand is separate from the technique
Vector
A message, with or without traffic behind it
Goal
Payment, not disruption
In your logs
Possibly nothing; the demand arrives by email
Does a WAF stop it?
It addresses the attack, not the demand

That last row is the honest framing. No product resolves an extortion attempt. What defences do is remove the lever the demand relies on.

The three shapes it takes

A threat with nothing behind it. A message announcing an attack on a future date unless payment arrives. Sending these costs nothing and they can be sent to thousands of organisations at once, so the sender does not need any capability for the approach to be profitable. Most recipients of this kind never see an attack.

A demonstration followed by a demand. A short burst of traffic, enough to be noticed, then a message referring to it. This is more serious, because capability has been shown, though the size of a demonstration says little about what can be sustained.

A demand during an ongoing attack. The pressure is real and immediate, and it is also the situation where a decision made in the first hour is most likely to be wrong.

THE MESSAGE AND THE TRAFFIC, THREE ARRANGEMENTS A THREAT WITH NOTHING BEHIND IT MESSAGE MOST RECIPIENTS OF THIS KIND NEVER SEE AN ATTACK A DEMONSTRATION FOLLOWED BY A DEMAND MESSAGE CAPABILITY SHOWN — THOUGH A BURST SAYS LITTLE ABOUT WHAT IS SUSTAINED A DEMAND DURING AN ONGOING ATTACK MESSAGE A DECISION MADE IN THE FIRST HOUR IS MOST LIKELY TO BE WRONG
// the technique belongs to a family; the demand belongs to nobody's roadmap

Judging whether a demand is credible

Four questions separate a bulk message from a targeted one.

Is anything specific to you in it? Bulk extortion mentions no detail that could not be scraped: your domain, an industry, a generic sum. Targeted messages reference infrastructure the sender had to look at.

Was anything demonstrated? A claim with no traffic behind it is a claim about the future made by someone with an incentive to exaggerate.

Is the timeline structured to prevent thinking? Short deadlines and escalating penalties are a pressure technique rather than an operational necessity.

Does the same message exist elsewhere? Bulk campaigns are widely reported, and the text is often identical between recipients. Checking whether others received the same message costs nothing and settles most cases.

Why paying does not resolve it

Four reasons, and they hold regardless of what the message promises.

Nothing is delivered in exchange. There is no product being sold. A payment buys a promise from an anonymous party with no obligation and no reputation to protect, and the only enforcement available to you is hoping.

It identifies you as someone who pays. That information has value to the recipient and to anyone they share it with. Organisations that pay are approached again, sometimes by different parties, sometimes with the previous payment cited as evidence that the approach works.

It funds the capability being used against you. Extortion continues because it is profitable, and each payment sustains the infrastructure that makes the next threat credible.

It changes nothing about your exposure. Whatever made you a viable target still applies the day after the payment clears. The absence of an attack afterwards is indistinguishable from an attack that was never coming.

AFTER THE PAYMENT CLEARS, TWO WORLDS YOU PAID — AND THE ATTACK WAS NEVER COMING PAYMENT NOTHING ARRIVES YOU PAID — AND THE PAYMENT WORKED PAYMENT NOTHING ARRIVES THE SAME PICTURE — YOU CANNOT TELL WHICH ONE YOU BOUGHT
// whatever made you a viable target still applies the day after

There is also a legal dimension that depends entirely on where you are and who the recipient turns out to be. Payments to sanctioned parties carry consequences separate from anything in the threat itself, which is a question for a lawyer before it is a question for an engineer.

What to do instead

Five steps, in order.

Do not reply. A response confirms the address is live and the recipient is engaged, which is the qualifying signal a bulk campaign is looking for.

Preserve the message. Full headers included. It is evidence, and it is also what lets anyone else determine whether the campaign is known.

Tell whoever carries your traffic. Your connectivity provider and any platform in front of you can prepare capacity and filtering before a deadline rather than during an incident. This is the single most useful call to make.

Report it. Extortion is a criminal matter in most jurisdictions, and reports are how bulk campaigns get identified as bulk.

Check what would actually happen. The deadline is a free opportunity to review capacity, rate limits, and whether anyone knows who to call. That work has value whether or not anything arrives.

Preparing without panicking

The useful posture is unglamorous and mostly consists of decisions made in advance.

Know where traffic terminates and who can absorb volume, because the answer determines whether an attack is your problem or your provider's. Know which of your endpoints are expensive, since those are what an application-layer attack will find. Have a way to reach the people who can act outside working hours, and agree beforehand who decides.

And decide the payment question now, in writing, while nobody is under pressure. A policy written calmly is what prevents a decision made at three in the morning by whoever happened to be awake.

Mitigation, honestly stated

The demand is not a technical event, and the traffic behind it is ordinary traffic belonging to one of the families described on DDoS attack types. Defence is therefore the same as it would be without the message: capacity for what saturates links, connection handling for what exhausts state, and request limits for what exhausts the application.

Bridge WAF covers the last of those: requests are inspected before reaching your origin, and rate limiting is applied per domain. Because traffic terminates at the edge, the capacity in front of you is the platform's rather than your link's. What no product provides is a resolution to the extortion itself, and any that claims to is selling something else. See what the platform offers at Bridge CDN.

Questions

What is ransom DDoS?

An extortion demand attached to a denial-of-service threat, which may or may not have any capability behind it. The message is the event: sometimes an attack accompanies it, sometimes a short demonstration precedes it, and sometimes there is nothing at all.

Should I pay?

The four arguments against are independent of each other: payment buys an unenforceable promise from an anonymous party, marks you as somebody who pays, funds the capability being used against you, and leaves your exposure exactly as it was. Legal consequences depend on jurisdiction and on who the recipient turns out to be.

Are these threats usually real?

Many are bulk messages sent to great numbers of organisations at once, with nothing behind them, because sending costs the sender nothing. What separates a targeted threat is specificity that could not be scraped, and traffic actually demonstrated rather than described.

What should I do first?

Three things, in order: do not reply, since a reply confirms a live and engaged recipient; preserve the message with its full headers as evidence; and tell whoever carries your traffic, so capacity and filtering can be arranged before the deadline rather than during an incident.

Does a WAF stop ransom DDoS?

It addresses the application-layer traffic, if traffic arrives at all, in exactly the way it would without any message attached. What no product resolves is the demand itself, and anything claiming to resolve extortion is selling something other than what it says.

Will they come back if I do not pay?

Possibly, and the odds are worse if you do pay. A payment is the clearest available signal that the approach works on you, and that information has value both to the recipient and to anybody they choose to share it with.

Where the platform sits

It addresses the traffic, in exactly the way it would without any message attached. The demand is not a technical event.

off

No request is inspected and no limit is counted.

monitor

What a limit would have refused is recorded — useful before a deadline rather than during one.

block

Requests past the allowance are refused at the edge, and still recorded.

The firewall layer is included with Bridge CDN. Start in monitor: nothing is refused until you decide it should be.

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