text code block:sequence by process.entity_id, host.id with maxspan=1s [file where host.os.type == "linux" and event.type == "change" and event.action == "rename" and file.extension : "?*" and process.executable : ("./*", "/tmp/*", "/var/tmp/*", "/dev/shm/*", "/var/run/*", "/boot/*") and file.path : ( "/home/*/Downloads/*", "/home/*/Documents/*", "/root/*", "/bin/*", "/usr/bin/*", "/var/log/*", "/var/lib/log/*", "/var/backup/*", "/var/www/*") and not process.name : ( "dpkg", "yum", "dnf", "rpm", "dockerd", "go", "java", "pip*", "python*", "node", "containerd", "php", "p4d", "conda", "chrome", "imap", "cmake", "firefox", "semanage", "semodule", "ansible-galaxy", "fc-cache", "jammy", "git", "systemsettings", "vmis-launcher", "bundle", "kudu-tserver", "suldownloader", "rustup-init", "bun" ) ] with runs=25 [file where host.os.type == "linux" and event.action == "creation" and file.name : ("*restore*", "*lock*", "*recovery*", "*read*", "*instruction*", "*how_to*", "*ransom*") ]
Install detection rules in Elastic Security
Detect Potential Linux Ransomware Note Creation Detected in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).