Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
40,063 detections
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Detects the use of PowerShell to remove the 'Zone.Identifier' NTFS Alternate Data Stream (ADS) from files. This stream is responsible for the 'Mark-of-the-Web' (MOTW) which triggers security warnings in Windows, including SmartScreen and Protected View. Adversaries use this technique to evade security controls on downloaded malicious files.
Detects malicious PowerShell command chains often used in ClickFix campaigns. These commands typically move zip files from the user's Downloads directory to a temporary folder, extract them using the tar utility, and execute an embedded PowerShell script using conhost in headless mode. This technique is designed to bypass AMSI command-line inspection by offloading the actual payload execution to an extracted, unmonitored script.
Detects network activity associated with the 'ClickFix' social engineering campaign, which commonly targets users with fake error messages to trick them into executing malicious commands. The rule identifies communication with known malicious infrastructure (domains and IP addresses) found in CommonSecurityLog events, while implementing filters to exclude common security scanners and deduplicating per-host alerts.
Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
Detects instances where a single Kerberos logon session (TargetLogonId) is utilized to authenticate from multiple distinct source hosts or IP addresses within a one-hour window. This behavior is inconsistent with normal Kerberos authentication patterns and is a strong indicator of Pass-the-Ticket (PtT) activity, commonly associated with tools like Mimikatz or Rubeus where a stolen ticket is injected into multiple sessions or systems.
Detects attempts to exploit CVE-2021-36934 (HiveNightmare/SeriousSAM) by monitoring for unauthorized access to SAM, SYSTEM, or SECURITY hive files within Volume Shadow Copies, or the use of icacls/vssadmin to facilitate this credential access.
This rule monitors for two indicators of potentially malicious WinRM activity: first, the execution of suspicious child processes (e.g., cmd.exe, powershell.exe, rundll32.exe, certutil.exe) originating from the Windows Remote Management host process (wsmprovhost.exe); and second, a 'fan-out' pattern where a single account establishes WinRM/PSRemoting sessions on three or more distinct hosts within a short time window, which is often indicative of automated lateral movement or credential abuse.
Detects changes to the Access Control List (ACL) of the AdminSDHolder object in Active Directory. AdminSDHolder is a protected object whose ACL is automatically propagated by the SDProp process every 60 minutes to all privileged groups and accounts in the domain. Modifying the ACL on this object allows an adversary to establish a durable, self-healing backdoor by granting persistent access to high-privileged security principals.
Detects the use of MSBuild.exe to compile and execute inline code or tasks. The rule identifies suspicious command-line patterns (such as Task/CodeTaskFactory), execution from non-standard directories (Temp, AppData, Downloads, etc.), and subsequent network or child process activity originating from these MSBuild instances, indicating potential defense evasion or code execution.
Detects the use of MSBuild.exe to compile and execute inline code or tasks. The rule identifies suspicious command-line patterns (such as Task/CodeTaskFactory), execution from non-standard directories (Temp, AppData, Downloads, etc.), and subsequent network or child process activity originating from these MSBuild instances, indicating potential defense evasion or code execution.
Detects the use of MSBuild.exe to compile and execute inline code or tasks. The rule identifies suspicious command-line patterns (such as Task/CodeTaskFactory), execution from non-standard directories (Temp, AppData, Downloads, etc.), and subsequent network or child process activity originating from these MSBuild instances, indicating potential defense evasion or code execution.
Detects the use of the Windows Terminal Services console tool (tscon.exe) to hijack active or disconnected Remote Desktop sessions. Attackers often execute this with SYSTEM privileges, frequently initiated via service control utilities like sc.exe, schtasks.exe, or services.exe, to gain unauthorized access to user sessions without requiring credentials.
Detects the execution of control.exe or rundll32.exe with command line arguments pointing to .cpl files located in non-standard, user-writable directories such as Temp, AppData, Downloads, or Users/Public. This is a common technique used by adversaries to proxy execution of malicious payloads while bypassing standard path restrictions.
Detects execution of the Microsoft .NET utility InstallUtil.exe with command-line arguments typically used to execute arbitrary code or bypass application whitelisting. The rule monitors for common bypass switches such as /logfile, /LogToConsole=false, or /U, while filtering out executions from standard Windows directories to identify potential malicious usage of this signed binary proxy.
Detects the execution of Regsvcs.exe or Regasm.exe, which are trusted Windows .NET binaries, from non-standard or user-writable directories (such as Temp, AppData, Downloads, or User profiles). Adversaries often abuse these binaries to proxy the execution of arbitrary malicious code (DLLs) by bypassing application control policies.
Detects the use of sdbinst.exe to install a shim database (.sdb) file from non-standard, user-writable directories (such as Temp, AppData, Downloads, Users Public, or ProgramData). Adversaries use application shimming to achieve persistence or privilege escalation, and custom shims are typically expected to reside in system-protected AppPatch directories.
Detects unauthorized access or decryption attempts related to Group Policy Preferences (GPP) files stored in SYSVOL. Adversaries often target these XML files to extract embedded 'cpassword' attributes, which can be decrypted using publicly known keys to obtain plain-text administrative credentials.
Detects outbound network connections to known Tor SOCKS (9050, 9150) or OR (9001, 9051) ports initiated by processes other than standard, authorized Tor client binaries. This is indicative of potential C2 traffic obfuscation or unauthorized use of the Tor network within the environment.
Detects network connection attempts to known malicious infrastructure, specifically targeting suspicious domains and an IP address associated with command and control (C2) activity. The rule monitors endpoint network events for communication with specified malicious URLs or a hardcoded IP.
Detects network connections or DNS queries to known suspicious domains associated with command and control infrastructure.
Detects network connections or DNS queries to known suspicious domains associated with command and control infrastructure.
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