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greyhack/source/rootshell.src

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if params.len < 1 or params.len > 2 or params[0] == "-h" or params[0] == "--help" then
current_program = get_shell.host_computer.File(program_path)
exit "Usage: " + current_program.name + " <gateway ip> [host ip]\n\nWithout host ip, scan the gateway and choose a port.\nWith host ip, try router bounce exploits on gateway:0 against host ip."
end if
mx = include_lib("/lib/metaxploit.so")
if not mx then mx = include_lib(current_path + "/metaxploit.so")
if not mx then exit("Unable to load metaxploit.so")
crypto = include_lib("/lib/crypto.so")
if not crypto then crypto = include_lib(current_path + "/crypto.so")
local_shell = get_shell
local_cp = local_shell.host_computer
ip = params[0]
bounce_host = ""
if params.len == 2 then bounce_host = params[1]
bounce_mode = bounce_host != ""
login_ip = ip
if bounce_mode then login_ip = bounce_host
KNOWN_PASS = "Root1234"
rank_of = function(user)
if user == "root" then return 3
if user == "guest" then return 1
if user == "" then return 0
return 2
end function
is_requested_host = function(comp)
if not bounce_mode then return 1
if not comp then return 0
return comp.local_ip == bounce_host
end function
extract_value = function(line)
start = line.indexOf("<b>")
finish = line.indexOf("</b>")
if start != -1 and finish != -1 and finish > start then
return line[start + 3 : finish]
end if
before_dot = line.split("\.")[0]
words = before_dot.split(" ")
value = ""
for word in words
if word != "" then value = word
end for
return value
end function
object_user = function(comp)
if not comp then return "guest"
root_dir = comp.File("/root")
if root_dir and root_dir.has_permission("w") then return "root"
passwd = comp.File("/etc/passwd")
if passwd and passwd.has_permission("w") then return "root"
home = comp.File("/home")
if not home then return "guest"
folders = home.get_folders
if not folders then return "guest"
for folder in folders
if folder.name == "guest" then continue
if folder.has_permission("w") then return folder.name
end for
return "guest"
end function
has_item = function(list, value)
for item in list
if item == value then return 1
end for
return 0
end function
lib_name_of = function(name)
n = name.lower
if n.indexOf("ssh") != -1 then return "ssh"
if n.indexOf("ftp") != -1 then return "ftp"
return ""
end function
state = {
"best_shell": null,
"best_user": "guest",
"best_computer": null,
"passwd_file": null,
"passwd_processed": 0,
"password_changed": 0,
}
logs = []
last_clear = [0]
chosen_port = 0
redraw = function()
gap = 0.11
elapsed = time - last_clear[0]
if elapsed < gap then
delay = gap - elapsed
if delay < 0.01 then delay = 0.01
wait delay
end if
clear_screen
last_clear[0] = time
if bounce_mode then
print ip + " 0 -> " + bounce_host
else
print ip + " " + chosen_port
end if
for line in logs
print line
end for
end function
note = function(line)
logs.push(line)
redraw
end function
drop_root = function(sh)
if not sh then return
if object_user(sh.host_computer) != "root" then return
note("root shell")
sh.start_terminal
exit
end function
take_shell = function(sh)
if typeof(sh) != "shell" then return
if not is_requested_host(sh.host_computer) then return
user = object_user(sh.host_computer)
if state.best_shell == null or rank_of(user) > rank_of(state.best_user) then
state.best_shell = sh
state.best_user = user
note("shell user:" + user)
end if
drop_root(sh)
end function
take_computer = function(comp)
if typeof(comp) != "computer" then return
if not is_requested_host(comp) then return
user = object_user(comp)
if state.best_computer == null or rank_of(user) > rank_of(object_user(state.best_computer)) then
state.best_computer = comp
note("computer user:" + user)
end if
end function
take_file = function(f)
if typeof(f) != "file" then return
if f.is_folder then
files = f.get_files
if not files then return
for inner in files
if inner.name == "passwd" then take_file(inner)
end for
return
end if
if f.path != "/etc/passwd" then return
if not f.has_permission("r") then
note("/etc/passwd is not readable")
return
end if
state.passwd_file = f
note("file " + f.path)
crack_passwd_on(null)
end function
consider = function(of)
t = typeof(of)
if t == "shell" then
take_shell(of)
else if t == "computer" then
take_computer(of)
else if t == "file" then
take_file(of)
else if t == "number" then
if of == 1 then state.password_changed = 1
end if
end function
access_computer = function()
if state.best_shell then
comp = state.best_shell.host_computer
if comp then return comp
end if
return state.best_computer
end function
read_passwd_text = function(comp)
if state.passwd_file then
content = state.passwd_file.get_content
if content then return content
end if
if not comp then return ""
passwd = comp.File("/etc/passwd")
if not passwd then return ""
if not passwd.has_permission("r") then return ""
content = passwd.get_content
if not content then return ""
return content
end function
parse_passwd = function(content)
accounts = []
if not content then return accounts
for line in content.split(char(10))
if line == "" then continue
parts = line.split(":")
if parts.len < 2 then continue
user = parts[0]
hash = parts[1]
if user == "" or hash == "" then continue
accounts.push({"user": user, "hash": hash})
end for
ordered = []
for acc in accounts
if acc.user == "root" then ordered.push acc
end for
for acc in accounts
if acc.user == "root" then continue
if acc.user == "guest" then continue
ordered.push acc
end for
for acc in accounts
if acc.user == "guest" then ordered.push acc
end for
return ordered
end function
scan_rows = []
lan_ips = []
ssh_ports = []
push_lan = function(lan)
if lan == "" then return
if has_item(lan_ips, lan) then return
lan_ips.push lan
end function
push_ssh = function(port_num, libname)
kind = lib_name_of(libname)
if kind != "ssh" and port_num != 22 then return
if has_item(ssh_ports, port_num) then return
ssh_ports.push port_num
end function
add_scan_row = function(port_num, state_name, libname, version, lan)
scan_rows.push({
"port": port_num,
"state": state_name,
"lib": libname,
"version": version,
"lan": lan,
})
push_lan lan
push_ssh port_num, libname
end function
if bounce_mode then
chosen_port = 0
note("bouncing through " + ip + " to " + bounce_host)
else
print "scanning " + ip
router_sess = mx.net_use(ip)
if router_sess then
router_lib = router_sess.dump_lib
if router_lib then
add_scan_row 0, "open", router_lib.lib_name, router_lib.version, ""
end if
end if
router = get_router(ip)
if router then
used = router.used_ports
if used then
for p in used
if p.is_closed == 0 then st = "open" else st = "closed"
lan = p.get_lan_ip
sess = mx.net_use(ip, p.port_number)
if not sess then
add_scan_row p.port_number, st, "N/A", "N/A", lan
continue
end if
lib = sess.dump_lib
if not lib then
add_scan_row p.port_number, st, "N/A", "N/A", lan
continue
end if
add_scan_row p.port_number, st, lib.lib_name, lib.version, lan
end for
end if
end if
if scan_rows.len == 0 then exit("Unable to scan target")
table = "PORT STATE LIBRARY VERSION LAN"
for row in scan_rows
table = table + "\n" + row.port + " " + row.state + " " + row.lib + " " + row.version + " " + row.lan
end for
print format_columns(table)
port_in = user_input("port: ")
chosen_port = port_in.to_int
if typeof(chosen_port) != "number" then exit("Invalid port")
end if
if ssh_ports.len == 0 then ssh_ports.push 22
try_login = function(user, password)
if user == "" or password == "" then return null
if not bounce_mode then
sh = get_shell(user, password)
if typeof(sh) == "shell" then return sh
end if
for ssh_port in ssh_ports
sh = local_shell.connect_service(login_ip, ssh_port, user, password)
if typeof(sh) == "shell" then return sh
end for
return null
end function
login_accounts = function(accounts)
if not crypto then return
for acc in accounts
plain = crypto.decipher(acc.hash)
redraw
if not plain then continue
note(acc.user + ":" + plain)
sh = try_login(acc.user, plain)
take_shell sh
end for
end function
crack_passwd_on = function(comp)
if state.passwd_processed then return 1
content = read_passwd_text(comp)
if not content then return 0
note("reading /etc/passwd")
accounts = parse_passwd(content)
if accounts.len == 0 then return 0
state.passwd_processed = 1
login_accounts accounts
return 1
end function
steal_home_creds = function(comp)
if not comp then return
if not crypto then return
home = comp.File("/home")
if not home then return
if not home.has_permission("r") then return
folders = home.get_folders
if not folders then return
for folder in folders
names = ["Mail.txt", "Bank.txt"]
for fname in names
cfg = comp.File(folder.path + "/Config/" + fname)
if not cfg then continue
if not cfg.has_permission("r") then continue
text = cfg.get_content
if not text then continue
line = text.split(char(10))[0]
parts = line.split(":")
if parts.len < 2 then continue
hash = parts[1]
if hash == "" then continue
plain = crypto.decipher(hash)
redraw
if not plain then continue
note(folder.name + " " + fname + ":" + plain)
take_shell try_login(folder.name, plain)
take_shell try_login("root", plain)
end for
end for
end function
root_computer_accounts = function(comp)
if not comp then return
if object_user(comp) != "root" then return
changed = comp.change_password("root", KNOWN_PASS)
if changed == 1 then
state.password_changed = 1
note("changed root password")
take_shell try_login("root", KNOWN_PASS)
end if
created = comp.create_user("rsu", KNOWN_PASS)
if created == 1 then
note("created user rsu")
take_shell try_login("rsu", KNOWN_PASS)
end if
end function
writable_dir = function(comp, user)
paths = []
if user == "root" then paths.push "/root"
if user != "guest" and user != "root" then paths.push "/home/" + user
paths.push "/home/guest"
paths.push "/tmp"
paths.push "/var/tmp"
for p in paths
f = comp.File(p)
if not f then continue
if not f.is_folder then continue
if not f.has_permission("w") then continue
return p
end for
return null
end function
find_local = function(name, places)
for place in places
f = local_cp.File(place + "/" + name)
if f then return f
end for
return null
end function
remote_privesc = function(sh)
if typeof(sh) != "shell" then return 0
comp = sh.host_computer
if not comp then return 0
libdir = comp.File("/lib")
if not libdir then return 0
if not libdir.has_permission("r") then return 0
user = object_user(comp)
dest = writable_dir(comp, user)
if not dest then return 0
mx_file = find_local("metaxploit.so", ["/lib", current_path, home_dir, home_dir + "/guest"])
privesc_file = find_local("privesc", ["/bin", current_path, home_dir + "/guest"])
if not mx_file then return 0
if not privesc_file then return 0
note("uploading privesc to " + dest)
if libdir.has_permission("w") then
local_shell.scp(mx_file.path, "/lib", sh)
end if
copied_mx = local_shell.scp(mx_file.path, dest, sh)
copied_pr = local_shell.scp(privesc_file.path, dest, sh)
if typeof(copied_mx) == "string" then return 0
if typeof(copied_pr) == "string" then return 0
note("launching remote privesc")
sh.launch dest + "/privesc"
return 1
end function
overflow_target = function(port_num, extras)
if port_num == 0 then
sess = mx.net_use(ip)
else
sess = mx.net_use(ip, port_num)
end if
if not sess then
note("Unable to establish session")
return
end if
lib = sess.dump_lib
if not lib then
note("Unable to dump library")
return
end if
adds = mx.scan(lib)
redraw
if not adds then return
candidates = []
for add in adds
info = mx.scan_address(lib, add)
if not info then continue
lines = info.split(char(10))
for line in lines
pos = line.indexOf("Unsafe check:")
if pos == null then continue
if pos == -1 then continue
value = extract_value(line)
if value == "" then continue
candidates.push add + " " + value
end for
end for
for candidate in candidates
parts = candidate.split(" ")
add = parts[0]
value = parts[1]
for extra in extras
if port_num == 0 then
sess = mx.net_use(ip)
else
sess = mx.net_use(ip, port_num)
end if
if not sess then
redraw
continue
end if
lib = sess.dump_lib
if not lib then
redraw
continue
end if
if extra == "" then
of = lib.overflow(add, value)
else
of = lib.overflow(add, value, extra)
end if
consider of
redraw
end for
end for
end function
if bounce_mode then
extras = [bounce_host]
else
extras = [""]
if chosen_port == 0 then
for lan in lan_ips
if has_item(extras, lan) then continue
extras.push lan
end for
end if
end if
if not bounce_mode then
if not has_item(extras, KNOWN_PASS) then extras.push KNOWN_PASS
mail = user_mail_address
if mail then extras.push mail
end if
note("exploiting port " + chosen_port)
overflow_target chosen_port, extras
if state.password_changed then
note("trying " + KNOWN_PASS)
take_shell try_login("root", KNOWN_PASS)
end if
comp = access_computer
if crack_passwd_on(comp) == 0 then
note("no readable /etc/passwd")
end if
steal_home_creds comp
root_computer_accounts comp
if state.best_user == "root" then
drop_root state.best_shell
end if
if state.best_shell then
if state.best_user != "root" then
note("escalating from " + state.best_user)
remote_privesc state.best_shell
drop_root state.best_shell
end if
end if
if state.best_user == "root" and state.best_shell then
drop_root state.best_shell
end if
print "<color=#ff0000>You're so fucked even your momma's breaking out the bandaids.</color>"
print "This host is toast."
if state.best_shell then
print "dropping into " + state.best_user + " anyway"
state.best_shell.start_terminal
end if