“When an attacker is using a good config file it can be almost impossible to distinguish the attacks from legitimate login requests. Temple added that the config file will tell the tool how a website handles login requests, understand what captcha is running and know how many requests per proxy should be attempted. “The combo list credentials will be valid somewhere.” “As you are not brute forcing using the same user account, you’re never going to lock an account,” he said.
However, this is targeted at specific websites. He said that if an attacker wanted to do a brute force attack, they could use a large combo list (500,000+ credentials), but would need to set up a config file and get the proxy to configure it for multiple tries to not get blocked. Temple explained that while Sentry MBA is being traded on hacker forums, the real value is in combo and config lists, which contain user credentials for websites. “The real value is in the configuration files as it tells the tool how to attack a specific website these are often traded on hacker forums for significant sums.” “The tool is easy to use and draws information from three data sources to mount an effective attack: a configuration file to align the attack to a specific target a “combo list” (list of valid usernames and passwords) and a list of proxies from which to relay the attack,” he said. He explained that to use Sentry MBA effectively, the attacker needs to use a combination list of credentials and a configuration file that relates to the target. Speaking to Infosecurity, JUMPSEC managing director Sam Temple said that Sentry MBA works by harnessing proxies to conduct attacks. A tool which facilitates attacks on login frames has been responsible for a number of attacks.
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