Ransomware stealed about 2.6 billion yen in 5 months

It turns out that ransomware called Netwalker has made $ 25 million (about 2.6 billion yen) in the last five months.

Mcafee researches this ransomware and summarizes it in an article.

Track bitcoin and calculate the damage amount

The company said, "The total amount of bitcoin, which was revealed by tracking these Netwalker -related address transactions, was 2795 Bitcoin between March 1st and July 27, 2020.. He wrote that a total of $ 25 million (approximately 2.6 billion yen) had been shaken from the past exchange rates from Bitcoin to US dollars.

In addition, organizations that operate Netwalker have agreed that they will not target hospitals during this pandemic.

Interestingly, this ransomware has been improved.Netwalker (or Mailto) in the original version used emails to interact with the victims.Currently, the victim has been changed to a specification that the victim enters the "user key" and exchanges via the tor browser.Segwit addresses are now used for remittance to "reduce the speed of transactions and transaction fees".

According to Mcafee, "Netwalker's advertisement in the dark forum when this change was seen, the advertisement of Netwalker mentioned immediately was mentioned on automatic payments. Ransomware actors were specializing in business.We think. "As long as you pay a ransom, you will be able to download a tool to decrypt a file encrypted by ransomware.

During the quarter, ransomware attacks that take millions of dollars to corporate opponents have been a series of ransomware attacks, but will it continue in this condition in the future?

Source: Mcafee, Bleeping Computer,

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