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The first attacks were on random users, typically infected through email attachments sent by small groups of criminals, demanding a few hundred dollars in cryptocurrency to unlock files (typically a private individual's photographs and documents) that the ransomware had encrypted. As ransomware matured as a business, organised gangs entered the ...
Jigsaw was designed in April 2016 and released a week after creation. [1] It was designed to be spread through malicious attachments in spam emails. [3] Jigsaw is activated if a user downloads the malware program which will encrypt all user files and master boot record. [4]
If the user does enable macros, they save and run a binary file that downloads the actual encryption Trojan, which will encrypt all files that match particular extensions. Filenames are converted to a unique 16 letter and number combination. Initially, only the .locky file extension was used for these encrypted files.
Ransomware operations often put two kinds of pressure on a victim organization: by encrypting their computers to lock out their owners and by publishing private, potentially sensitive hacked ...
CryptoLocker typically propagated as an attachment to a seemingly innocuous email message, which appears to have been sent by a legitimate company. [5] A ZIP file attached to an email message contains an executable file with the filename and the icon disguised as a PDF file, taking advantage of Windows' default behaviour of hiding the extension from file names to disguise the real .EXE extension.
It uses stronger encryption (RSA-1024 and AES-256) and physically overwrites the encrypted file, making recovery nearly impossible. [ 9 ] Kaspersky Lab has been able to make contact with the author of the program, and verify that the individual is the real author, but have so far been unable to determine his real world identity.
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