ThinkPHP  - ThinkPHP Vulnerability - Hackers Exploiting ThinkPHP Vulnerability To Expand Botnets

actors actively exploiting the patched ThinkPHP remote code execution vulnerability to gain control over the web servers.

Trend Micro observed the new campaign in which the Cybercriminals exploiting ThinkPHP Vulnerability to expand the Hakai and Yowai Botnets.

In this campaign threat, actors used botnets to websites using the vulnerability in the framework invoke function method to execute malicious code on the server.

“Cybercriminals use websites created using the PHP framework to breach web servers via dictionary attacks on default credentials and gain control of these routers for distributed denial of service attacks (DDoS).” reads Trend Micro blog post.

ThinkPHP  - think1 - Hackers Exploiting ThinkPHP Vulnerability To Expand Botnets
Default Credentials

According to researchers, Yowai has the same configuration table as like the Mirai variants and additionally adds the ThinkPHP exploit with other vectors.

Yowai carries out communication with command and control server over port 6 to receive commands and once it infects the router, then it launches a dictionary to infect other devices.

All the infected devices then turn to be a part of the botnet and the threat actors use the botnet to launch highly intensive DDoS attacks.

Along with ThinkPHP Vulnerability Yowai exploiting following vulnerabilities that includes CVE-2014-8361, a Linksys RCE, CVE-2018-10561, CCTV-DVR RCE.

Hakai botnet previously targets only IoT devices, in this new campaign it adds a number of including ThinkPHP, D-Link DSL-2750B router vuln, CVE-2015-2051, CVE-2014-8361, and CVE-2017-17215.

Hakai and Yowai can easily be abused by cybercriminals to breach web servers and attack websites, researchers concluded.

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