A few months ago we exclusively reported on a Dark Web vendor selling 1 Billion user accounts stolen Attack.Databreach from the Chinese Internet giants . Now , another vendor going by the handle of CosmicDark is selling Attack.Databreach a database containing 100,759,591 user accounts stolen Attack.Databreach from of Youku Inc. , a popular video service in China . The database according to vendor ’ s listing was leaked Attack.Databreach in 2016 and leaked Attack.Databreach on the Internet this year . Although it is unclear how the database was stolen Attack.Databreach CosmicDark is selling Attack.Databreach the whole package for USD 300 ( BTC 0.2559 ) . The data contains emails and passwords decrypted with MD5 & SHA1 hashes . According to the sample data ( 552 accounts ) provided by CosmicDark , most of the emails are based on @ 163.com , @ qq.com , and @ xiaonei.com . It must be noted that based on HackRead ’ s research the encrypted passwords provided in the sample data have already been decrypted and publically available on the Internet . Also , HaveIbeenpwned , a platform where you can check if your account has been compromised Attack.Databreach has also confirmed the breach Attack.Databreach . It is unclear whether Youku Inc. is aware of the breach or has notified its users , however it is evident that it poses a massive privacy threat to their users . Furthermore , vendors in the same marketplace are selling Attack.Databreach 21 million Gmail and Yahoo accounts , 640,000 decrypted PlayStation accounts , millions of accounts from 11 hacked Bitcoin forums and millions of accounts stolen Attack.Databreach from 25 hacked vBulletin forums .