Security researchers from Netlab, a network threat hunting unit of Chinese cyber-security giant Qihoo 360, have discovered the first ever malware strain seen abusing the DNS over HTTPS (DoH) protocol.
The malware, named Godlua, was detailed in a report published on Monday by the company’s researchers.
According to the Netlab team, Godlua is a malware strain written in Lua, which acts like a backdoor on infected systems. It’s written to work on Linux servers, attackers are using a Confluence exploit (CVE-2019-3396) to infect outdated systems, and early samples uploaded on VirusTotal have mislabeled it as a cryptocurrency miner.
But Netlab researchers say the malware actually works as a DDoS bot and they’ve already seen it being used in attacks, with one aimed against liuxiaobei.com, the homepage of a Liu Xiaobei fan site.