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Avast Antivirus is a family of cross-platform internet security applications developed by Avast for Microsoft Windows, macOS, Android, and iOS. Avast offers free and paid products that provide computer security , browser security , antivirus software , firewall , anti-phishing , antispyware, and anti-spam , among other services.
The tool could be used by ransomware victims to decrypt their files without paying the ransom. [15] As of February 2024, U.S. Department of State is offering rewards of up to $10 million for leads that could identify or locate ALPHV/Blackcat ransomware gang leaders. They are offering an additional $5 million reward for tips on people who take ...
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 ...
There are a number of tools intended specifically to decrypt files locked by ransomware, although successful recovery may not be possible. [2] [154] If the same encryption key is used for all files, decryption tools use files for which there are both uncorrupted backups and encrypted copies (a known-plaintext attack in the jargon of cryptanalysis.
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]
Even though the ransomware claimed TeslaCrypt used asymmetric encryption, researchers from Cisco's Talos Group found that symmetric encryption was used and developed a decryption tool for it. [9] This "deficiency" was changed in version 2.0, rendering it impossible to decrypt files affected by TeslaCrypt-2.0. [10]
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