{"id":196571,"date":"2021-08-11T06:00:03","date_gmt":"2021-08-11T05:00:03","guid":{"rendered":"https:\/\/cryptoslate.com\/?p=196571"},"modified":"2021-08-11T04:36:54","modified_gmt":"2021-08-11T03:36:54","slug":"the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist","status":"publish","type":"post","link":"https:\/\/cryptoslate.com\/the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist\/","title":{"rendered":"The biggest DeFi hit ever: Poly Network sees $600 million crypto heist"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">A decentralized finance (<\/span><a href=\"https:\/\/cryptoslate.com\/cryptos\/defi\/\"><span style=\"font-weight: 400;\">DeFi<\/span><\/a><span style=\"font-weight: 400;\">) cross-chain bridging protocol Poly Network recently announced that it has suffered an attack in which the hacker stole over $600 million across three blockchains.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The cross-chain interoperability network flagged the attacker\u2019s addresses on Twitter, which revealed the extent of a massive exploit, urging miners of the affected blockchains and crypto exchanges to blacklist tokens coming from the hacker.<\/span><\/p>\n<h2><strong>Historical heist<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">The combined value of stolen crypto exceeds $600 million on three blockchains, totaling roughly $273M on Ethereum, approximately $253M on Binance Smart Chain, and close to 85M on Polygon.\u00a0<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">Important Notice:<br \/>We are sorry to announce that <a href=\"https:\/\/twitter.com\/hashtag\/PolyNetwork?src=hash&ref_src=twsrc%5Etfw\">#PolyNetwork<\/a> was attacked on <a href=\"https:\/\/twitter.com\/BinanceChain?ref_src=twsrc%5Etfw\">@BinanceChain<\/a>  <a href=\"https:\/\/twitter.com\/ethereum?ref_src=twsrc%5Etfw\">@ethereum<\/a>  and <a href=\"https:\/\/twitter.com\/0xPolygon?ref_src=twsrc%5Etfw\">@0xPolygon<\/a> Assets had been transferred to hacker&#39;s following addresses:<br \/>ETH: 0xC8a65Fadf0e0dDAf421F28FEAb69Bf6E2E589963<br \/>BSC: 0x0D6e286A7cfD25E0c01fEe9756765D8033B32C71<\/p>\n<p>&mdash; Poly Network (@PolyNetwork2) <a href=\"https:\/\/twitter.com\/PolyNetwork2\/status\/1425073987164381196?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">After a preliminary investigation, the hacked protocol located the cause of the vulnerability, claiming that the attacker exploited a vulnerability between contract calls as it urged miners of the affected blockchains and crypto exchanges to blacklist tokens coming from the disclosed addresses.\u00a0<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">After preliminary investigation, we located the cause of the vulnerability. The hacker exploited a vulnerability between contract calls, exploit was not caused by the single keeper as rumored.<\/p>\n<p>&mdash; Poly Network (@PolyNetwork2) <a href=\"https:\/\/twitter.com\/PolyNetwork2\/status\/1425130017546149891?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">\u201cWe will take legal actions and we urge the hackers to return the assets,\u201d said Poly Network on Twitter, while trying to establish communication with the attacker, inviting the new DeFi millionaire to talk to the protocol in order to \u201cwork out a solution.\u201d<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"und\" dir=\"ltr\"><a href=\"https:\/\/t.co\/Yzw4oDenjC\">pic.twitter.com\/Yzw4oDenjC<\/a><\/p>\n<p>&mdash; Poly Network (@PolyNetwork2) <a href=\"https:\/\/twitter.com\/PolyNetwork2\/status\/1425123153009803267?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<h2><strong>Actions and reactions<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Following the attack, Tether, the world\u2019s largest stablecoin, froze roughly $33 million in <\/span><a href=\"https:\/\/cryptoslate.com\/coins\/tether\/\"><span style=\"font-weight: 400;\">USDT<\/span><\/a><span style=\"font-weight: 400;\"> associated with the alleged hacker's wallet address, which led to ideological remarks on Twitter, questioning how decentralized is the DeFi corner of the space?<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\"><a href=\"https:\/\/twitter.com\/paoloardoino?ref_src=twsrc%5Etfw\">@paoloardoino<\/a> whatever happened to decentralization?<\/p>\n<p>&mdash; Long and Short (mostly long) (@foolsbookie) <a href=\"https:\/\/twitter.com\/foolsbookie\/status\/1425092351513477135?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">Meanwhile, some of the biggest crypto exchange operators spoke out, offering their help and support, including Binance CEO Changpeng Zhao, Huobi co-founder Du Jun and OKEx CEO Jay Hao.<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">We are aware of the <a href=\"https:\/\/t.co\/IgGJ0598Q0\">https:\/\/t.co\/IgGJ0598Q0<\/a> exploit that occurred today. While no one controls BSC (or ETH), we are coordinating with all our security partners to proactively help. There are no guarantees. We will do as much as we can. Stay <a href=\"https:\/\/twitter.com\/hashtag\/SAFU?src=hash&ref_src=twsrc%5Etfw\">#SAFU<\/a>. ? <a href=\"https:\/\/t.co\/TG0dKPapQT\">https:\/\/t.co\/TG0dKPapQT<\/a><\/p>\n<p>&mdash; CZ ? Binance (@cz_binance) <a href=\"https:\/\/twitter.com\/cz_binance\/status\/1425091869709570060?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">.<a href=\"https:\/\/twitter.com\/OKEx?ref_src=twsrc%5Etfw\">@OKEx<\/a> is already on the case. We&#39;re watching the flow of coins, and will do our best to manage the situation.<\/p>\n<p>Our wallet team will get in touch if we need more information. <a href=\"https:\/\/t.co\/crD296bNdQ\">https:\/\/t.co\/crD296bNdQ<\/a><\/p>\n<p>&mdash; Jay_OKEX_CEO (@JayHao8) <a href=\"https:\/\/twitter.com\/JayHao8\/status\/1425094897976193034?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">While centralized exchanges also reacted showing support to the hacked protocol, blockchain security intelligence keeps trying to define the exploited vulnerability by retracing the attacker's steps.\u00a0<\/span><\/p>\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\">\n<p lang=\"en\" dir=\"ltr\">The  <a href=\"https:\/\/twitter.com\/hashtag\/PolyNetwork?src=hash&ref_src=twsrc%5Etfw\">#PolyNetwork<\/a> hack is possibly the largest crypto hack so far.  Is the root cause due to a *SINGLE* compromised signer key? Here is the hack flow!!! <a href=\"https:\/\/t.co\/GphK5e7Its\">pic.twitter.com\/GphK5e7Its<\/a><\/p>\n<p>&mdash; PeckShield Inc. (@peckshield) <a href=\"https:\/\/twitter.com\/peckshield\/status\/1425119080827215876?ref_src=twsrc%5Etfw\">August 10, 2021<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<p><span style=\"font-weight: 400;\">In anticipation of the protocol\u2019s post mortem&#8230;<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A decentralized finance (DeFi) cross-chain bridging protocol Poly Network recently announced that it has suffered an attack in which the hacker stole over $600 million across three blockchains. The cross-chain interoperability network flagged the attacker\u2019s addresses on Twitter, which revealed the extent of a massive exploit, urging miners of the affected blockchains and crypto exchanges [&hellip;]<\/p>\n","protected":false},"author":699,"featured_media":196574,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46940,16041],"tags":[72860],"post_folder":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.9 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The biggest DeFi hit ever: Poly Network sees $600 million crypto heist<\/title>\n<meta name=\"description\" content=\"A cross-chain bridging protocol Poly Network suffered a historic attack as the hacker stole over $600 million across three blockchains.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptoslate.com\/the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The biggest DeFi hit ever: Poly Network sees $600 million crypto heist\" \/>\n<meta property=\"og:description\" content=\"A cross-chain bridging protocol Poly Network suffered a historic attack as the hacker stole over $600 million across three blockchains.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cryptoslate.com\/the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist\/\" \/>\n<meta property=\"og:site_name\" content=\"CryptoSlate\" \/>\n<meta property=\"article:published_time\" content=\"2021-08-11T05:00:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-08-11T03:36:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2021\/08\/polynetwork-hack.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Ana Grabundzija\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@cryptoslate\" \/>\n<meta name=\"twitter:site\" content=\"@cryptoslate\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ana Grabundzija\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"NewsArticle\",\"@id\":\"https:\/\/cryptoslate.com\/the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/cryptoslate.com\/the-biggest-defi-hit-ever-poly-network-sees-600-million-crypto-heist\/\"},\"author\":{\"@type\":\"Person\",\"@id\":\"https:\/\/cryptoslate.com\/author\/ana-grabundzija\/#person\",\"name\":\"Ana Grabundzija\",\"url\":\"https:\/\/cryptoslate.com\/author\/ana-grabundzija\/\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/cryptoslate.com\/author\/ana-grabundzija\/\"},\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/cryptoslate.com\/author\/ana-grabundzija\/#authorimage\",\"url\":\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2021\/05\/cs-author-ana-300x300.jpg\",\"contentUrl\":\"https:\/\/cryptoslate.com\/wp-content\/uploads\/2021\/05\/cs-author-ana-300x300.jpg\",\"caption\":\"Ana Grabundzija\"},\"jobTitle\":\"Journalist\",\"description\":\"Dr. Ana Grabundzija is a Zagreb-bred writer with an academic background in anthropology. 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