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Suspected code responsible for LIHKG DDoS on 2019-08-31. Back up as a research topic

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UTC+8 2019-08-31 23:32

有網友[1]發現多個大陸網站(如百度貼吧)入面加入咗啲 code,會令到瀏覽器自動向 #LIHKG 產生大量流量。

初步調查發現疑似 qihucdn 網域會喺特定情況將佢哋 host 嘅 JavaScript 檔加料,似乎大陸好多網站都會用到呢個 #CDN。而唔係每一次 load 都會出事,未知用咩準則。試過好幾次都無事。

類似手法其實喺 2015 年針對 GitHub 嘅大型 #DDoS 攻擊已經用過[2]。

建議大家非必要就唔好上任何大陸網住,以免成為幫兇。尤其已經過咗 CAPTCHA 嗰啲。

p.s. 寫緊呢篇嘅同時,LIHKG 死咗幾下... HTTP502 而家 web 版去 LIHKG 要先喺 CloudFlare 做 CAPTCHA 👍👍

p.s. 唔記得多謝提供資料同埋幫手 deobfuscate 嘅朋友同朋友嘅朋友 🤗

-- [1] https://lihkg.com/thread/1522162/ [2] https://www.cloudflare.com/learni…/ddos/famous-ddos-attacks/


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Suspected code responsible for LIHKG DDoS on 2019-08-31. Back up as a research topic

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