These are the cryptomixers hackers use to clean their ransoms

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Content source

https://www.bleepingcomputer.com/news/security/these-are-the-cryptomixers-hackers-use-to-clean-their-ransoms/

Cryptomixers have always been at the epicenter of cybercrime activity, allowing hackers to "clean" cryptocurrency stolen from victims and making it hard for law enforcement to track them.

When threat actors steal cryptocurrency or receive it as a ransom payment, law enforcement or researchers can see what cryptocurrency wallet the funds were sent to.

Mixers allow threat actors to deposit illicitly obtained cryptocurrency and then mix it in a large pool of "random" transactions.

This way, the original crypto gets muddled in a large collection of sums from many different and unknown sources.

When done, the "cleaned" crypto is sent to a different address owned by the threat actors that have not been used before and is unknown to law enforcement. For the use of this service, the cryptomixers take a commission (usually 1-3%) from the mixed cryptocurrency.

Absolutio also offers time-delay options to help introduce variations that will help strengthen the anonymization. Also, it promises to wipe all request data after two days.
The service claims that all the coins come from allowed addresses and reputable exchanges and that users won't get crypto from "shady" sources.

A gray area​

Analysts at Intel471 were able to find a wallet that belongs to Blender and report that between June 2020 and July 2020, it handled cryptocurrency transactions worth $3,400,000.

This indicates the business size of these platforms, which operate in a gray legal area, making tens of thousands of dollars per month, mostly coming from cybercrime activities.

Cryptocurrency mixing isn't intrinsically illegal and is commonly promoted as a privacy-boosting method.
However, if a mixer is knowingly assisting illegal operations in laundering their illicit proceeds, law enforcement will target them and shut down their operations.