Identifies processes executed via Windows Management Instrumentation (WMI) on a remote host. Rather than executing PowerShell functionality with powershell.exe, some attackers do this to operate more stealthily. Identifies the PowerShell engine being invoked by unexpected processes. This is uncommon for legitimate files and sometimes done by adversaries to hide malware.ĭiscovery of remote system information using built-in commands, which may be used to move laterally. Identifies suspicious creation of Alternate Data Streams on highly targeted files. Unusual File Creation - Alternate Data Stream This allows them to maintain unauthorized access, execute additional malicious activities, or evade detection. Malicious actors can leverage systemd service files to achieve persistence by creating or modifying service files to execute malicious commands or payloads during system startup. Systemd service files are configuration files in Linux systems used to define and manage system services. New Systemd Service Created by Previously Unknown Process Similarly to cron/at, systemd timers can be set up to execute on boot time, or on a specific point in time, which allows attackers to regain access in case the connection to the infected asset was lost. ![]() Systemd timers can be used by an attacker to gain persistence, by scheduling the execution of a command or script. By creating or modifying cron job configurations, attackers can execute malicious commands or scripts at predefined intervals, ensuring their continued presence and enabling unauthorized activities.ĭetects the creation of a systemd timer within any of the default systemd timer directories. ![]() Linux cron jobs are scheduled tasks that can be leveraged by malicious actors for persistence, privilege escalation and command execution. ![]() Cron Job Created or Changed by Previously Unknown Process
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