Qihoo 360 (360 Netlab) experts report the discovery of a new Fodcha botnet that launches DDoS attacks on hundreds of victims every day. According to the company, the threat is growing rapidly and is replenished with new bots, including routers, DRVs and vulnerable servers.
From March 29 to April 10, the Fodcha botnet included more than 62,000 devices. The number of unique IP addresses associated with the malware fluctuates, with experts monitoring around 10,000 Fodcha bots using Chinese IP addresses every day, with most of them using the services of China Unicom (59.9%) and China Telecom (39.4%).
Fodcha is known to infect new devices using exploits designed to use vulnerabilities in a number of devices, as well as the Crazyfia brute force tool. The list of devices and services that Fodcha attacks include:
- Android: Android ADB Debug Server RCE;
- GitLab: CVE-2021-22205;
- Realtek Jungle SDK: CVE-2021-35394;
- MVPower DVR: unauthenticated execution of shell commands in JAWS Webserver;
- LILIN DVR: LILIN DVR RCE;
- TOTOLINK Routers: backdoor in TOTOLINK routers;
- ZHONE Router: Web RCE in ZHONE routers.
Fodcha operators use the results of Crazyfia scans to gain access to vulnerable devices and then deploy malware payloads on them. Experts write that the botnet can be capable of MIPS, MPSL, ARM, x86 and other architectures.
The botnet is known to have been using folded[.]in as the domain for the command-and-control server since January 2022, and switched to fridgexperts[.]cc in March when the cloud service provider disabled the first domain.