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[citation needed] A minor in Japan was arrested for creating and distributing ransomware code. [167] Young and Yung have had the ANSI C source code to a ransomware cryptotrojan on-line, at cryptovirology.com, since 2005 as part of a cryptovirology book being written. The source code to the cryptotrojan is still live on the Internet and is ...
Conti ransomware employs various stealth techniques, including the use of BazarLoader, to infiltrate its target systems. The ransomware is designed to encrypt files and render them inaccessible until a ransom is paid. It is often delivered through phishing emails, exploit kits, or compromised websites. [1]
Hidden Tear is the first open-source ransomware trojan that targets computers running Microsoft Windows [1] The original sample was posted in August 2015 to GitHub. [2]When Hidden Tear is activated, it encrypts certain types of files using a symmetric AES algorithm, then sends the symmetric key to the malware's control servers. [3]
CryptoLocker typically propagated as an attachment to a seemingly innocuous e-mail 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.
Later globally dispersed security researchers collaborated online to develop open-source tools [172] [173] that allow for decryption without payment under some circumstances. [174] Snowden states that when "NSA-enabled ransomware eats the Internet, help comes from researchers, not spy agencies" and asks why this is the case. [171] [175] [176]
Change Healthcare paid a $22 million ransom to recover data after the attack. However, a payment dispute between BlackCat and an affiliate involved with the attack has resulted in a BlackCat representative claiming that the group is shutting down and selling the source code for its ransomware products.
Rhysida is a ransomware group that encrypts data on victims' computer systems and threatens to make it publicly available unless a ransom is paid. [1] The group uses eponymous ransomware-as-a-service techniques, targets large organisations rather than making random attacks on individuals, and demands large sums of money to restore data. [2]
Rensenware is unusual as an example of ransomware in that it does not request the user pay the creator of the virus to decrypt their files, instead requiring the user to achieve a required number of points in the bullet hell game Touhou Seirensen ~ Undefined Fantastic Object before any decryption can take place.