{"id":100066,"date":"2021-04-30T16:23:09","date_gmt":"2021-04-30T14:23:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/rotajakiro-novoe-vredonosnoe-po-dlya-linux-maskiruyushheesya-pod-proczess-systemd"},"modified":"2021-04-30T16:23:09","modified_gmt":"2021-04-30T14:23:09","slug":"rotajakiro-novoe-vredonosnoe-po-dlya-linux-maskiruyushheesya-pod-proczess-systemd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/rotajakiro-novoe-vredonosnoe-po-dlya-linux-maskiruyushheesya-pod-proczess-systemd","title":{"rendered":"RotaJakiro \u2014 ny malware til Linux, der camouflerer sig som systemd-proces","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Forskningslaboratoriet 360 Netlab har rapporteret om opdagelsen af ny malware for Linux, der har f\u00e5et kodename RotaJakiro, som inkluderer implementeringen af en backdoor, der muligg\u00f8r kontrol af systemet. Malware kunne v\u00e6re installeret af angribere efter udnyttelse af uoprettede s\u00e5rbarheder i systemet eller ved at kr\u00e6kke usikre adgangskoder. <\/p>\n

Backdoor blev opdaget under analysen af mist\u00e6nkelig trafik fra en af systemprocesserne, der blev afsl\u00f8ret under analysen af strukturen af botnettet, der blev brugt til DDoS-angreb. Indtil nu var RotaJakiro forblevet uset i tre \u00e5r, herunder de f\u00f8rste fors\u00f8g p\u00e5 at kontrollere filer med MD5-hash, der svarer til den opdagede malware, datert til maj 2018. <\/p>\n

En af RotaJakiros s\u00e6rlige tr\u00e6k er brugen af forskellige maskingteknikker, n\u00e5r den k\u00f8res med relevante brugere og root-rettigheder. For at skjule sin tilstedev\u00e6relse brugte backdoor navne p\u00e5 processerne systemd-daemon, session-dbus og gvfsd-helper, som, i betragtning af den moderne Linux-distributioners overbelastning med forskellige systemprocesser, ved f\u00f8rste \u00f8jekast virkede legitime og ikke vakte mistanke. <\/p>\n

N\u00e5r den k\u00f8res med root-rettigheder, oprettes der scripts \/etc\/init\/systemd-agent.conf og \/lib\/systemd\/system\/sys-temd-agent.service for at aktivere malware, mens selve den ondsindede eksekverbare fil placeres som \/bin\/systemd\/systemd-daemon og \/usr\/lib\/systemd\/systemd-daemon (funktionaliteten blev duplikeret i to filer). N\u00e5r den udf\u00f8res som en almindelig bruger, anvendes autostartfilen $HOME\/.config\/au-tostart\/gnomehelper.desktop, og der foretages \u00e6ndringer i .bashrc, mens den eksekverbare fil er gemt som $HOME\/.gvfsd\/.profile\/gvfsd-helper og $HOME\/.dbus\/sessions\/session-dbus. Begge eksekverbare filer startes samtidigt, og hver af dem overv\u00e5ger tilstedev\u00e6relsen af den anden og genopretter den i tilf\u00e6lde af, at den afsluttes. <\/p>\n

For at skjule resultaterne af sin aktivitet anvendte backdooren flere krypteringsalgoritmer, for eksempel blev AES brugt til at kryptere sine ressourcer, og for at skjule kommunikationskanalen til kontrolsystemet serveren<\/a> en kombination af AES, XOR og ROTATE i kombination med kompression ved hj\u00e6lp af ZLIB. <\/p>\n

For controlling commands, the malware contacted 4 domains through network port 443 (the communication used its own protocol rather than 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 a Kyiv-based provider. hostingudbyder<\/a> Deltahost. The backdoor integrated 12 basic functions that allowed uploading and executing plugins with extended functionality, transmitting device data, intercepting confidential data, and managing local files.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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