This is a follow-up analysis to a previous blog about a zero day exploit where the FortiGuard Incident Response (FGIR) team examined how remote attackers exploited multiple vulnerabilities in an appliance to gain control of a customer’s system.
At the end of that blog, Fortinet researchers revealed that the remote attacker had deployed a rootkit (a loadable kernel module, sysinitd.ko) and a user-space binary file (sysinitd) on the affected system by executing a shell script (Install.sh). Additionally, to establish rootkit persistence, entries for the rootkit malware were added in the /etc/rc.local and /etc/rc.d/rc.local files so the rootkit malware is loaded during system startup.
Read more…
Source: Fortinet
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