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Chinese Ransomlock Malware Changes Windows Login Credentials

Chinese Ransomlock Malware Changes Windows Login Credentials: Although ransomware has become an international problem, we rarely see Chinese versions. Recently, Symantec Security Response noticed a new type of ransomlock malware that not only originates from China but also uses a new ransom technique to force users into paying to have their computers unlocked.

This threat is written in Easy Programming Language and is spread mostly through a popular Chinese instant messaging provider. Once a computer is compromised, the threat changes the login credentials of the current user and restarts the system using the newly created credentials. The login password is changed to “tan123456789” (this was hardcoded in the sample we acquired) but the malware author may update the threat and change the password. The account name is changed to “contact [IM ACCOUNT USER ID] if you want to know the password” (English translation)so that once the computer has restarted, and the user is unable to log in, they will see the account name/message and contact the user ID in order to get the new password.