Generating alerts when any file with a file size greater than 300mb is copied

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03/17/2020

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Update Time

11/20/2024

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File operation size Copy

https://wiki.itarian.com/frontend/web/topic/how-to-use-custom-script-procedure-monitoring

Tested in Windows 10.

Procedure's Instructions

#To define a particular parameter, replace the 'parameterName' inside itsm.getParameter('parameterName') with that parameter's name
drive = itsm.getParameter('Drive') #Provide the drive which you need to find files  eg: "c:"

import os 
import sys
import ctypes

def alert(arg):
    sys.stderr.write("%d%d%d" % (arg, arg, arg))

ps_content=r'''
$time = (Get-Date).AddMinutes(-30)
$size = 300MB
Get-ChildItem %s\ -Recurse | Where-Object {$_.CreationTime -gt $time -and $_.Length -gt $size}
'''%(drive)

import os

def ecmd(command):
    import ctypes
    from subprocess import PIPE, Popen
    
    class disable_file_system_redirection:
        _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
        _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
        def __enter__(self):
            self.old_value = ctypes.c_long()
            self.success = self._disable(ctypes.byref(self.old_value))
        def __exit__(self, type, value, traceback):
            if self.success:
                self._revert(self.old_value)
    
    with disable_file_system_redirection():
        obj = Popen(command, shell = True, stdout = PIPE, stderr = PIPE)
    out, err = obj.communicate()
    ret=obj.returncode
    if ret==0:
        if out:
            alert(1)
            return out.strip()
        else:
            alert(0)
            return ret
    else:
        if err:
            return err.strip()
        else:
            return ret

file_name='powershell_file.ps1'
file_path=os.path.join(os.environ['TEMP'], file_name)
print file_path
with open(file_path, 'wb') as wr:
    wr.write(ps_content)

ecmd('powershell "Set-ExecutionPolicy RemoteSigned"')
print ecmd('powershell "%s"'%file_path)

os.remove(file_path)

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