It then stores the encrypted RN at the beginning of resulting file. ) To encrypt each file, KeRanger starts by generating a random number (RN) and encrypts the RN with the RSA key retrieved from the C2 server using the RSA algorithm. Test.docx) by first creating an encrypted version that uses the. and that they need to pay a sum of one bitcoin, which used to be roughly $400 in United States dollar. It then tells the user that their files have been encrypted, etc. After it connects with the Command and Control servers, it returns the data with a "README_FOR_DECRYPT.txt" file. These servers’ domains are all sub-domains of onionlink or onionnu, two domains that host servers only accessible over the Tor network. After it collects the information, it uploads it to one of its Command and Control servers. After that, it will collect information about the Mac, which includes the model name and the UUID. The first time it executes, KeRanger will create three files ".kernel_pid", ".kernel_time" and ".kernel_complete" under ~/Library directory and write the current time to ".kernel_time". "README_FOR_DECRYPTION.txt" file placed in all folders.
The ransomware is considered to be a variant of the Linux ransomware Linux.Encoder.1.
#Crypto virus mac how to
When the instructions are opened, it gives the victim directions on how to decrypt the files, usually demanding a payment of one bitcoin. The malware then creates a file, called "readme_to_decrypt.txt", in every folder. It encrypts the files with RSA and RSA public key cryptography, with the key for decryption only stored on the attacker's servers. When users click these infected apps, their bundle executable Transmission.app/Content/MacOS/Transmission will copy this General.rtf file to ~/Library/kernel_service and execute this "kernel_service" before any user interface appearing. rtf is actually a Mach-O format executable file packed with UPX 3.91. KeRanger is remotely executed on the victim's computer from a compromised installer for Transmission, a popular BitTorrent client downloaded from the official website.
#Crypto virus mac mac
Discovered on March 4, 2016, by Palo Alto Networks, it affected more than 7,000 Mac users. KeRanger (also known as ) is a ransomware trojan horse targeting computers running macOS.
0 kommentar(er)
