What is alg.exe? Should I remove it?

by Jake Doevan - -
alg.exe

Alg.exe is a legitimate file, although it can be potentially replaced by malware

Alg.exe is an executable Microsoft Windows file that stands for Application Layer Gateway Service. It is a legitimate process that that provides the ability for Windows Firewall and third-party plugins to connect to the internet network properly. It usually runs in the task manager and can be killed, although it is not recommended if the file is legitimate. Alg.exe is located in C:\Windows\System32 folder and typically sizes at 45,000 bytes.

SUMMARY
Name Alg.exe
Type System file
Main dangers malware can disguise itself as legitimate file
Symptoms Multiple instances of the file running in the Task manager; is NOT located in C:\Windows\System32 folder
Distribution Spam emails, system vulnerabilities, malicious websites, etc.
Elimination ONLY required if the file is malware – use Reimage for that

If you end task via the task manager, specific programs may misbehave or malfunction entirely. The alg.exe executable allows applications (such as IM clients, RTSP, BitTorrent, SIP, and FTP) from a client computer to dynamically utilize passive TCP/ UDP ports in communicating with known ports on a server. This file lets access certain applications to access the network through the firewall.

Nevertheless, because the file is executable, it can be replaced, duplicated or created by malware. Malicious software is a dangerous threat to one's privacy and cybersecurity and should not be taken lightly. If Alg.exe is not causing you any trouble while it is running, you should ignore it and let it do its job.

If you delete alg.exe you will block communication ports, or, for advanced users, you will open numerous ports on the firewall and create vulnerability for the system. The computer will be prone to threats.

Alg.exe is associated with Application Level (or Layer) Gateway Service and NAT (Network Address Translation), and it is needed to supplement the firewall protection of a network.

However, if the file has multiple instances running in the task manager and is NOT located in C:\Windows\System32, your PC might be in trouble. Additionally, look for the following symptoms:

  • Increased Central processing unit and/or Graphics processing unit usage, even when no applications are running;
  • Increased operation of the fan – the device is trying to cope with intense usage of hardware;
  • Computer crashes or freezes during its operation or during the idle process;
  • Frequent BSoDs;
  • Increased amount of adverts injected into browsers.

Despite all this, some trojans worms or keyloggers produce no symptoms at all. That is yet another reason to employ reputable security software to and perform frequent scans.

Distribution methods of malicious files

There is no doubt that malicious software should not be let into your system. It can corrupt your files, break software, abuse your system's resources or even steal your sensitive information, such as credit card details or usernames and passwords. Thus, security experts warn that it is vital to pay attention while browsing the web and installing new applications from unknown sources.

Malware is usually distribution via malicious attachments in spam emails. Phishing emails are sent by a botnet, which can be rented out by cybercriminals to attack targeted or random people. Email providers typically have a built-in scanner that can recognize phishing emails and flag them before the user opens it. Unfortunately, there are plenty of emails that manage to surpass this level of protection. Thus, you should be extremely careful when opening emails from unknown sources.

Another successful malware distribution technique is by using software vulnerabilities. Malware can look for weak links in software and enter the compromised machines. Software developers are well aware that these issues may occur and, as soon as the vulnerability is discovered, it is patched, preventing hackers to abuse it in the future. Therefore, we recommend updating your operating system, anti-malware program, as well software as soon as updates are out.

Remove Alg.exe if the file is malicious

Trojan horses and similar malicious software is quite complicated and not easy to detect, as malware is now more sophisticated and can avoid detection. If you suspect that the file might be malignant, you should not wait and immediately perform a full Alg.exe virus removal. We recommend using Reimage pr Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus for this task – this security software can defeat even the most stubborn malware.

Nevertheless, some viruses are capable of detecting anti-virus software and preventing it from starting normally. Therefore, we suggest you enter Safe Mode with Networking and initiate the scan from there.

verdict - status of the file:
diagnosis required
Advice: If your computer seems sluggish, or you are suffering from unwanted advertisements and redirects to unknown websites, we highly recommend you to scan it with reputable anti-spyware program. Do some FREE scan tests and check the system for unwanted applications that might be responsible for these problems.
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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is a recommended tool to scan your system for possible threats and crappy software. The trial version of the product will find harmful applications in your system.
More information about this program can be found in Reimage review.
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About the author

Jake Doevan
Jake Doevan - Computer technology expert

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