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[原创]游戏安全之Unity3DGameObjectManage
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发表于: 2023-4-19 14:47
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简介：
在Unity3D游戏中，最基本的就是寻找Unity3D中的GameObjectManage。
如何寻找GameObjectManage:
在Unity游戏中通常存在UnityPlayer.dll文件，我们在运行游戏后在运行Unity PDB Downloader.exe来获取游戏符号文件
在获取到文件后导入刀ida pro中直接搜索GetGameObject就能找到函数了：
找到该函数后，通过x64dbg跳转过去拿到基础地址：
GOM数据结构：
通过ida pro能查看到GOM的数据结构为：
1 2 3 4 5 6 | GameObjectManager{List<ListNode<GameObject>> m_TaggedNodes;List<ListNode<GameObject>> m_ActiveNodes;} |
内存中如下所示：
很明显的双链表结构，其中每个元素都是GameObject：
1 2 3 4 5 6 7 | class BaseObject{public:BaseObject* m_lastObject; //0x0000BaseObject* m_nextObjects; //0x0008GameObject* m_objectEntity; //0x0010}; |
从0x10的位置才是该对象的Entry，GameObject在ida中如下所示：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | 00000000 GameObject struc ; (sizeof=0x88, align=0x8, copyof_11640)00000000 ; XREF: ?BuildGenericAvatar@AvatarBuilderBindings@@YA?AVScriptingObjectPtr@@PEAVGameObject@@AEBV?$basic_string@DV?$StringStorageDefault@D@core@@@core@@@Z/r00000000 baseclass_0 EditorExtension ? ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+87/w00000000 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+8C/w ...00000030 m_Component dynamic_array<GameObject::ComponentPair,0> ?00000030 ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+A3/w00000030 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+AB/w ...00000050 m_CullSceneMask dq ? ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &):HumanDescription__Reset_0/o00000050 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+B6/w ...00000058 m_Layer dd ? ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+BE/w00000058 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+128/r ...0000005C m_Tag dw ?0000005E m_IsActive db ?0000005F m_IsActiveCached db ?00000060 m_ActivationState dd ? ; enum GameObject::ActivationState00000064 m_SupportedMessages dd ?00000068 m_Name ConstantString ? ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+BA/w00000068 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+13A/w00000070 m_ActiveGONode ListNode<GameObject> ? ; XREF: AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &):core__basic_string_char_core__StringStorageDefault_char______ctor__1380/w00000070 ; AvatarBuilderBindings::BuildGenericAvatar(GameObject *,core::basic_string<char,core::StringStorageDefault<char>> const &)+F5/w ...00000088 GameObject ends |
+0x68为对象的名称：
遍历：
通过上面的知识，我们很容易就能遍历出unity中所有的对象
代码：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #include <windows.h>#include <iostream>using namespace std;HANDLE pHandle = 0;bool ReadMemory(PVOID address, PVOID buffer, size_t size){ SIZE_T ret_size; return ReadProcessMemory(pHandle, address, buffer, size, &ret_size);}ULONG64 ReadMemoryULong64(PVOID address){ ULONG64 returnUlong = 0; SIZE_T ret_size; ReadProcessMemory(pHandle, address, &returnUlong, sizeof(ULONG64), &ret_size); return returnUlong;}void main() { pHandle = OpenProcess(PROCESS_ALL_ACCESS,FALSE,0x244c); ULONG64 GameObjectManageBase = 0x7FF89C2D44E8; ULONG64 GameObjectManageValue = ReadMemoryULong64((PVOID)GameObjectManageBase); ULONG64 NextObject,GameEntry,NameAddress = 0; NextObject = ReadMemoryULong64((PVOID)(GameObjectManageValue + 0x8)); char* NameBuffer = (char*)malloc(40); memset(NameBuffer,0,40); while (true) { if (NextObject == GameObjectManageValue) { break; } GameEntry = ReadMemoryULong64((PVOID)(NextObject + 0x10)); NameAddress = ReadMemoryULong64((PVOID)(GameEntry + 0x68)); ReadMemory((PVOID)NameAddress, NameBuffer, 40); cout << "[+] Address: " << hex << GameEntry << " Name: " << NameBuffer << endl; memset(NameBuffer, 0, 40); NextObject = ReadMemoryULong64((PVOID)(NextObject + 0x8)); }} |
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