Reverse DNS domains are only intended for internet infrastructure purposes, but DNS can be challenging to implement correctly and there are sometimes unintended behaviors. Figure 4 shows what happened when we performed a type A query on one of the reverse DNS domains in the phishing emails. DNS servers were queried until the authoritative server for the domain was found. In this case, the authoritative name servers were operated by Cloudflare. Using these name servers, the reverse DNS FQDN resolved to two IP addresses. Both IP addresses belonged to Cloudflare’s edge network, which hides the actual host of—in this case—the malicious content. Although reverse DNS domains aren’t supposed to work like this, the threat actors found a way to make it happen.
风险告知:有色ETF华宝跟踪中证有色金属指数,该指数基日为2013年12月31日,发布于2015年7月13日,其成分股构成将依据编制规则定期调整,历史表现不预示未来。本文提及的成分股仅为展示,不构成任何投资推荐,亦不代表基金管理人旗下产品的持仓或交易情况。基金管理人评定该基金风险等级为R3(中风险),适合风险承受能力为平衡型(C3)及以上的投资者,具体适当性匹配意见请以销售机构评估为准。本文所载所有信息仅供参考,投资者需对自身投资决策独立负责。本文中的任何观点、分析及预测均不构成投资建议,不对因使用本文内容产生的直接或间接损失承担责任。基金投资存在风险,过往业绩不预示未来表现,基金管理人其他基金的业绩不构成对本基金业绩的保证,投资需谨慎。
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