node.js - Malware in redis keys -


i using open source version of prerender cache links of website. links stored using redis keys. website , prerender servers deployed in google compute engine.

recently, while going through cpu usage of server, observed 80-90% usage. so, checked dbsize , keys in redis , got lot of links http://adserver.adtechus.com/addyn/3.0/10125.1/4264818/0/170/adtech;loc=100;target=_blank;misc=1478214490384

i googled , got know sort of malware. tried following:

  1. stopping prerender server , deleting keys redis , starting server again. malware comes start server.

  2. changed ip of prerender server google cloud, , malware links stopped appearing in redis keys.

i want understand have caused problem , how can avoid in future.


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