KillDisk is a type of malware ransomware It encrypts the contents of the hard drive when it infects a system. This type of malware aims to raise money, since "hijackers" usually ask for money to give you the password with which you can decrypt the data on your hard drive and recover it. In some cases, some "weaknesses" in this type of infection can be exploited to be able to recover the data without paying, but this is not the case in all cases.
If you do not have a backup of your data and it is valuable, being infected by one of these could be catastrophic. Well, we have already talked about several ransomware on this website that affect Linux, and now the very ESET IT security company has detected a variant of KillDisk affecting Linux also.
It is a threat classified as serious, since by encrypting the system it makes it impossible to start up in this case, endangering the computers and data stored on them. It would be especially harmful if it infects company systems that contain valuable data. But as I have said in the previous paragraphs, not all ransomwares are infallible, and fortunately this one is not, since ESET has found a weakness that allows you to recover the data by removing the encryption.
In addition, they warn that you should not pay ransoms that can sometimes range from a few hundred euros to thousands of them. Therefore, they are expensive ransoms, the amounts are even increased depending on the relevance of the encrypted data and the interest that the victim has in recovering them. But experts advise not to pay these cybercriminals, since sometimes not even paying is guaranteed that they keep their word and give the password to be able to decipher the content ...