mirror of
https://github.com/Ne0nd0g/merlin
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Ne0nd0g
104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
/*
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Merlin is a post-exploitation command and control framework.
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This file is part of Merlin.
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Copyright (C) 2019 Russel Van Tuyl
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Merlin is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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any later version.
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Merlin is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Merlin. If not, see <http://www.gnu.org/licenses/>.
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*/
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package shellcode
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import (
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// Standard
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"encoding/base64"
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"encoding/hex"
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"errors"
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"io/ioutil"
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"strings"
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)
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// GetJob returns a string array containing the commands, in the proper order, to be used with agents.AddJob
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func GetJob(method string, shellcode string, pid string) ([]string, error) {
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// TODO shellcode input needs to be Base64 encoded
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switch strings.ToLower(method) {
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case "self":
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return []string{"shellcode", "self", shellcode}, nil
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case "remote":
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return []string{"shellcode", "remote", pid, shellcode}, nil
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case "rtlcreateuserthread":
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return []string{"shellcode", "rtlcreateuserthread", pid, shellcode}, nil
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case "userapc":
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return []string{"shellcode", "userapc", pid, shellcode}, nil
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}
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return nil, errors.New("a valid shellcode method was not provided")
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}
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// parseHex evaluates a string array to determine its format and returns a byte array of the hex
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func parseHex(str []string) ([]byte, error) {
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hexString := strings.Join(str, "")
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data, err := base64.StdEncoding.DecodeString(hexString)
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if err != nil {
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return nil, err
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}
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s := string(data)
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hexString = s
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// see if string is prefixed with 0x
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if hexString[0:2] == "0x" {
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hexString = strings.Replace(hexString, "0x", "", -1)
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if strings.Contains(hexString, ",") {
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hexString = strings.Replace(hexString, ",", "", -1)
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}
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if strings.Contains(hexString, " ") {
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hexString = strings.Replace(hexString, " ", "", -1)
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}
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}
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// see if string is prefixed with \x
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if hexString[0:2] == "\\x" {
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hexString = strings.Replace(hexString, "\\x", "", -1)
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if strings.Contains(hexString, ",") {
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hexString = strings.Replace(hexString, ",", "", -1)
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}
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if strings.Contains(hexString, " ") {
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hexString = strings.Replace(hexString, " ", "", -1)
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}
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}
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h, errH := hex.DecodeString(hexString)
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return h, errH
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}
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// parseShellcodeFile parses a path, evaluates the file's contents, and returns a byte array of shellcode
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func parseShellcodeFile(filePath string) ([]byte, error) {
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b, errB := ioutil.ReadFile(filePath) // #nosec G304 Users can include any file from anywhere
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if errB != nil {
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return nil, errB
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}
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h, errH := parseHex([]string{string(b)})
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if errH != nil {
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return h, nil
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}
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return b, nil
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}
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