In accordance with Secureworks, info stealer malware, which consists of code that infects devices without the user's knowledge and steals data, is still widely available for purchase through underground forums and marketplaces, with the volume of logs, or collections of stolen data, available for sale increasing at alarming rates.
Between June 2021 and May 2023, the Russian market alone grew by 670%.
“Infostealers are a natural choice for cybercriminals who are looking to rapidly gain access to businesses and then monetize that access,” said Don Smith, VP of threat research, Secureworks CTU.
“They are readily available for purchase, and within as little as 60 seconds of installation on an infected computer will immediately generate a return on investment in the form of stolen credentials and other sensitive information. However, what has really changed the game, as far as info stealers are concerned, is improvements in the various ways that criminals use to trick users into installing them. That, coupled with the development of dedicated marketplaces to sell and purchase this stolen data, has really upped the ante,” added Smith.
Researchers at Secureworks examined the most recent trends in the underground info stealer market, including how this sort of malware is growing more complex and harder to detect, offering a challenge to corporate network defenders. Among the key findings are:
The number of info stealer logs for sale on underground forums grows with time. The number of logs for sale on the Russian market alone surged by 150% in less than nine months, from two million on a single day in June 2022 to over five million on a single day in late February 2023.
The overall growth rate for the number of logs for sale on the Russian market was 670% over a roughly two-year period (measured on a single day in June 2021 and a single day in May 2023).
The Russian market continues to be the largest seller of info stealer logs. At the time of writing, Russian Market has five million logs for sale, which is around ten times more than its nearest competitor.t is well-known among Russian cybercriminals and is often utilized by threat actors globally. Recently, Russian Market has included logs from three new thieves, indicating that the site is adapting to the ever-changing e-crime scenario.
Raccoon, Vidar, and Redline remain the top three info stealer logs for sale. On a single day in February, the following logs, or data sets of stolen credentials, were for sale among these popular info stealers on the Russian Market:
- The number of raccoons is 2,114,549.
- Vidar: 1,816,800
- The redline is 1,415,458.
The recent law enforcement effort against Genesis Market and Raid Forums has influenced the behavior of cybercriminals. Telegram has benefited from this, with more log buying and trading going to specialized Telegram channels for prominent stealers like RedLine, Anubis, SpiderMan, and Oski Stealer. Despite the arrests of several users and the removal of 11 domains affiliated with Genesis Market, the Tor site remains operating, with logs still for sale.
However, activity on the marketplace has nearly ceased, as criminals have begun debating the matter on underground forums, raising concerns about the platform's reliability. A rising market has evolved to address the demand for after-action solutions that aid with log parsing, a time-consuming and difficult operation that is often left to more experienced hackers.
As the number of info stealers and available logs grows, these tools are expected to become more popular and assist to decrease the entry barrier. The successful development and deployment of info stealers, like the overall cybercrime ecosystem, depends on individuals with diverse skills, jobs, and responsibilities. The growth of malware-as-a-service has encouraged developers to innovate in order to better their products and appeal to a broader spectrum of clients.
For example, Russian Market now allows customers to preorder stolen credentials for a certain organization, business, or program for a $1,000 deposit into the site's escrow mechanism. The pre-order service offers no guarantees but allows crooks to progress from opportunistic to targeted.
“What we are seeing is an entire underground economy and supporting infrastructure built around infostealers, making it not only possible but also potentially lucrative for relatively low skilled threat actors to get involved. Coordinated global action by law enforcement is having some impact, but cybercriminals are adept at reshaping their routes to market,” continued Smith.
“Ensuring that you implement multi-factor authentication to minimize the damage caused by the theft of credentials, being careful about who can install third-party software and where it is downloaded from, and implementing comprehensive monitoring across host, network and cloud are all key aspects of a successful defense against the threat of infostealers,” concluded Smith.
Phishing, compromised websites, malicious software downloads, and Google advertisements can all be used to install info stealers on a computer or device. Stolen credentials accounted for nearly one-tenth of the incident response engagements Secureworks was involved in 2022, and were the initial access vector (IAV) for more than a third (34%) of ransomware engagements from April 2022 to April 2023.
