China’s Crypto Crackdown Delivers Windfall To Global Bitcoin ‘miners’

Yes, in fact, Europe is one of the easiest places to buy cryptos in general. It’s early in 2018 and we have already witnessed one of the top contenders in this year’s web application attacks. It’s the best way to mow the lawn. Monero is also used as a way to launder money made illegally. Monero has a market capitalization of more than 3 billion USD. All the cryptocurrencies that we saw attackers trying to mine are more anonymous. This kind of attack is mostly profit based since the attackers can provide DDoS for hire services. Next, we will follow an attack found in the wild, and through it try to understand the way that a crypto-mining malware works. The difference is that in this payload the script enlists the vulnerable server to a DDoS botnet where it will participate in a DDoS attack on demand. The following attack (figure 3) was found in the post body of an HTTP request that was trying to exploit an RCE vulnerability to send a wget command to download and run a script. ​Th is article h as be​en written with GSA Content᠎ G᠎en erator DEMO!

For example, attackers targeting Windows servers, used a Powershell command to download a file from an external location (figure 1). Attackers targeting Linux servers, used Bash scripts, and wget or curl commands for the same purpose. First, it kills processes that are running in the background of the server (figure 4). These processes include mostly competing crypto miners, but also security controls and processes that use a lot of CPU. The script turns the server into a miner for some crypto currency, most notably Monero. Each time such a problem is solved, the miner who solved it gets a fixed amount of coins, depending on which coin she or he was mining. For example, currently, bitcoin miners get 12.5 bitcoins ($115,812.44) each time such a problem is solved. For example, in a previous post we discussed RCE vulnerabilities related to insecure deserialization. In this post we will analyze these attacks, drill down into a malicious crypto-mining script, try to “follow the money”, and check if these attacks really are that profitable for attackers. In this kind of attack, the attackers eliminate the need to sell their product to a third party and thus achieve a faster return on investment. To mine Bitcoin a specific hardware is required or requires the use of GPU which allows more parallelization of the computation, thus improving the mining process. Con​tent has been creat​ed  by G᠎SA Content G᠎enerator  DE MO !

Thus for a miner, whatever revenue he or she generates from the mining process has to cover these costs, as well as the original amount invested in the mining hardware. Send the profit of the mining process to the wallet. When the process is completed, the first miner who cracked the code would be rewarded, or earned their small amount of coins, which could be referred to as service fee. Whether you’re an at-home hobbyist or a miner with a huge warehouse space, FPGAs may work for you. Cryptocurrency mining is how miners compete to prove their computational work in exchange for a block reward. After a series of transactions for a specific cryptocurrency, a block with associated cryptographic hash functions containing transaction data becomes visible to the blockchain’s P2P network. Proof of work and proof of capacity both require the use of hash functions. When your network reaches a hash rate of 5 Th/s, it could make 5 trillion calculations per second. At that point in time the attacker made around 41 Monero, which translates (in current Monero to dollar rate) to around $10,000. In current scenario only if you allocate more hashrate you’ll be able to run a profitable mining operation.

Polish police have uncovered a secret crypto mining operation at their headquarters in Warsaw, local media reported. In recent attacks we have seen a lot of malware using it to mine Monero. According to our research, in December 2017 almost 90 percent of all the malicious payloads in RCE attacks that sent a request to an external location were crypto-mining malware. In these types of vulnerabilities attackers can tamper with serialized objects that are sent to the web application. In the past, RCE payloads that sent requests to an external location included mostly attempts to infect servers with malware that added the vulnerable servers to a DDoS botnet. DDoS botnet- this payload tries to download. Attacks using this type of payload mostly included many requests to a specific server, each request targeting a different parameter. These attacks try to exploit vulnerabilities in the web application source code, mainly remote code execution vulnerabilities, in order to download and run different crypto-mining malware on the infected server.

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