How to remove Squidoor Backdoor

What is Squidoor Backdoor

Squidoor Backdoor is a sophisticated piece of malware classified as a Trojan, specifically designed to target Windows and Linux operating systems. Known for its stealth capabilities, this backdoor-type malware infiltrates systems by exploiting vulnerabilities, particularly in IIS servers, and establishes persistent access through web shells. Its primary function is to create a “backdoor” for attackers, allowing them to gain unauthorized access to compromised machines, move laterally within networks, and execute arbitrary commands. Squidoor is highly modular, enabling it to perform a variety of malicious activities, including data exfiltration, process injection, and downloading additional malware. This malware has been notably used in cyber-espionage campaigns, targeting sensitive sectors like governmental and defense entities, mainly in Southeast Asia and South America. With advanced anti-detection and anti-analysis features, it can evade security measures by detecting virtual machine environments and utilizing multiple C&C communication methods. The presence of Squidoor Backdoor on any device poses significant risks, including severe privacy breaches, financial losses, and the potential for identity theft, emphasizing the importance of robust cybersecurity measures to prevent its infiltration.

How Squidoor Backdoor infected your system

Squidoor Backdoor is a sophisticated piece of malware that infiltrates computers primarily through exploiting vulnerabilities in Internet Information Services (IIS) servers. This backdoor-type Trojan is often deployed in targeted cyber-espionage campaigns, especially against high-sensitivity sectors such as government and defense. Once Squidoor gains initial access, it deploys web shells to maintain persistent backdoor access, allowing attackers to control the compromised systems remotely. The malware is known for its stealth, employing anti-detection techniques to evade security measures, such as recognizing virtual machines and sandbox environments. Squidoor is typically distributed via phishing emails containing malicious attachments or links, drive-by downloads, and through the use of pirated software. Its ability to self-proliferate across networks further enhances its threat, as it can spread to other devices connected to the infected network, leading to widespread compromise and data exfiltration.

1. Download Squidoor Backdoor Removal Tool
2. Use Windows Malicious Software Removal Tool to remove Squidoor Backdoor
3. Use Autoruns to remove Squidoor Backdoor
4. Files, folders and registry keys of Squidoor Backdoor
5. Other aliases of Squidoor Backdoor
6. How to protect from threats, like Squidoor Backdoor

Remove Squidoor Backdoor manually

Manual removal of Squidoor Backdoor by inexperienced users may become a difficult task because it does not create entries in Add/Remove Programs under Control Panel, does not install browser extensions, and uses random file names. However, there are pre-installed instruments in the Windows system, that allow you to detect and remove malware without using third-party applications. One of them is Windows Malicious Software Removal Tool. It comes with Windows Update in Windows 11, 10, 8. 8.1. For older operating system you can download it here: 64-bit version | 32-bit version.

Remove Squidoor Backdoor using Windows Malicious Software Removal Tool

1. Type mrt in the search box near Start Menu.
2. Run mrt clicking on found item.
3. Click Next button.
4. Choose one of the scan modes Quick scan, Full scan, Customize scan (Full scan recommended).
5. Click Next button.
6. Click on View detailed results of the scan link to view the scan details.
7. Click Finish button.

Remove Squidoor Backdoor using Autoruns

Squidoor Backdoor often sets up to run at Windows startup as an Autorun entry or Scheduled task.

1. Download Autoruns using this link.
2. Extract the archive and run Autoruns.exe file.
3. In Options menu make sure there are checkboxes near Hide Empty Locations, Hide Microsoft Entries, and Hide Windows Entries.
4. Search for suspicious entries with weird names or running from locations like: C:\{username}\AppData\Roaming.
5. Right-click on suspicious entry and choose Delete. This will prevent the threat to run at startup.
6. Switch to Scheduled Tasks tab and do the same.
7. To remove files themselves, click on suspicious entries and choose Jump to Entry…. Remove files or registry keys found.

Remove files, folder and registry keys of Squidoor Backdoor

Squidoor Backdoor files and folders


{randomname}.exe


Squidoor Backdoor registry keys


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Aliases of Squidoor Backdoor

How to protect from threats, like Squidoor Backdoor, in future

Standard Windows protection or any decent third-party antivirus (Norton, Avast, Kaspersky) should be able to detect and remove Squidoor Backdoor. However, if you got infected with Squidoor Backdoor with existing and updated security software, you may consider changing it. To feel safe and protect your PC from Squidoor Backdoor on all levels (browser, e-mail attachments, Word or Excel scripts, file system) we recommend a leading provider of internet security solutions – BitDefender. Its solutions both for home and business users proved to be one of the most advanced and effective. Choose and get your BitDefender protection via the button below:

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