The 360 Netlab research laboratory reported the discovery of new malware for Linux, codenamed RotaJakiro, which includes a backdoor implementation that allows control over the system. The malware could have been installed by attackers after exploiting unpatched vulnerabilities in the system or by guessing weak passwords. <\/p>\n
The backdoor was discovered during an analysis of suspicious traffic from one of the system processes identified while dissecting the structure of the botnet used for DDoS attacks. Until now, RotaJakiro had gone unnoticed for three years, with the first attempts to check files with MD5 hashes matching the identified malware dating back to May 2018 on the VirusTotal service. <\/p>\n
Among the features of RotaJakiro is the use of various obfuscation techniques when running as a non-privileged user and root. To hide its presence, the backdoor used process names like systemd-daemon, session-dbus, and gvfsd-helper, which, considering the congestion of modern Linux distributions with various service processes, appeared legitimate and did not raise suspicion. <\/p>\n
When run with root privileges, scripts \/etc\/init\/systemd-agent.conf and \/lib\/systemd\/system\/sys-temd-agent.service were created, while the malicious executable was placed as \/bin\/systemd\/systemd-daemon and \/usr\/lib\/systemd\/systemd-daemon (functionality was duplicated in both files). When executed with regular user privileges, the autostart file $HOME\/.config\/autostart\/gnomehelper.desktop was used, changes were made to .bashrc, and the executable was saved as $HOME\/.gvfsd\/.profile\/gvfsd-helper and $HOME\/.dbus\/sessions\/session-dbus. Both executable files were launched simultaneously, with each one monitoring the presence of the other and restoring it if it was terminated. <\/p>\n
To hide the results of its activities, the backdoor employed several encryption algorithms. For instance, AES was used to encrypt its resources, and to conceal the communication channel with the controller. proxy server<\/a> The combination of AES, XOR, and ROTATE, along with compression via ZLIB. <\/p>\n To execute control commands, the malware connected to 4 domains via network port 443 (a custom protocol was used in the communication channel instead of HTTPS and TLS). The domains (cdn.mirror-codes.net, status.sublineover.net, blog.eduelects.com, and news.thaprior.net) were registered in 2015 and hosted by Kyiv's Deltahost. of the hosting provider<\/a> The backdoor integrated 12 basic functions that allowed loading and executing plugins with enhanced functionality, transmitting device data, intercepting confidential information, and managing local files. \u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0430\u044f \u043b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u0438\u044f 360 Netlab \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0433\u043e \u041f\u041e \u0434\u043b\u044f Linux, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u0433\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f RotaJakiro \u0438 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-100066","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47RotaJakiro \u2014 new Linux malware masquerading as the systemd process | ProHoster","description":"The 360 Netlab research lab reported the discovery of new Linux malware, codenamed RotaJakiro, which includes a backdoor implementation allowing system 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ProHoster","og:description":"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0430\u044f \u043b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u0438\u044f 360 Netlab \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u0440\u0435\u0434\u043e\u043d\u043e\u0441\u043d\u043e\u0433\u043e \u041f\u041e \u0434\u043b\u044f Linux, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u0433\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f RotaJakiro \u0438 \u0432\u043a\u043b\u044e\u0447\u0430\u044e\u0449\u0435\u0433\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0431\u044d\u043a\u0434\u043e\u0440\u0430, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u0442\u044c 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Source: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"