How to Remove a Rootkit in System32?

Rootkit in system32 refers to the existence of malicious software. This malware can take advantage of various driver functions to gain access to your PC. It uses the authorization code hardcoded into the driver to register itself and use all the functions it offers. Once it is registered, malware can use the whole driver’s functionality and exploit your PC. Read on to find out how to remove a rootkit in system32.

How to Remove a Rootkit in System32?

To Remove a Rootkit in System32 you can refer to our anti-rootkit tools page.

Listed below are a few of these threats:

DirtyMoe service

The DirtyMoe service is a common rootkit that deploys itself on a victim’s computer. It uses a variety of infected files to deploy itself on a victim’s system. For example, it can be hidden in a system volume or installed silently by using a legitimate-looking application. The malware is typically installed without user interaction and silently. It can be installed through a self-extracting archive or by repacked installers of popular programs.

The DirtyMoe code is crafted to hide its malicious activities. Although it uses the Windows Event Log system to record information about started services, it’s possible to detect it through a DLL file. Using WinDbg, you can view all loaded modules and discover malicious drivers with the prefix dump_. These methods are described below. This malware will also attempt to obfuscate itself by registering itself in a filter manager.

DirtyMoe driver

DirtyMoe malware has been identified as a system32 component, with a rootkit code signature similar to the rogue XP antivirus program. The malicious code hides its activities in the kernel, by executing user-mode commands with kernel privileges and injecting arbitrary DLL files into targeted processes. Moreover, the malware censors the file system content to hide its presence.

The DirtyMoe driver performs a wide range of malicious activities, primarily through the manipulation of the operating system’s memory dump. This malware takes advantage of a Windows naming convention for virtual drivers, which prefix a DLL with a dump_ string. By modifying the name of the file, the malware attempts to hide its malicious activities. Moreover, the DirtyMoe driver also dumps the filesystem content and imports an arbitrary DLL, which is then loaded by the malicious driver in the kernel.

MalGetCellRoutine()

To run a rootkit on Windows, malware needs to find the GetCellRoutine() method on the operating system’s kernel and replace it with MalGetCellRoutine(). This malicious code utilizes a well documented implementation of the GetCellRoutine() method in the kernel. It does this by looking for a structure known as CM_KEY_CONTROL_BLOCK. The HHIVE structure holds a pointer to the GetCellRoutine() method. This structure has different offsets for every version of Windows, so the driver must determine the version of the operating system it’s running on before attempting to call the original kernel GetCellRoutine() method. Once it finds the key, it calls the original kernel GetCellRoutine() method and checks the

To prevent this from happening, the malware must be detected in user mode. The process is executed in its own memory space. In order to hide its presence, it modifies its size in the registry, causing its value to change during the process’s scanning. This process also hides itself from process management tools that rely on the kernel’s list of active processes. By removing it from the kernel’s list of active processes, the malware will not be detected in such tools.

MalNtfsCreatCallback()

The DirtyMoe driver is a rootkit that is capable of modifying the NTFS filesystem. The DirtyMoe driver will enroll a malicious routine to the filter manager, influence the filesystem I/O results, and register arbitrary DLLs into a new thread. Once it has gotten into the system, it will start abusing the APC kernel mechanism to load the malicious code.

If you’re worried that you may have a rootkit, you can try running a rootkit scanner. This will reveal the presence of rootkits in the system. The scanner will detect rootkits at both the kernel and user modes. Once it has detected the rootkit, it will also find mismatches between the Windows API and raw hive data.

Minifilter driver

The Minifilter driver is a kernel device driver used by malicious software to conceal files from security software. The driver registers itself in the Driver Entry routine and specifies two processes, data to be injected into processes, and callback methods. The minifilter driver then intercepts and processes requests to view malicious files and returns them to the malware operator. In other words, it hides files and gives its operator control over updating.

The minifilter driver has the capability of loading and unloading itself. It can also list all instances associated with a filter or volume. If the driver is not registered, it will most likely fail certification. The driver must be properly registered with Microsoft to be able to execute the FLTMC command. Otherwise, it will likely receive an ire from Microsoft and fail the certification process. Fortunately, there are many other resources available to analyze the Windows kernel driver.

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