Fileless malware is shaping up to be the next big thing in cyber-security, and it will not go away soon. One such virus is the latest discovered BitCoin mining malware. This infection has the only purpose to mine BitCoin, Monero or other cryptocurrencies on the computer it has infected. For cryptocurrency mining to occur, the malware may run processes on the infected machine that may result in the significant over-usage of its resources, and it’s slowing down. And the worst part is that there are no files on your computer, meaning it is very difficult to detect it. If you believe you are infected with this BitCoin miner malware, we advise you to read this article to learn how to remove it from your computer and protect yourself in the future as well.
This post was originally published January 8, 2018, but we gave it an update July 30, 2019.
|Short Description||Aims to infect your computer and use it’s CPU, GPU and other resources to turn it into a miner for cryptocurrencies.|
|Symptoms||Heightened CPU and GPU usage and overheating. The victim PC may break if this virus mines for longer periods of time.|
|Distribution Method||Spam Emails, Email Attachments|
|Detection Tool|| See If Your System Has Been Affected by BitCoin Miner |
Malware Removal Tool
|User Experience||Join Our Forum to Discuss BitCoin Miner.|
|Data Recovery Tool||Windows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.|
Crypto Miner Mac – Update July 2019
Bitcoin Crypto Miner Mac virus is more widespread on Mac systems according to malware researchers and the recent AV-TEST. The reason behind it is that some of the higher end Mac machines are equipped with powerful hardware, which the miners want to use the resources of, to mine for digital currency since last year. More than 1,305 malware samples of the crypto miner mac category were detected
by AV-TEST. Trojans and other threats, different from the Crypto Miner Mac virus showed less results in the samples infecting Apple computer systems. This proves to show that the Crypto Miner Mac threat is a prominent one and it is logical that its authors want to utilize it in such a way. Beware of the Crypto Miner Mac malware and make sure to scan your computer for it.
BitCoin Miner Virus – Update July 2019
BitCoin Miners have started to spread across various devices, including Macs, hence they are also referred to as Crypto Miner Mac threats. Some of the most recent Mac threats that perform cryptocurrency mining activities have been reported to be the following:
CryptoCurrency mining viruses such as Crypto Miner Mac have continued to evolve and some of them are now capable of acting on themselves. Another one of those viruses is the new form of Rakhni Ransomware+Miner Trojan, which has been detected to be fully capable of droping an .exe file that is ran. This .exe file scans your computer and looks for the following parameters:
- If your computer has a folder, called BitCoin in the %AppData% directory.
- If your PC has a dual-core or higher processor.
If the virus checks that you have a BitCoin folder, it immediately estimates that you should be infected with ransomware because you can make a payment immediately. If not and you PC is on a dual-core and more powerful processors, the virus immediately runs a cryptocurrency miner, using your CPU and GPU to mine for the following cryptocurrencies:
- Monero Original.
You can find more information on the Rakhni miner below:
Besides this miner, we have detected a lot of new miner viruses out there with different capabilities. Some miner viruses were as harmless as to only mine your PC, while others, more hasty were completely able to display ads and also infect your PC with information stealing mawlare that directly steals your data.
- Service_box.exe Miner
- Valhalla Miner
- Debug.exe Miner.
- WaterMiner malware.
- Miner.exe virus.
- JS:Cryptonight Miner
- Moloko Trojan Miner.
- Auto Refresh Plus Adware Miner malware.
- Harvest Miner.
- Android Mobile Miner.
- Svchost.exe Miner.
- Brocoiner Coinhive Miner
- Websock.exe Miner.
- Digmine Facebook Messenger Miner
- CPU Miner (gw64.exe).
- CCminer.exe Malware.
- SiaCoin Miner
How Does BitCoin Miner Infect
At this point, it is not clear as to what the exact infection method of this mining malware is. However, it may appear on your computer as a result of executing multiple different types of malware previously executed on your computers, such as Trojans, Worms, and others. The methods of distribution and infection vary, but they may be conducted via:
- Malicious web links posted as a spam message online.
- Web links that exist In various forms, as fake buttons or altered banners on a website as a result of having a PUP on your computer.
- Via malicious e-mail spam attachment with a convincing message to open it.
The infection process itself is conducted with the aid of one of the exploits used in the WannaCry and NotPetya ransomware outbreaks which came out earlier this year. The exploit is known by the name EternalBlue and is a zero-day type of exploit for Windows versions from Windows XP up to Windows 10. Fortunately, Microsoft has released patches for the exploit, so anyone who has a legitimate Windows installation should immediately:
Analysis of BitCoin Miner
The primary region affected by this ransomware, also dubbed by TrendMicro researchers as COINMINER.QO trojan is the Asia-Pacific region with the largest percentage of infected devices to be detected in Japan, followed by Indonesia and Taiwan.
As stated before, the BitCoin miner uses the Windows Management Instrumentation service (WMI), which has an application, called scrcons.exe, used to execute scripts. Altogether, the malware becomes completely invisible, because it does not drop any types of files on the computers infected by it.
The malicious activity of the virus is comprised of executing multiple malicious scripts on the infected PC by a backdoor which the BitCoin miner malware runs beforehand. These scripts have the purpose to connect the virus to a control and command server.
Furthermore, besides connecting to one command and control server, the virus also connects to a C&C server again, most likely used for communication. It then uses different classes to execute further scripts that allow for various actions to take place:
- Remove control of the virus.
- Download the cryptocurrency mining software and execute it filelessly.
- Add the victim PC to a mining pool network in which all infected computers are also added.
Update December 2017 – New BitCoin Miners Detected
Being very similar to one of the Adylkuzz Trojan, the Bitcoinminer.sx may come on your computer via malicous e-mails sent over the web, that deceive you into thinking you are receiving an invoice, banking statement, receipt or a purchase letter for a product. The miner malware may even have advanced capabilities, like to update itself or install other miners on the computer of the victim a s well as collect keystrokes and other crucial data.
Upup.exe BitCoin Miner
Similar to Bitcoinminer.sx, the Upup.exe malware also aims to use the CPU and GPU resources on the computer of the victim by connecting the computer to a mining pool. In addition to this, the malware also modifies the registry sub-keys, responsible for the Certificats in order to obtain certain permissions later on, like network information, system details, passwords and other data.
Service.exe Virus Process
This malware is of unknown origins and most of what is known about it is that it uses a fake Service.exe process in order to perform the mining operation. The virus used to infect victims by posing as a fake document, program setup, patch or software license activator and it was primarily spread via malicious e-mail spam messages. It was also reported by experts to have Trojan capabilities, meaning that it may steal your login information, like passwords, user names and may also update itself and remotely control your PC.
WDF.EXE CryptoMiner Trojan
The WDF.exe is one of two processes which are dropped on a newly created folder, named “wdf”. The folder of this miner Trojan horse is located in the %Windows% directory and it also contains the taskmon.exe malicious file, which may also install other miners on the victim’s computer, such as a miner, reported to activate a process, named NvProfileUpdater64.exe.
How to Detect and Remove BitCoin Miner Malware
Since this is malware from the fileless type, meaning it does not drop any files on your computer, your best bet is to manually interact with the following root classes:
Since those classes are used to trigger the malicious script, they cannot be interacted with by simply disabling WMI as shown above. So this is why manual removal of BitCoin miner may be a challenging process.
The best practice to detect the malicious processes running in the background of your computer and associated with BitCoin miner is to automatically scan for them with malware-specific removal software. This will also ensure that these malicious objects are removed safely, without risking to damage critical Windows Components by manually removing them. For more information and an option on how to remove BitCoin fileless miner, one method is to follow the instructions below.