Process Injection: Внедрение DLL-библиотек
Other sub-techniques of Process Injection (12)
Adversaries may inject dynamic-link libraries (DLLs) into processes in order to evade process-based defenses as well as possibly elevate privileges. DLL injection is a method of executing arbitrary code in the address space of a separate live process.
DLL injection is commonly performed by writing the path to a DLL in the virtual address space of the target process before loading the DLL by invoking a new thread. The write can be performed with native Windows API calls such as VirtualAllocEx and WriteProcessMemory, then invoked with CreateRemoteThread (which calls the LoadLibrary API responsible for loading the DLL). (Citation: Elastic Process Injection July 2017)
Variations of this method such as reflective DLL injection (writing a self-mapping DLL into a process) and memory module (map DLL when writing into process) overcome the address relocation issue as well as the additional APIs to invoke execution (since these methods load and execute the files in memory by manually preforming the function of LoadLibrary).(Citation: Elastic HuntingNMemory June 2017)(Citation: Elastic Process Injection July 2017)
Another variation of this method, often referred to as Module Stomping/Overloading or DLL Hollowing, may be leveraged to conceal injected code within a process. This method involves loading a legitimate DLL into a remote process then manually overwriting the module's AddressOfEntryPoint before starting a new thread in the target process.(Citation: Module Stomping for Shellcode Injection) This variation allows attackers to hide malicious injected code by potentially backing its execution with a legitimate DLL file on disk.(Citation: Hiding Malicious Code with Module Stomping)
Running code in the context of another process may allow access to the process's memory, system/network resources, and possibly elevated privileges. Execution via DLL injection may also evade detection from security products since the execution is masked under a legitimate process.
Примеры процедур |
|
| Название | Описание |
|---|---|
| Heyoka Backdoor |
Heyoka Backdoor can inject a DLL into rundll32.exe for execution.(Citation: SentinelOne Aoqin Dragon June 2022) |
| Saint Bot |
Saint Bot has injected its DLL component into `EhStorAurhn.exe`.(Citation: Malwarebytes Saint Bot April 2021) |
| Emissary |
Emissary injects its DLL file into a newly spawned Internet Explorer process.(Citation: Lotus Blossom Dec 2015) |
| Remsec |
Remsec can perform DLL injection.(Citation: Kaspersky ProjectSauron Technical Analysis) |
| DarkTortilla |
DarkTortilla can use a .NET-based DLL named `RunPe6` for process injection.(Citation: Secureworks DarkTortilla Aug 2022) |
| BlackEnergy |
BlackEnergy injects its DLL component into svchost.exe.(Citation: F-Secure BlackEnergy 2014) |
| Turla |
Turla has used Metasploit to perform reflective DLL injection in order to escalate privileges.(Citation: ESET Turla Mosquito May 2018)(Citation: Github Rapid7 Meterpreter Elevate) |
| PS1 |
PS1 can inject its payload DLL Into memory.(Citation: BlackBerry CostaRicto November 2020) |
| Koadic |
Koadic can perform process injection by using a reflective DLL.(Citation: Github Koadic) |
| RARSTONE |
After decrypting itself in memory, RARSTONE downloads a DLL file from its C2 server and loads it in the memory space of a hidden Internet Explorer process. This “downloaded” file is actually not dropped onto the system.(Citation: Camba RARSTONE) |
| Cobalt Strike |
Cobalt Strike has the ability to load DLLs via reflective injection.(Citation: Talos Cobalt Strike September 2020)(Citation: Cobalt Strike Manual 4.3 November 2020) |
| SDBbot |
SDBbot has the ability to inject a downloaded DLL into a newly created rundll32.exe process.(Citation: Proofpoint TA505 October 2019) |
| Metamorfo |
Metamorfo has injected a malicious DLL into the Windows Media Player process (wmplayer.exe).(Citation: Medium Metamorfo Apr 2020) |
| ComRAT |
ComRAT has injected its orchestrator DLL into explorer.exe. ComRAT has also injected its communications module into the victim's default browser to make C2 connections appear less suspicious as all network connections will be initiated by the browser process.(Citation: ESET ComRAT May 2020)(Citation: CISA ComRAT Oct 2020) |
| Socksbot |
Socksbot creates a suspended svchost process and injects its DLL into it.(Citation: TrendMicro Patchwork Dec 2017) |
| Bumblebee |
The Bumblebee loader can support the `Dij` command which gives it the ability to inject DLLs into the memory of other processes.(Citation: Proofpoint Bumblebee April 2022)(Citation: Symantec Bumblebee June 2022) |
| Lizar |
Lizar has used the PowerKatz plugin that can be loaded into the address space of a PowerShell process through reflective DLL loading.(Citation: BiZone Lizar May 2021) |
| Malteiro |
Malteiro has injected Mispadu’s DLL into a process.(Citation: SCILabs Malteiro 2021) |
| FunnyDream |
The FunnyDream FilepakMonitor component can inject into the Bka.exe process using the `VirtualAllocEx`, `WriteProcessMemory` and `CreateRemoteThread` APIs to load the DLL component.(Citation: Bitdefender FunnyDream Campaign November 2020) |
| Maze |
Maze has injected the malware DLL into a target process.(Citation: McAfee Maze March 2020)(Citation: Sophos Maze VM September 2020) |
| Matryoshka |
Matryoshka uses reflective DLL injection to inject the malicious library and |