diff --git a/rules/windows/command_and_control_rmm_after_msi_install.toml b/rules/windows/command_and_control_rmm_after_msi_install.toml index dcbd5ddb2..569732117 100644 --- a/rules/windows/command_and_control_rmm_after_msi_install.toml +++ b/rules/windows/command_and_control_rmm_after_msi_install.toml @@ -2,7 +2,7 @@ creation_date = "2026/03/18" integration = ["endpoint", "windows", "sentinel_one_cloud_funnel", "m365_defender", "system", "crowdstrike"] maturity = "production" -updated_date = "2026/03/18" +updated_date = "2026/03/30" [rule] author = ["Elastic"] @@ -69,14 +69,14 @@ type = "eql" query = ''' sequence by host.id with maxspan=1m - [process where host.os.type == "windows" and event.type == "start" and process.name : "msiexec.exe" and process.args : ("/i*", "-i*")] + [process where host.os.type == "windows" and event.type == "start" and process.name : "msiexec.exe" and + process.args : ("/i*", "-i*") and process.parent.name : ("explorer.exe", "sihost.exe")] [process where host.os.type == "windows" and event.type == "start" and ( (process.name : "ScreenConnect.ClientService.exe" and process.command_line : "*?e=Access&y=Guest&h*&k=*") or (process.name : "Syncro.Installer.exe" and process.args : "--config-json" and process.args : "--key") or process.name : ("tvnserver.exe", "winvnc.exe") - ) - ] + )] ''' [[rule.threat]]