Every published rule
Every rule shows the reporting behind it, the telemetry it needs and where it falls short — before it costs you anything.
330 rules
Windows Process Creation: Suspicious Network Configuration and Discovery Commands
Alerts on Windows command-line usage of network configuration and discovery tools (ipconfig, netsh, arp, nbtstat, net config, route print).
sigmaWindowslow2021-12-07Windows netsh.exe Firewall Configuration Discovery (show firewall rule/state/name=all)
Flags netsh.exe commands used to enumerate Windows firewall rules and states via “show firewall … name=all”.
sigmaWindowslow2021-12-07Windows: Network connections initiated to api.mega.co.nz or mega.nz
Identifies initiated Windows outbound connections to api.mega.co.nz/mega.nz for potential file-transfer staging.
sigmaWindowslow2021-12-06Windows sc.exe Service Query Execution via Process Creation
Flags sc.exe executions with command lines containing " query", consistent with Windows service information discovery.
sigmalow2021-12-06Linux auditd: getcap scanning for setuid/setgid-capable files under root
Flags getcap command-line usage scanning / for Linux capability-bearing files via auditd.
sigmaLinuxlow2021-11-28macOS: Process commands with trailing space in filename to evade matching
Alerts on macOS processes whose command line and image path end with a trailing space, a common filename masquerading trick.
sigmamacOSlow2021-11-20Windows AD CS Certificate Template Updated/Created Enrollee Supplies Subject Flag
Alerts when AD CS certificate templates are created or updated with CT_FLAG_ENROLLEE_SUPPLIES_SUBJECT.
sigmaWindowslow2021-11-17Linux dd Command Overwrite or Deletion via of= and input redirection
Flags Linux dd executions that use of= with /dev/zero or /dev/null, consistent with file overwrite or deletion attempts.
sigmaLinuxlow2021-10-15Linux Clipboard Data Collection via xclip -sel clip -o
Alerts on Linux processes running xclip to output clipboard content using -sel clip -o.
sigmaLinuxlow2021-10-15Linux Cron Directory File Creation via File Events
Flags new Linux cron-related files created under standard cron directories, excluding a few known benign paths.
sigmaLinuxlow2021-10-15OneLogin: Detect API user account lock or suspension events
Flags OneLogin API events indicating a user account was locked or suspended.
sigmaIdentitylow2021-10-12OneLogin: User Assumes Another Account via Event Type 3
Alerts on OneLogin events indicating a user assumed another user account via event_type_id 3.
sigmaIdentitylow2021-10-12AWS Glue Dev Endpoint Lifecycle Events (Create/Update/Delete) via CloudTrail
Flags Glue Create/Update/DeleteDevEndpoint API activity in CloudTrail that may indicate suspicious development endpoint management.
sigmaCloudlow2021-10-03Linux xclip Clipboard Image Collection via Image MIME Types
Flags xclip usage that outputs image/* data from the clipboard on Linux.
sigmaLinuxlow2021-10-01Clipboard Data Collection via xclip (auditd Linux EXECVE)
Alerts on xclip command lines that request clipboard/clip selection output (-o) on Linux systems monitored by auditd.
sigmaLinuxlow2021-09-24AWS CloudTrail: Lambda Function Updated with New Layer Attached
Flags CloudTrail UpdateFunctionConfiguration calls that attach Lambda layers to an existing function.
sigmaCloudlow2021-09-23Linux Import Tool Image Capture via execve with -window root and .png/.jpg output
Flags Linux ImageMagick import executions likely used for desktop screenshot capture to PNG/JPG outputs or root window.
sigmaLinuxlow2021-09-21Linux screen capture using xwd saving a .xwd file
Flags xwd screen capture executions that write captured output to a .xwd file on Linux.
sigmaLinuxlow2021-09-13Okta Policy Lifecycle Updated or Deleted
Flags Okta events indicating a policy was updated or deleted.
sigmaIdentitylow2021-09-12Linux steghide steganography: Extract hidden files from JPG/PNG
Detects steghide extracting embedded data from image files (.jpg/.png) on Linux.
sigmaLinuxlow2021-09-11