KmsdBot botnet is down after operator sends typo in command
Security researchers at the content delivery network first spotted KmsdBot earlier this month, noting that it was dangerous in part because it used SSH connections with weak login credentials to infect targets. According to Akamai, the botnet was able to mine cryptocurrencies, but had also been used to launch DDoS attacks, with most of its targets associated with the gaming, tech and luxury automotive sectors.
"During the testing, we noticed the botnet stopped sending attack commands after observing a single malformed command," Cashdollar said.The command was likely intended to DDoS Bitcoin.com by tossing junk data at it, but check out that lack of space between the URL and port number. Oops. Most sophisticated software would know how to handle that, but not so for KmsdBot.
After reconstructing the command and tossing it at their internal KmsdBot, the Akamai researchers noticed that lack of space between URL and port number caused the Go binary to crash, throwing up an"index out of range" error because the wrong number of arguments were supplied. The command"likely crashed all the botnet code that was running on infected machines and talking to the C2," Cashdollar said."In our world of zero-days and burnout, seeing a threat that can be mitigated with the coding equivalent of a typo is a nice story." ®
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