Backdoor spreading failed

[PerchunPak]

[20:10:39 ERROR]: Error occurred while enabling ChatEx v2.7.1 (Is it up to date?)
java.lang.NoClassDefFoundError: javassist/DirClassPath
        at javassist.ClassPoolTail.makePathObject(ClassPoolTail.java:267) ~[?:?]
        at javassist.ClassPoolTail.appendClassPath(ClassPoolTail.java:249) ~[?:?]
        at javassist.ClassPool.appendClassPath(ClassPool.java:1004) ~[?:?]
        at com.thiccindustries.debugger.Injector.patchFile(Injector.java:146) ~[?:?]
        at com.thiccindustries.debugger.Debugger.<init>(Debugger.java:70) ~[?:?]
        at de.jeter.chatex.ChatEx.onEnable(ChatEx.java:57) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[kSpigot.jar:git-Paper-33d42c8e]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:316) ~[kSpigot.jar:git-Paper-33d42c8e]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) ~[kSpigot.jar:git-Paper-33d42c8e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:395) ~[kSpigot.jar:git-Paper-33d42c8e]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:344) ~[kSpigot.jar:git-Paper-33d42c8e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:442) ~[kSpigot.jar:git-Paper-33d42c8e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:403) ~[kSpigot.jar:git-Paper-33d42c8e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:341) ~[kSpigot.jar:git-Paper-33d42c8e]
        at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:289) ~[kSpigot.jar:git-Paper-33d42c8e]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:616) ~[kSpigot.jar:git-Paper-33d42c8e]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_311]
Caused by: java.lang.ClassNotFoundException: javassist.DirClassPath
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_311]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:156) ~[kSpigot.jar:git-Paper-33d42c8e]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:104) ~[kSpigot.jar:git-Paper-33d42c8e]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_311]
        ... 17 more

[MajesticWaffle]

Looks like a class from the javassist library that needs to be added to the resource paths in Injector.java.

I added all the ones needed on my end, maybe that one is only needed on windows?

Either way, that should fix it.

[PerchunPak]

So I tried reproduce it with debug messages, and seems like it is because plugin doesn't delete files after first patch, which ended with exception (example "File already in process") Maybe it isn't good idea to replace patched files while server running, I need more read about how plugins auto update it self.

[PerchunPak]

Full log https://pastebin.com/TBtBNuhP Interesting that error NoClassDefFoundError raises every time with different class

[PerchunPak]

Okay, I read. As I understand, auto update works because plugin didn't initialize fully. But backdoor trying replace plugins which already fully initialized. All what you can do as I understand, it is add "Yes|No inject in other plugins" menu when injecting plugin, and then try to find system that will replace plugins jars after their stop or like this.

[MajesticWaffle]

Merged and released as Version 2.1

[PerchunPak]

Doesn't fix issue with fail spreading thought server plugins, I only added switch to change this option.

[MajesticWaffle]

I'll leave this open for any other problems related to infection.

I also changed the option to warn that the feature is experimental.

[MajesticWaffle]

I'm guessing your specific problem is that on windows, different parts of the java assist library are needed.

Could you run java -Xlog:class+load=info:classloaded.txt -jar Backdoor-2.1.jar And inject a plugin (with infection enabled) and upload classloaded.txt (contains all classes loaded by the jvm)?

[PerchunPak]

Sorry for long time without answer

Unrecognized option: -Xlog:class+load=info:classloaded.txt
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

[PerchunPak]

Oops, I was on Java 8. https://pastebin.com/dtLTfFsp

[nullsoepic]

With spreading enabled upon starting the server it fails to spread, and the plugin that was infected with the Injector does not work. This is the part of the plugins loading. https://pastebin.com/raw/U6kgDuLt The only plugins on the server are LuckPerms and ProtocolLib(infected). Both plugins work as if they were just downloaded, but neither seem to be infected

[MajesticWaffle]

@nullsoepic This is a certified "Im-a-dipshit" moment. will be fixed soon.

[MajesticWaffle]

@nullsoepic Should be fixed in v2.2.3

[erxson]

spreading doesn't work on windows? Temp folder created and these weird tmp files, but any jar doesn't contain any of backdoor files. When I open these temp files with 7zip I see backdoor package Log (I backdoored ProtocolLib) [19:29:56 INFO]: [ProtocolLib] [STDOUT] [Injector] Writing patched main class. [19:29:56 INFO]: [ProtocolLib] [STDOUT] [Injector] Finished writing file: TitleManager-2.3.6.jar [19:29:57 INFO]: [ProtocolLib] [STDOUT] Unknown IO error while copying new main class. [Ljava.lang.StackTraceElement;@5214e008 [19:29:57 INFO]: ## Backdoor ## Plugin 'ProtocolLib' has a Debugger installed.

[erxson]

Full log (Latest release of backdoor, 1.19 Paper) https://paste.gg/p/anonymous/c00aef05ad254677ae1a9aacc97f8eb3/files/cae075bc83c94aab93bdbe2da07393c3/raw

[PerchunPak]

spreading doesn't work on windows?

Actually, spreading just doesn't work.

[erxson]

Is it hard to unload plugin, before infecting?