Sigma Rules
1,709 rules found
Delete Important Scheduled Task
Detects when adversaries stop services or processes by deleting their respective scheduled tasks in order to conduct data destructive activities
Delete All Scheduled Tasks
Detects the usage of schtasks with the delete flag and the asterisk symbol to delete all tasks from the schedule of the local computer, including tasks scheduled by other users.
Disable Important Scheduled Task
Detects when adversaries stop services or processes by disabling their respective scheduled tasks in order to conduct data destructive activities
Schtasks From Suspicious Folders
Detects scheduled task creations that have suspicious action command and folder combinations
Uncommon One Time Only Scheduled Task At 00:00
Detects scheduled task creation events that include suspicious actions, and is run once at 00:00
Potential SSH Tunnel Persistence Install Using A Scheduled Task
Detects the creation of new scheduled tasks via commandline, using Schtasks.exe. This rule detects tasks creating that call OpenSSH, which may indicate the creation of reverse SSH tunnel to the attacker's server.
Potential Persistence Via Powershell Search Order Hijacking - Task
Detects suspicious powershell execution via a schedule task where the command ends with an suspicious flags to hide the powershell instance instead of executeing scripts or commands. This could be a sign of persistence via PowerShell "Get-Variable" technique as seen being used in Colibri Loader
Scheduled Task Executing Encoded Payload from Registry
Detects the creation of a schtask that potentially executes a base64 encoded payload stored in the Windows Registry using PowerShell.
Suspicious Schtasks Schedule Types
Detects scheduled task creations or modification on a suspicious schedule type
Suspicious Command Patterns In Scheduled Task Creation
Detects scheduled task creation using "schtasks" that contain potentially suspicious or uncommon commands
Schtasks Creation Or Modification With SYSTEM Privileges
Detects the creation or update of a scheduled task to run with "NT AUTHORITY\SYSTEM" privileges
Scheduled Task Creation Masquerading as System Processes
Detects the creation of scheduled tasks that involve system processes, which may indicate malicious actors masquerading as or abusing these processes to execute payloads or maintain persistence.
Script Event Consumer Spawning Process
Detects a suspicious child process of Script Event Consumer (scrcons.exe).
Possible Privilege Escalation via Weak Service Permissions
Detection of sc.exe utility spawning by user with Medium integrity level to change service ImagePath or FailureCommand
Allow Service Access Using Security Descriptor Tampering Via Sc.EXE
Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to override access restrictions set by previous ACLs.
Deny Service Access Using Security Descriptor Tampering Via Sc.EXE
Detects suspicious DACL modifications to deny access to a service that affects critical trustees. This can be used to hide services or make them unstoppable.
Service DACL Abuse To Hide Services Via Sc.EXE
Detects usage of the "sc.exe" utility adding a new service with special permission seen used by threat actors which makes the service hidden and unremovable.
Suspicious Service Path Modification
Detects service path modification via the "sc" binary to a suspicious command or path
Sdiagnhost Calling Suspicious Child Process
Detects sdiagnhost.exe calling a suspicious child process (e.g. used in exploits for Follina / CVE-2022-30190)
Suspicious Serv-U Process Pattern
Detects a suspicious process pattern which could be a sign of an exploited Serv-U service
Uncommon Child Process Of Setres.EXE
Detects uncommon child process of Setres.EXE. Setres.EXE is a Windows server only process and tool that can be used to set the screen resolution. It can potentially be abused in order to launch any arbitrary file with a name containing the word "choice" from the current execution path.
Suspicious Speech Runtime Binary Child Process
Detects suspicious Speech Runtime Binary Execution by monitoring its child processes. Child processes spawned by SpeechRuntime.exe could indicate an attempt for lateral movement via COM & DCOM hijacking.
Suspicious Splwow64 Without Params
Detects suspicious Splwow64.exe process without any command line parameters
Suspicious Spool Service Child Process
Detects suspicious print spool service (spoolsv.exe) child processes.
VeeamBackup Database Credentials Dump Via Sqlcmd.EXE
Detects dump of credentials in VeeamBackup dbo
SQLite Chromium Profile Data DB Access
Detect usage of the "sqlite" binary to query databases in Chromium-based browsers for potential data stealing.
SQLite Firefox Profile Data DB Access
Detect usage of the "sqlite" binary to query databases in Firefox and other Gecko-based browsers for potential data stealing.
Potential RDP Tunneling Via SSH
Execution of ssh.exe to perform data exfiltration and tunneling through RDP
Execution via stordiag.exe
Detects the use of stordiag.exe to execute schtasks.exe systeminfo.exe and fltmc.exe
Abused Debug Privilege by Arbitrary Parent Processes
Detection of unusual child processes by different system processes
User Added To Highly Privileged Group
Detects addition of users to highly privileged groups via "Net" or "Add-LocalGroupMember".
User Added to Remote Desktop Users Group
Detects addition of users to the local Remote Desktop Users group via "Net" or "Add-LocalGroupMember".
Phishing Pattern ISO in Archive
Detects cases in which an ISO files is opend within an archiver like 7Zip or Winrar, which is a sign of phishing as threat actors put small ISO files in archives as email attachments to bypass certain filters and protective measures (mark of web)
Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Detects attackers using tooling with bad opsec defaults. E.g. spawning a sacrificial process to inject a capability into the process without taking into account how the process is normally run. One trivial example of this is using rundll32.exe without arguments as a sacrificial process (default in CS, now highlighted by c2lint), running WerFault without arguments (Kraken - credit am0nsec), and other examples.
Suspicious Child Process Created as System
Detection of child processes spawned with SYSTEM privileges by parents with LOCAL SERVICE or NETWORK SERVICE accounts
Suspicious ClickFix/FileFix Execution Pattern
Detects suspicious execution patterns where users are tricked into running malicious commands via clipboard manipulation, either through the Windows Run dialog (ClickFix) or File Explorer address bar (FileFix). Attackers leverage social engineering campaigns—such as fake CAPTCHA challenges or urgent alerts—encouraging victims to paste clipboard contents, often executing mshta.exe, powershell.exe, or similar commands to infect systems.
Suspicious Explorer Process with Whitespace Padding - ClickFix/FileFix
Detects process creation with suspicious whitespace padding followed by a '#' character, which may indicate ClickFix or FileFix techniques used to conceal malicious commands from visual inspection. ClickFix and FileFix are social engineering attack techniques where adversaries distribute phishing documents or malicious links that deceive users into opening the Windows Run dialog box or File Explorer search bar. The victims are then instructed to paste commands from their clipboard, which contain extensive whitespace padding using various Unicode space characters to push the actual malicious command far to the right, effectively hiding it from immediate view.
Potential CommandLine Obfuscation Using Unicode Characters From Suspicious Image
Detects potential commandline obfuscation using unicode characters. Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit.
LOL-Binary Copied From System Directory
Detects a suspicious copy operation that tries to copy a known LOLBIN from system (System32, SysWOW64, WinSxS) directories to another on disk in order to bypass detections based on locations.
Potential Crypto Mining Activity
Detects command line parameters or strings often used by crypto miners
Potential Data Exfiltration Activity Via CommandLine Tools
Detects the use of various CLI utilities exfiltrating data via web requests
Raccine Uninstall
Detects commands that indicate a Raccine removal from an end system. Raccine is a free ransomware protection tool.
Suspicious Double Extension File Execution
Detects suspicious use of an .exe extension after a non-executable file extension like .pdf.exe, a set of spaces or underlines to cloak the executable file in spear phishing campaigns
Suspicious Parent Double Extension File Execution
Detect execution of suspicious double extension files in ParentCommandLine
Suspicious Download from Office Domain
Detects suspicious ways to download files from Microsoft domains that are used to store attachments in Emails or OneNote documents
Potential Defense Evasion Activity Via Emoji Usage In CommandLine - 1
Detects the usage of emojis in the command line, this could be a sign of potential defense evasion activity.
Potential Defense Evasion Activity Via Emoji Usage In CommandLine - 2
Detects the usage of emojis in the command line, this could be a sign of potential defense evasion activity.
Potential Defense Evasion Activity Via Emoji Usage In CommandLine - 3
Detects the usage of emojis in the command line, this could be a sign of potential defense evasion activity.