我试图创建一个简单的Telnet服务器,记录那些机器人使用的用户名/密码对,试图暴力破解弱Telnet凭证(Mirai,Gafgyt等)。我试图将Twisted用于此目的,因为它似乎是用于此类目的的最先进技术。
这是我到目前为止所做的:
#!/usr/bin/env python
from twisted.conch.telnet import TelnetTransport, TelnetProtocol, ECHO
from twisted.internet.protocol import ServerFactory
from twisted.application.internet import TCPServer
from twisted.application.service import Application
from twisted.internet import reactor
import logging
class TelnetEcho(TelnetProtocol):
ip = ''
user = ''
state = ''
line = ''
def connectionMade(self):
self.ip = self.transport.getPeer().host
self.transport.write('Username: ')
self.transport.will(ECHO)
self.state = 'User'
def dataReceived(self, data):
if self.state != 'Password':
self.transport.write(data)
self.line += data
if data == '\n':
self.processLine()
self.line = ''
return
def processLine(self):
if self.state == 'User':
self.user = self.line.strip()
self.transport.write('Password: ')
self.state = 'Password'
elif self.state == 'Password':
print 'IP: ' + self.ip + ', user:' + self.user + ', pass:' + self.line.strip()
logging.info(self.ip + ',' + self.user + ',' + self.line.strip())
self.transport.write('\r\nIncorrect password or username.\r\n')
self.transport.write('Username: ')
self.state = 'User'
def CreateMyFactory():
factory = ServerFactory()
factory.protocol = lambda: TelnetTransport(TelnetEcho)
return factory
if __name__ == "__main__":
logging.basicConfig(filename='telnet.log', format='%(message)s', level=logging.DEBUG)
logging.info('Tmestamp,IP,Username,Password')
for handler in logging.root.handlers[:]:
logging.root.removeHandler(handler)
logging.basicConfig(filename='telnet.log', format='%(asctime)s,%(message)s', datefmt='%Y-%m-%d %H:%M:%S', level=logging.DEBUG)
MyFactory = CreateMyFactory()
reactor.listenTCP(23, MyFactory)
reactor.run()
它工作得很好 - 我的意思是,机器人尝试登录并记录他们使用的凭据 - 但我不断收到Unhandled error in Deferred
错误让我完全神秘化。我没有使用任何延期,至少不是故意的。是什么导致错误以及如何解决问题?
有趣的是,如果我手动telnet到服务器并尝试自己输入用户名/密码,则不会出现错误;它们只在机器人试图登录时出现。我猜机器人正试图做一些我的服务器不能解决的事情,但我无法弄清楚我应该做什么。
我已将上述脚本更改为使用Twisted记录器而不是Python记录器。现在我在日志中获得了一些额外的信息。首先,我收到以下警告:
2017-09-06 16:17:01+0300 [-] Warning: primary log target selected twice at <c:\python\lib\site-packages\twisted\application\app.py:212> - previously selected at <c:\python\lib\site-packages\twisted\python\log.py:214>. Remove one of the calls to beginLoggingTo.
我想这是Twisted中的一些错误。
接下来,当&#34; Deferred中的未处理错误&#34;发生错误,我得到这个日志:
2017-09-06 16:33:33+0300 [-] Unhandled error in Deferred:
2017-09-06 16:33:33+0300 [-] Unhandled Error
Traceback (most recent call last):
Failure: twisted.conch.telnet.OptionRefused: twisted.conch.telnet.OptionRefused:'\x01'
任何想法如何解决?
答案 0 :(得分:0)
以下是您对Deferred
:
self.transport.will(ECHO)
以下是will
的API文档:
def will(option):
"""
Indicate our willingness to begin performing this option locally.
Returns a Deferred that fires with True when the peer agrees to allow us
to begin performing this option, or fails with L{OptionRefused} if the
peer refuses to allow us to begin performing it. If the option is
already enabled locally, the Deferred will fail with L{AlreadyEnabled}.
If negotiation regarding this option is already in progress, the
Deferred will fail with L{AlreadyNegotiating}.
Note: It is currently possible that this Deferred will never fire,
if the peer never responds, or if the peer believes the option to
already be enabled.
"""
在您的情况下,对等方拒绝您提供执行ECHO功能。如果要取消拒绝报告,请添加errback以吞下该异常类型:
d = self.transport.will(ECHO)
d.addErrback(lambda reason: reason.trap(OptionRefused))
另请注意,您在应用程序中实际上没有任何回显逻辑,因此如果您打算提供回声,则可能需要添加它。您可能希望围绕Password
提示而不是Username
提示进行意愿/不进行ECHO协商。意志/不进行ECHO协商的要点通常是抑制密码的回声。