1sass.exe Crypto Miner Virus - How to Remove It from Your PC

1sass.exe Crypto Miner Virus – How to Remove It from Your PC

This post has been created to explain what is the 1sass.exe cryptocurrency miner and how to detect and remove it from your computer system effectively.

1sass.exe is the fake name of the legitimate lsass.exe process, responsible for Local Security authentication in Windows. In reality, the process is associated with CryptoCurrency miner malware which aims to take a significant percentage of your CPU or GPU resources in order to mine for anonymous cryptocurrencies from the likes of Monero and BitCoin. Since there are no symptoms besides the 1sass.exe process running in the background of your computer system, it is recommended to read this article in order to learn how to detect and remove this cryptocurrency miner from your PC.

Threat Summary

Name1sass.exe Miner Virus
TypeCryptoCurrency Miner
Short DescriptionAims to infect your computer and use it’s CPU, GPU and other resources to turn it into a miner for cryptocurrencies.
SymptomsHightened CPU and GPU usage and overheating. The victim PC may break if this virus mines for longer periods of time.
Distribution MethodSpam Emails, Email Attachments, Executable files
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1sass.exe –

The malware may slither onto your computer via a variety of methods, the primary of which may be via malicious web links or files. Often the malware authors and operators use e-mail to propagate the malicious files. One of the latest trends in e-mail messages that is used may also be used with the 1sass.exe miner to infect unsuspecting users – fake buttons of social media sites. Such e-mails are very sophisticated and may link third-party websites via seemingly legitimate documents. They become more and more difficult to be recognized, like the example of a malicious e-mail linking to the file via dropbox below:

Besides this, other legitimate names, like PayPal, LinkedIn, Facebook, UPS, FedEx may also be used to propagate malware, so it is advisable to be careful and secure your Windows OS, so that even you make a mistake, your PC remains protected. For starters, you should disable the following services to prevent exploits from slithering malware in it.

  • Disable the WMI service.
  • Disable SMB and Download the latest security patches from Microsoft.

1sass.exe Miner Malware – Malicious Activity

As soon as your computer becomes infected by this cryptocurrency miner virus, you may immediately experience it’s symptoms. This is because the malicious payload of this cryptocurrency miner, consisting of 1sass.exe and other malicious processes may be dropped on your computer system in the following Windows directories and automatically executed immediately after:

  • %AppData%
  • %Temp%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Windows%
  • %System%
  • %system32%

After the payload is active, it may trigger different modules, each of which is responsible for different activities, such as setting malicious registry entries in the following Windows Registry sub-keys:

→ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

After this has occurred, the virus may also modify your services to run it’s processes as an administrator and all of this may happen without you even noticing this. In addition to this, since the 1sass.exe may also be a Trojan horse, the malware may perform other malicious activities on your PC, besides mining for cryptocurrencies:

  • Extract vital files from it.
  • Download other malware on your PC.
  • Collect your passwords./span>
  • Log the keystrokes which you have typed.
  • Collect information about other computers on your network, possibly to infect them as well.
  • Update itself.

The main activity of the 1sass.exe miner however is to connect your computer to a so-called mining pool – a virtual place which unifies all of the cryptocurrency miner devices in order to have a higher hashing power and then divides the mining profits among the wallets. Among those wallets is the wallet of the cyber-criminal, which is link to all of the computers that are infected by the 1sass.exe miner malware. This immediately results in the virus generating cryptocurrency tokens faster and faster as more computers become infected.

How to Detect and Remove 1sass.exe Miner Virus

In order to detect and remove this malware effectively, you will need to check for the 1sass.exe process on your computer, it is strongly recommended that you follow the removal instructions below. In case you do not feel that you will cope with removing the 1sass.exe manually, it is always better to go with the automatic removal option and download an advanced anti-malware software as security experts often advise is the most effective way to remove the virus fully, detect other threats and ensure future protection for your computer as well.


Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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