SigmaHQ Detections
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6,797 detections
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Detects the execution of binaries located in potentially suspicious locations, specifically within the '/tmp/' directory, using the 'nohup' command. This behavior is often associated with malware attempting to maintain execution even after a user logs off or a session terminates.
Detects executions of scripts located in potentially suspicious locations such as "/tmp" via a shell such as "bash", "sh", etc. This behavior is often associated with malware or adversaries attempting to execute payloads from temporary or user-writable directories.
This rule detects attempts to enumerate local network configuration on Linux systems. It specifically looks for the execution of common network utilities such as 'firewall-cmd', 'ufw', 'iptables', 'netstat', 'ss', 'ip', 'ifconfig', 'systemd-resolve', and 'route'. Additionally, it triggers if '/etc/resolv.conf' is present in the command line, indicating an attempt to inspect DNS resolver configuration.
Detects attempts to extract credentials from macOS Keychain using the 'security' command-line utility. This rule specifically looks for the use of 'security' with arguments like 'find-certificate', 'export', 'dump-keychain', or 'login-keychain', which are commonly used to access or dump Keychain contents.
Detects the execution of suspicious child processes from macOS installer package parent processes. This includes various scripting interpreters like osascript, JXA, and common network utilities like curl and wget, which can be abused during preinstall or postinstall phases of a package installation.
Detects the usage of tooling to sniff network traffic. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Detects the remote installation of a print driver, which is a possible indication of the exploitation of PrintNightmare (CVE-2021-1675, CVE-2021-34527). The occurrence of print drivers being installed remotely via RPC functions should be rare, as print drivers are normally installed locally or through group policy.
This rule detects suspicious user agent strings commonly associated with cryptocurrency miners (XMRig and CCMiner) in proxy logs. The presence of these user agents indicates that a system on the network might be infected with mining malware and is attempting to communicate with mining pools or command and control servers.
Detects when an attacker calls the "ALTER SERVER AUDIT" or "DROP SERVER AUDIT" transaction in order to delete or disable audit logs on the server. This action is a strong indicator of an adversary attempting to evade detection by tampering with logging mechanisms.
Detects a threat actor creating a file named `iertutil.dll` in the `C:\Program Files\Internet Explorer\` directory over the network for a DCOM InternetExplorer DLL Hijack scenario. This rule specifically looks for EventID 5145 (a network share access event) where the target file path ends with `\Internet Explorer\iertutil.dll` and the `SubjectUserName` does not end with a `$` (indicating a machine account, which is filtered out to reduce false positives).
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