Bitcoin mining script
Cryptomining is the process by which cryptocurrency transactions are verified and added to a public ledger, known as the blockchain. At the same time cryptomining is also the mean by which new cryptocurrency coins are released. Cryptomining is profitable for its operator. One of the latest trends in this area is Coinhive, a legitimate piece of code that performs cryptomining in browsers. Coinhive is used by website owners as an alternative source of income in addition to other sources, e.
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- Advanced Cryptocurrency | [Mining / Management]
- Opera Offers First Built-In Cryptojacking Protection Tool
- Bitcoin Miner Script
- A teenager and his sister say they make $35,000 a month by mining Bitcoin
- An Overview of Cryptojacking & Useful Tips on How to Prevent Cryptojacking
- Now even YouTube serves ads with CPU-draining cryptocurrency miners
Advanced Cryptocurrency | [Mining / Management]
In late March , a vulnerability in Jenkins dynamic routing was documented and reported on by Rapid7, but in early June, F5 researchers found a new, more sophisticated campaign exploiting this same vulnerability. References to the specific CVEs leveraged are in the footnotes. While analyzing this script which downloads and executes the cryptominer, F5 researchers found that the code is sophisticated, well obfuscated, and long—about lines versus the typical 20 or so lines.
The authors clearly put a lot of time and attention into every step, from developing the malware dropper to creating the executable JAR file and finally, executing the remote code execution RCE in order to install the cryptominer. Notably this script was written in bash and python; it is not compiled code. Though leveraging the Groovy plugin metaprogramming in order to exploit Jenkins Dynamic routing is common, the method the author uses is somewhat unique.
When a cryptominer is installed, it uses valuable computational resources in order to mine different cryptocurrencies. Along with rising electric bills, this means your computer would be running at full speed all the time.
This can cause heat damage to hardware and slower performance for applications. For both enterprises and individuals, this can be costly; the attacker is the only one who profits. NTP is a bash script that is long and complicated. This is significant because these files are typically short and concise. Since cryptominers have become ubiquitous in the cybercrime landscape, the author may be adding this level of complexity to ensure that his or her cryptominer is installed and runs.
The NTP script checks to see if it has root permission. If not, it checks to see if it can get sudo root permission. It will then execute itself with those permissions. This is a common thing for malware to do as it wants to act with the highest level of access possible. This bypasses the restriction that may be on a target system if the target system has protected SSH.
Once complete, the NTP script deletes the content of tmp folder. This folder is usually used by malware to store malicious files. This is typical of malware that downloads and installs crypto miners because it wants to use as many resources as possible on a target system. By identifying and killing any competing cryptominers, it frees up more CPU resources. This is done in order to find other processes related to crypto mining, presumably in order to stop competition.
Along with checking for competing cryptominers, the NTP script checks to see if the machine is using a proxy. Researchers can only hypothesize why this is done, but one possible reason could be to look for traffic monitoring or to stop any alerts that proxies may use.
This is not a very common feature in most malware, but it eliminates any competing cryptominers that may be trying to maintain persistence on the target this way. Other campaigns use this file to sinkhole the traffic of other cryptominers. This is probably an attempt to remove it. Another unique feature of this comprehensive malware is that it looks for different Linux distributions running on the machine. Next, the NTP script takes this personalization one step further.
It defines specific cron jobs for persistence using the created paths. The NTP script is careful to check the specific Linux distribution on the server and adds the cronjob to the path that matches the distribution.
This level of detail is not common in malware, but this malware is very persistent in trying to install and run its miner. After installing these cron jobs, the NTP script downloads a baseencoded bash file called main, decodes it, and executes the resulting script. This is not surprising as TOR is often used by malware authors and other actors who have malicious intent in order to hide their identity and prevent attribution.
If it is, the script attempts to disable it by rewriting the config file and restarting the system. SELinux stands for Security Enhanced Linux and is a Linux kernel security model which, among other things, adds in access control rules.
Having SELinux enabled on a device may make it more difficult for a malicious actor to get the highest level access that they need. It reuses some of the same code from the NTP script and adds new functionality. This redundancy is notable as it shows that the malicious actor is concerned with ensuring the cryptominer can be installed and will execute properly. The downside is that this redundancy also makes the files bigger, which makes them more likely to be caught by a user or an antivirus program.
After attempting to uninstall security utilities, it attempts to connect to other hosts, establish persistence, and install a cryptominer—the ultimate goal of this exploit. This sophisticated, complicated, obfuscated code shows the advancement of cyber criminals. Notably, these advancements in low-level crime can work their way up the chain and be indicators of what is to come from advanced persistent threats and state-sponsored actors.
This is in an effort to spread the malware. Services started and stopped in the rc. They are executed during the boot-up process of the system by the root user on the system. The goal of this malware is to execute a cryptocurrency miner. If it was, the script deletes the old miner. The choices are:. This is one more attempt by the author to obfuscate the true use of any of these files.
Once unzipped, the file exposes a cryptocurrency miner that will work on the target system—specific to the architecture designated above. Following successful installation and running of this cryptominer, the malware attempts to spread further. The short python script downloads a bigger baseencoded python script and executes it, as well.
The bigger python script essentially serves as a scanning tool for misconfigured Redis instances. The tool generates a random IP list and scan it in an attempt to find Redis instances. The script then checks to see if each particular Redis instance is misconfigured and does not require authentication. If it is possible to log in without authentication, the script proceeds to exploit it and force it to execute a copy of the NTP script and to add an SSH key to the machine.
The Jenkins dynamic routing vulnerability is the initial infection vector, and the malware will continue to spread this way, however, the method described is another way in which this module spreads and perpetuates itself.
Once this is complete, the script then enters an infinite loop that serves as a watchdog. The watchdog script serves to make sure the program is continually running. The second function makes sure the miner and python scanning tool are running and if not, executes these programs again.
This malware, which executes upon successful exploitation of the Jenkins dynamic routing vulnerability is just one example of the more complex and sophisticated exploits that result in the installation of a cryptominer.
The length and sophistication of this code indicates that someone with experience had very specific and focused intentions for this malware. F5 Labs researchers predict that as long as cryptomining remains lucrative for cyber criminals, they will continue to make sophisticated advances in their methods and attempts to install and exploit vulnerable systems. It is important for both enterprise and individuals to remain vigilant about monitoring exactly what is running on their systems.
The following security controls are recommended to mitigate these types of attacks:. The information you provide will be treated in accordance with the F5 Privacy Notice. Welcome back! Need to change your email or add a new one? Click here. Prior to F5 she worked for a large national laboratory conducting vulnerability assessments, and research on current threats as well as an civilian analyst for the US Department of Defense.
Her specialty areas of research include mobile vulnerabilities, Industrial Control Systems, and Eastern European threats. Andrey Shalnev is a security researcher for F5. Previously, he worked as a penetration tester at Citadel Consulting. So, we get to work. We obsess over effective attack methods. We monitor the growth of IoT and its evolving threats. We dive deep into the latest crypto-mining campaigns. We analyze banking Trojan targets.
We dissect exploits. We hunt for the latest malware. And then our team of experts share it all with you. For more than 20 years, F5 has been leading the app delivery space. With our experience, we are passionate about educating the security community-providing the intel you need to stay informed so your apps can stay safe. Search Submit. Attack Campaign. October 01, By Remi Cohen Andrey Shalnev. Attack Type: Web Application Attacks. Client-side Attacks. Attack Method: Abuse of functionality.
Client-platform malware. Vulnerabilities: CVE Attack Motive: Cybercrime. Malware Type: Crypto-miner. App Tiers Affected:. In June , F5 researchers discovered a new malware campaign exploiting a Jenkins dynamic routing vulnerability. The goal of this campaign is to install a cryptominer.
Opera Offers First Built-In Cryptojacking Protection Tool
By Elmira Tanatarova For Mailonline. Kazakhstan , the world's second largest miner of Bitcoin , has shut down its crypto mines until the end of January. The state electricity provider KEGOC made the decision to cut the supply to the miners after millions were affected by power outages across three countries in Central Asia last week. Blackout across Central Asia last week left millions without electricity, which affected traffic control in several areas. Pictured, Bishkek, Kyrgyzstan.
Bitcoin Miner Script
It was released on May 20, These transactions provide security for the Bitcoin network Centric Mining Systems is an industry-standard platform for predictive and prescriptive analytics. Generally, the FPGA will not communicate directly to a mining pool, instead there will be some associated software running on a …. Top Miners. We are here to help. It is much more different they what we are used to GPU mining, it is lot more tricky to setup and start mining with these kind of boards. Project maintainers. For a given mining algorithm, there is definitely a technology progression. Please note miners are often marked as malware by antivirus programs. TeamBlackMiner v1.
A teenager and his sister say they make $35,000 a month by mining Bitcoin
If was the year of the ransomware attack, then , insofar as it can be defined by malware, was the year of cryptojacking. In early , the cryptocurrency market hit unprecedented levels, leading to a boom in cryptocurrency mining, both legal and illicit. And now, while the dizzying highs of cryptocurrency prices and the bitcoin bubble is it fair to call it a bubble now? Cryptojacking works by—you guessed it—hijacking other people's processing power and using it to mine cryptocurrencies. This is typically achieved with scripts that run behind the scenes on websites, though it's also possible to hijack machines and servers to run full-blown cryptocurrency mining software, which is either installed by malware or by rogue employees.
An Overview of Cryptojacking & Useful Tips on How to Prevent Cryptojacking
In previous crypto-mining attacks, we observed hackers investing little to no effort in hiding their malicious activities. They just ran the malicious container with all of its scripts and configuration files in clear text. This made the analysis of their malicious intent fairly easy. One such cryptocurrency-mining attack was previously identified, with a malicious container image that was pulled from a public Docker Hub repository named zoolu2. It contained a number of images including Shodan and cryptocurrency-mining software binaries.
Now even YouTube serves ads with CPU-draining cryptocurrency miners
Beginning of dialog window. This dialog displays large versions of the images from the page. Use the left and right arrow keys to see next or previous image. Use the escape key to close the dialog. Over the past few months, you might have experienced your phone running out of battery and getting overheated.
Big brother brands report: which companies might access our personal data the most? Higher electricity bills, slow response times, computer overheating, or increased processor usage could be a sign of an attack. Cryptojacking rose to fame in when the well-known cryptocurrency Bitcoin was booming. Around this period, Coinhive emerged too.
Bitcoins are created through a process called mining. Mining involves using lots of processing power to solve mathematical problems for rewards: 6. At the current price, mining can be very profitable for those with the hardware in place, or for people who contribute their personal processing power to a larger mining pool, where they can collaborate with others and receive a portion of the reward when a block is solved. These are two conventional methods of mining Bitcoin but a third, shadier practice exists — hijacking processing power from unsuspecting computers.
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Security researchers recently analyzed various spam campaigns and discovered a new one related to Bitcoin cryptocurrency that is impacting a lot of websites. For the past months, Bitcoin gained a lot of attention and reached high price levels, followed by various fluctuations. The process of mining consists of verifying other Bitcoin transactions, which users are rewarded for, and is supposed to keep transactions safe and secure.
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