SigmaHQ Detections
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6,797 detections
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Detects when multi-factor authentication (MFA) is disabled in Google Workspace. This could indicate an adversary attempting to weaken security controls for persistent access or to facilitate further compromise.
Detects when Microsoft Cloud App Security reports that users were active from an IP address identified as risky by Microsoft Threat Intelligence. These IP addresses are associated with malicious activities, such as Botnet Command and Control, and may indicate a compromised account.
This rule detects the execution of the 'split' command on Linux systems. The 'split' command is used to break a file into smaller pieces, which can be a technique used by adversaries to bypass data transfer size limits during exfiltration or to make files easier to transfer.
Detects the presence of "bpf_probe_write_user" BPF helper-generated warning messages. Which could be a sign of suspicious eBPF activity on the system.
Detects a bash process initiating an outbound network connection to a remote IP address, which is a common indicator of a reverse shell. This rule specifically looks for '/bin/bash' processes making network connections, excluding connections to localhost or unspecified addresses.
This rule detects the execution of the `nohup` command on Linux systems. `nohup` is a utility that allows a command to continue running in the background even after the user logs out or the terminal is closed. Attackers may leverage `nohup` to maintain persistence for malicious processes or to bypass restrictions in certain environments.
This rule detects attempts to collect data from the clipboard on macOS systems by executing the 'osascript' binary with arguments that indicate clipboard interaction. Specifically, it looks for command lines containing 'osascript', ' -e ', and 'clipboard'. This combination suggests an AppleScript or JavaScript for Automation (JXA) command being executed to access clipboard contents.
This rule detects the execution of 'osacompile' with the '-x' and '-e' flags, which indicates the compilation of a run-only AppleScript. Run-only AppleScripts are compiled scripts that cannot be easily decompiled or inspected, making them a potential method for adversaries to obfuscate malicious code and evade analysis. The '-x' flag compiles the script as execute-only, and '-e' specifies the script source.
Detects when the 'firmwarepasswd' utility is executed on macOS with commands to set, delete, or check the firmware password. This activity can indicate an attempt to manipulate the system's firmware security settings, potentially for malicious purposes such as preventing unauthorized OS installations or recovery, or to lock out legitimate users. The rule notes that this command is disabled on Apple Silicon-based Macs.
Detects Server-Side Template Injection (SSTI) attempts made via GET requests. The rule looks for common SSTI payload strings within the request, specifically excluding requests that result in a 404 Not Found status code to reduce false positives.
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