Best mining coin 2021 iso torrent
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Content:
- An Innovative Browsing Solution
- Linux Mint Backdoor Puts Users and Bitcoin Miners at Risk
- Download Atomic Wallet
- 36 Blockchain Games to Play in 2021 – Play to Earn NFT & Crypto Rewards
- Visualizing the Power Consumption of Bitcoin Mining
- Top Web 3.0 Cryptos for 2022
- IPFS powers the Distributed Web
- Daofile bypass
- Blockchain, Self-Sovereign Identity and Digital Credentials: Promise Versus Praxis in Education
- News archive
An Innovative Browsing Solution
In the first posting of this series, we looked at a clipboard stealer belonging to the MyKings botnet. In this second part of the blog series, we will discuss in detail a very prevalent malware family of AutoIt droppers, that we call CoinHelper, used in a massive coinmining campaign.
Since the beginning of , Avast has protected more than , users worldwide from this threat. We have even seen this threat bundled with clean software such as Logitech drivers for webcams. All in all, we have seen CoinHelper bundled with more than 2, different software so far, including games, game cheats, security software, utilities, clean and malware applications alike.
We have found some mentions of these AutoIt droppers in other blog posts from last year. One of the most notable instances was detailed by Trend Micro , describing a sample of the AutoIt dropper bundled with Zoom communicator downloaded from an unofficial source which happened in the early days of the COVID pandemic when millions of new users were flocking to Zoom.
Another instance is in a post from Cybereason mentioning a new dropper for XMRig miners. In this blog post, we analyze the latest version of CoinHelper in detail, discuss the malware campaign, describe all its components as well as research into what applications are most often bundled with the malware and show how the malware spreads.
We also outline some of the data harvesting that it performs on infected systems to map the infected victims. Since the beginning of , we have seen more than , attempts to infect our users with CoinHelper, most of them being in Russia 83, The second most targeted country is Ukraine with more than 42, attacked users. Even though we observed that multiple crypto currencies, including Ethereum or Bitcoin, were mined, there was one particular that stood out — Monero.
From the total of crypto wallet addresses we extracted from the malware, of them mined Monero through crypto mining pools. The reasons for criminals to choose Monero are quite obvious. Firstly, this cryptocurrency was created and designed to be private and anonymous. Even though Monero is designed to be anonymous, thanks to the wrong usage of addresses and the mechanics of how mining pools work, we were able to look more into the Monero mining operation of the malware authors and find out more about how much money they were able to gain.
To ensure more regular income, the miners were configured to use Monero mining pools. Mining pools are often used by miners to create one big and powerful node of computing power that works together to find a suitable hash and collect a reward for it. Because the search for the suitable hash is random, the more guesses you make, the bigger your chance to be successful. In the end, when the pool receives a reward, the money is split between the members of the pool depending on their share of work.
Usage of the pools is very convenient for malware authors, specifically because pools work with a limited time. This is helpful for malware authors because it gives them a greater chance to successfully mine cryptocurrency in the limited time they have before their miners are discovered and eradicated. In total we registered Monero addresses used in the configuration of miners dropped by the AutoIts.
These addresses were used in more than 15 different Monero mining pools whereas our data and research confirm that the mining campaign is even bigger and a lot of the addresses were used across multiple pools. Apart from the Monero addresses, we also registered 54 Bitcoin addresses and 5 Ethereum addresses. After looking at these addresses we can conclude that these addresses received following amounts of money:.
This makes total monetary gain of this malware , After downloading and unpacking the archive with a password gh , a new sample Launcher. In other, and most common, cases the user obtains a whole bundled installer from the internet, unintentionally executing the AutoIt during the installation of the expected software. This sample is the first stage of a compiled AutoIt script, a dropper that we call CoinHelper, which provides all necessary persistence, injections, checking for security software along the way, and of course downloading additional malware onto the infected machine.
Although this sample contains almost all of the latest functionality of these AutoIt droppers, it is not the latest version and some of their features are missing. For that reason, we decided to take a newer but very similar version of the dropper with a SHA 83a64cd9a10f3a19eabed41e58f0beecbd19bb4ca10ec5fccdbf instead and describe thoroughly all of the functionalities in one place.
This one is usually downloaded with a name start. Upon a closer look, it is apparent that this is a compiled AutoIt binary. The last binary from the list above, placed in the glue folder, is one of the many possibilities of the bundled apps inside CoinHelper. In this case, we witness a clean setup installer of the Chrome browser. If you are interested in seeing what other applications are usually bundled with CoinHelper, see Bundled apps overview for details.
The AutoIt script is actually very readable. Well, perhaps even too much, looking at the vulgarity in the beginning. In this case, however, the script starts with the EndRegion clausule and some well known AutoIt decompilers, such as Exe2Aut v0. Note that myAut2Exe v2. As shown in the code above, the SystemCheck scheduled task presents itself as a Helper. The scheduled task is used for executing the malware, persistently. The modification of the asacpiex.
The script is replacing even more bytes, but that is not necessary. We will continue with the unpacking of asacpiex. In the code above, we also see that ChromeSetup. This folder sometimes called differently, e. In our analysis we are showing here, this is a clean installer of the Chrome browser that is also executed at this stage to preserve the expected behavior of the whole bundle. We encountered many different applications bundled with CoinHelper.
Research regarding these bundles is provided in a standalone subsection Bundled apps overview. In addition to fixing the damaged archive, executing the second stage, and ensuring persistence, the first stage holds one additional functionality that is quite simple, but effective. The malware uses public services, such as IP loggers, to aggregate information about victims. The IP loggers are basically URL shorteners that usually provide comprehensive telemetry statistics over the users clicking on the shortened link.
All the collected information is formatted and concatenated to a single string. From our dataset, we have found different URLs where the malware sends data. Because the attackers often use public services without authentication, we can actually peek inside and figure out the figures from their perspective.
As an example, we can see information available on one of the many still-active links containing a date and time of the click, IP address anonymized and ISP, corresponding geolocation, used web browser and of course, the user-agent string with the harvested data. In the sections below, the reader can find further details of how the information is obtained in the first stage of the malware, along with further details about the harvested data.
The malware executes one of the two variants of shellcodes x86 and x64 , present in hexadecimal form:. Thus, the malware effectively harvests all the information of the currently present processor of the victim, its model and features.
All the information is parsed and particular features are extracted. Actually, the feature lists in the malware are identical to the CPUID Wikipedia page, exactly pointing out where the attacker was inspired. Even though all the information is harvested, only the AES instruction set bit is actually checked — if the processor supports this instruction set and it is x64, only then it will install the x64 bit version of the final stage coinminer.
In the other case, the x86 version is used. As we mentioned, the rest of the information is collected, but it is actually not used anywhere in the code. The script also checks for running processes, searching for security solutions present on the machine. After the asacpiex. This is the most common password for these AutoIt droppers. However, it is not the only one and so far, we counted two additional passwords:.
Both of these files are once again compiled AutoIt scripts, carrying functionality to distribute further payloads, in the form of coinminers, to victims via Tor network.
After the decompilation of the files, we can see that both of the output scripts are very similar. In the text below, we will focus on the x64 version since it contains more functionality.
Although Helper. As we already mentioned, the primary goal of the Helper. The coinminer is executed with a hardcoded configuration present in the script. The main purpose of the dropper is to download a payload, in our case a coinminer, onto the infected system.
To do so, the malware performs several preparatory actions to set up the environment to its needs. First and foremost, the malware contains two additional files in hexadecimal form. This password is also required for unpacking every downloaded coinminer as well, but we will get to that later.
After Tor is executed, it listens on port on localhost To prevent confusion at this point, note that this execution is hidden by default because tor. The malware expects one of the standard protocol responses and only if the response contains 0x5A byte, the malware will further proceed to communicate with the server.
The lists of Tor addresses differ quite a bit across multiple samples. However, at the time of writing, only two of all the servers were still active:. If we access the server using e. Tor browser, we can see a default Windows Server landing page, illustrated in figure below.
However, this single fact is not sufficient for attributing CoinHelper to MyKings. The files The upd. After the end stub is removed and the string decoded, we get a 7zip archive. These files are once again present in a hexadecimal form, this time starting with 0x prefix and without the end stub. The coinmining and the 7zip unpacking is executed via process injection. Execution of all the other components, such as GPU mining or unpacking of the coinminer payloads downloaded from Tor, is done by injecting into itself, meaning a new suspended instance of Helper.
Which query should be used is defined in the configuration of the AutoIt script. Similarly to the first stage, at the beginning of the second stage, particular mutexes are checked and created if necessary:.
The second mutex has an appended 2 as a constant. For the sake of staying hidden for the longest time possible, the malware checks several processes using a native AutoIt ProcessExists function for any running system monitoring and analysis tools:.
Linux Mint Backdoor Puts Users and Bitcoin Miners at Risk
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Download Atomic Wallet
Learn to code and make your own app or game in minutes. However, got to get this up on the site… The best part of this online game, is the ability to save a downloadable file for some future day. The very first thing you're going to need to start collecting enough Doge to have a Scrooge McDuck-style vault is a wallet. For we have a range of new calculations. There is a cloud save feature that works by logging in with Google. Debug log and event log sizes increased. Mining the coin you need automatically, earning any of the presented cryptocurrencies.
36 Blockchain Games to Play in 2021 – Play to Earn NFT & Crypto Rewards
Cryptocurrency prices rebounded and were trading with moderate gains on May The crypto market has been on a free fall for the last two weeks amid environmental concerns related to bitcoin mining , China's ban and mixed cues from one of its biggest proponent Elon Musk. After announcing the suspension of BTC as payments for Tesla citing "rapidly increasing use of fossil fuels for Bitcoin mining" earlier this month, Musk seems to have had a change of heart recently. However, the total cryptocurrency market volume saw 14 percent over the last 24 hours. Here are the prices of the 10 largest cryptocurrencies at 8.
Visualizing the Power Consumption of Bitcoin Mining
Cryptocurrencies have been some of the most talked-about assets in recent months, with bitcoin and ether prices reaching record highs. These gains were driven by a flurry of announcements, including increased adoption by businesses and institutions. Lesser known, however, is just how much electricity is required to power the Bitcoin network. This requires them to solve numerical puzzles which have a digit hexadecimal solution known as a hash. Miners may be rewarded with bitcoins, but only if they arrive at the solution before others.
Top Web 3.0 Cryptos for 2022
Build your own mining business and become an idle miner tycoon in this fun game! Automate your workflow and collect your idle cash income, even when you are offline! Become an industrial tycoon by managing your mine and idle profit! Take on the challenge and discover the best mining strategy and earn as much cash as possible! Feel free to send a message to community idleminertycoon. Write us an email: community idleminertycoon. I play idle miners almost every single day and wonder to myself how could this game be better and more fun.
IPFS powers the Distributed Web
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Daofile bypass
Cryptocurrencies have become favorites of adventure-loving investors due to their high returns. Cryptocurrency offers lucrative returns in the short term though the risk involved is quite high. This has led to the emergence of thousands of cryptocurrencies in the crypto market. But there are many other cryptos that have emerged in the recent past and have returned heavily to their investors.
Blockchain, Self-Sovereign Identity and Digital Credentials: Promise Versus Praxis in Education
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News archive
Daofile bypass The custom DA file should now be loaded. Server load: 4. Daofile bypass Daofile bypass.
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