Mikrotik routers behind massive botnet
KOM last edited by KOM
A titanic and ongoing DDoS that hit Russian Internet search giant Yandex last week is estimated to have been launched by roughly 250,000 malware-infected devices globally, sending 21.8 million bogus requests-per-second. While last night's Meris attack on this site was far smaller than the recent Cloudflare DDoS, it was far larger than the Mirai DDoS attack in 2016 that held KrebsOnSecurity offline for nearly four days. The traffic deluge from Thursday's attack on this site was more than four times what Mirai threw at this site five years ago. This latest attack involved more than two million requests-per-second. By comparison, the 2016 Mirai DDoS generated approximately 450,000 requests-per-second.
According to Qrator, which is working with Yandex on combating the attack, Meris appears to be made up of Internet routers produced by MikroTik. Qrator says the United States is home to the most number of MikroTik routers that are potentially vulnerable to compromise by Meris — with more than 42 percent of the world's MikroTik systems connected to the Internet (followed by China — 18.9 percent- and a long tail of one- and two-percent countries). It's not immediately clear which security vulnerabilities led to these estimated 250,000 MikroTik routers getting hacked by Meris. "The spectrum of RouterOS versions we see across this botnet varies from years old to recent," the company wrote. "The largest share belongs to the version of firmware previous to the current stable one."