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对Wintermute项目指控的简要分析

Code Auditing
September 27, 2022
2 min read

在调查了 James Edwards (@libreshash) 发表的题为《Wintermute 黑客事件分析:内鬼作案》(Analysis of the Wintermute Hack: An Inside Job)的报告后,我们认为该报告对 Wintermute 项目的指控并不像作者声称的那样确凿。

0x1. 账户 0x0000000fe6a514a32abdcdfcc076c85243de899b 的权限

报告仅仅查询了映射变量 _setCommonAdmin 中该账户的当前状态,但这样做并不合理,因为项目方在知晓攻击后可能会采取措施撤销管理员权限。

_setCommonAdmin[0x0000000fe6a514a32abdcdfcc076c85243de899b] 的存储槽位键为 0x1488acaeec0884899a8f09209808003200bbe32c28e8f074961d28a1dc78daa1,我们已据此调查了历史存储变化。 结果显示,该值在以下两个交易中被修改了两次:

  • 0x37ab1d41fe3fa405b993c72ad9812d2074d55639f31ead8db2668993f3028f2a(在区块 15007314);
  • 0x3456571463b98eb253bfd894f06ed706073942a89fb21c42fc12ea56c190b528(在区块 15575003)。

第一次修改仅将值从 0 更改为 1;而第二次将值从 1 更改为 0,如下所示: image

请注意,报告中分析的攻击发生在区块 15572515(0xd2ff7c138d7a4acb78ae613a56465c90703ab839f3c8289c5c0e0d90a8b4ce16),这个时间点位于第一次修改和第二次修改之间

显然,第二次修改该值意味着项目方刚刚撤销了该账户的管理员权限。

0x2. 可疑活动

报告将以下活动视为可疑:

但这并没有它声称的那么有说服力。攻击者可以监控转账交易的活动来达到目的。从技术角度来看,这并不奇怪。例如,存在一些链上 MEV 机器人,它们会持续监控交易以获取利润。

0x3. 结论

简而言之,这份报告的证据不足以指控 Wintermute 项目。

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