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other: 未知的obfuscator派系混淆 #74

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xiaodan01 opened this issue Feb 23, 2024 · 7 comments
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other: 未知的obfuscator派系混淆 #74

xiaodan01 opened this issue Feb 23, 2024 · 7 comments

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@xiaodan01
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https://note.ms/bgkq

Sent from PPHub

@echo094 echo094 changed the title 大佬,这种是新的加密吗 other: 未知的obfuscator派系混淆 Feb 23, 2024
@echo094
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echo094 commented Feb 23, 2024

https://note.ms/bgkq

我可以确定:

  1. 这不是原版obfuscator
  2. 用同样的方法经过了10层左右的嵌套混淆

不确定的是这种特征是否具有普遍性(或者说这个工具是否被公开使用)。

其实你稍微改一下现有的obfuscator插件就能够适配了。

@xiaodan01
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还请大佬指点迷津

@echo094
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echo094 commented Feb 24, 2024

这个例子的改进还是有点东西的:

  1. 有几个string-array相关的变量名在全局不唯一,导致现有的插件在处理时出现异常(这个目前可以通过在开始阶段将变量重命名解决)。我现在也在思考更普适的解决方案(通过这个样本,我想到了几种新的混淆套路,能够大大增加还原的难度)。
  2. 修改了string-array相关函数的特征(针对其特征修改匹配方法即可)。但由于缺少混淆工具的信息,并不能知道其更新频率,因此现阶段不适合更新到obfuscator插件中。

@xiaodan01
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xiaodan01 commented Feb 24, 2024 via email

@echo094
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echo094 commented Feb 24, 2024

那你先试试 obfuscator_variant 分支吧

@xiaodan01
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xiaodan01 commented Feb 24, 2024 via email

@xiaodan01
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那你先试试 obfuscator_variant 分支吧

可以,这次数也太多了,反复解,目前可以用,感谢大佬深夜付出

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