Sigma Rules
224 rules found
Enable Remote Connection Between Anonymous Computer - AllowAnonymousCallback
Detects enabling of the "AllowAnonymousCallback" registry value, which allows a remote connection between computers that do not have a trust relationship.
Registry Persistence via Service in Safe Mode
Detects the modification of the registry to allow a driver or service to persist in Safe Mode.
Add Port Monitor Persistence in Registry
Adversaries may use port monitors to run an attacker supplied DLL during system boot for persistence or privilege escalation. A port monitor can be set through the AddMonitor API call to set a DLL to be loaded at startup.
Add Debugger Entry To AeDebug For Persistence
Detects when an attacker adds a new "Debugger" value to the "AeDebug" key in order to achieve persistence which will get invoked when an application crashes
Allow RDP Remote Assistance Feature
Detect enable rdp feature to allow specific user to rdp connect on the targeted machine
Potential AMSI COM Server Hijacking
Detects changes to the AMSI come server registry key in order disable AMSI scanning functionalities. When AMSI attempts to starts its COM component, it will query its registered CLSID and return a non-existent COM server. This causes a load failure and prevents any scanning methods from being accessed, ultimately rendering AMSI useless
AMSI Disabled via Registry Modification
Detects attempts to disable AMSI (Anti-Malware Scan Interface) by modifying the AmsiEnable registry value. Anti-Malware Scan Interface (AMSI) is a security feature in Windows that allows applications and services to integrate with anti-malware products for enhanced protection against malicious content. Adversaries may attempt to disable AMSI to evade detection by security software, allowing them to execute malicious scripts or code without being scanned.
Classes Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Common Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
CurrentControlSet Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
CurrentVersion Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
CurrentVersion NT Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Internet Explorer Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Office Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Session Manager Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
System Scripts Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
WinSock2 Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Wow6432Node CurrentVersion Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Wow6432Node Classes Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Wow6432Node Windows NT CurrentVersion Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
New BgInfo.EXE Custom DB Path Registry Configuration
Detects setting of a new registry database value related to BgInfo configuration. Attackers can for example set this value to save the results of the commands executed by BgInfo in order to exfiltrate information.
New BgInfo.EXE Custom VBScript Registry Configuration
Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom VBScript via "BgInfo.exe"
New BgInfo.EXE Custom WMI Query Registry Configuration
Detects setting of a new registry value related to BgInfo configuration, which can be abused to execute custom WMI query via "BgInfo.exe"
Bypass UAC Using DelegateExecute
Bypasses User Account Control using a fileless method
Bypass UAC Using Event Viewer
Bypasses User Account Control using Event Viewer and a relevant Windows Registry modification
Bypass UAC Using SilentCleanup Task
Detects the setting of the environement variable "windir" to a non default value. Attackers often abuse this variable in order to trigger a UAC bypass via the "SilentCleanup" task. The SilentCleanup task located in %windir%\system32\cleanmgr.exe is an auto-elevated task that can be abused to elevate any file with administrator privileges without prompting UAC.
Default RDP Port Changed to Non Standard Port
Detects changes to the default RDP port. Remote desktop is a common feature in operating systems. It allows a user to log into a remote system using an interactive session with a graphical user interface. Microsoft refers to its implementation of the Remote Desktop Protocol (RDP) as Remote Desktop Services (RDS).
IE Change Domain Zone
Hides the file extension through modification of the registry
Sysmon Driver Altitude Change
Detects changes in Sysmon driver altitude value. If the Sysmon driver is configured to load at an altitude of another registered service, it will fail to load at boot.
Change Winevt Channel Access Permission Via Registry
Detects tampering with the "ChannelAccess" registry key in order to change access to Windows event channel.
Running Chrome VPN Extensions via the Registry 2 VPN Extension
Running Chrome VPN Extensions via the Registry install 2 vpn extension
ClickOnce Trust Prompt Tampering
Detects changes to the ClickOnce trust prompt registry key in order to enable an installation from different locations such as the Internet.
Potential CobaltStrike Service Installations - Registry
Detects known malicious service installs that appear in cases in which a Cobalt Strike beacon elevates privileges or lateral movement.
COM Hijack via Sdclt
Detects changes to 'HKCU\Software\Classes\Folder\shell\open\command\DelegateExecute'
CrashControl CrashDump Disabled
Detects disabling the CrashDump per registry (as used by HermeticWiper)
Security Event Logging Disabled via MiniNt Registry Key - Registry Set
Detects the addition of the 'MiniNt' key to the registry. Upon a reboot, Windows Event Log service will stop writing events. Windows Event Log is a service that collects and stores event logs from the operating system and applications. It is an important component of Windows security and auditing. Adversary may want to disable this service to disable logging of security events which could be used to detect their activities.
Service Binary in Suspicious Folder
Detect the creation of a service with a service binary located in a suspicious directory
Windows Credential Guard Disabled - Registry
Detects attempts to disable Windows Credential Guard by setting registry values to 0. Credential Guard uses virtualization-based security to isolate secrets so that only privileged system software can access them. Adversaries may disable Credential Guard to gain access to sensitive credentials stored in the system, such as NTLM hashes and Kerberos tickets, which can be used for lateral movement and privilege escalation.
Custom File Open Handler Executes PowerShell
Detects the abuse of custom file open handler, executing powershell
Potential Registry Persistence Attempt Via DbgManagedDebugger
Detects the addition of the "Debugger" value to the "DbgManagedDebugger" key in order to achieve persistence. Which will get invoked when an application crashes
Windows Defender Exclusions Added - Registry
Detects the Setting of Windows Defender Exclusions
Potentially Suspicious Desktop Background Change Via Registry
Detects registry value settings that would replace the user's desktop background. This is a common technique used by malware to change the desktop background to a ransom note or other image.
Antivirus Filter Driver Disallowed On Dev Drive - Registry
Detects activity that indicates a user disabling the ability for Antivirus mini filter to inspect a "Dev Drive".
Windows Hypervisor Enforced Code Integrity Disabled
Detects changes to the HypervisorEnforcedCodeIntegrity registry key and the "Enabled" value being set to 0 in order to disable the Hypervisor Enforced Code Integrity feature. This allows an attacker to load unsigned and untrusted code to be run in the kernel
Hypervisor Enforced Paging Translation Disabled
Detects changes to the "DisableHypervisorEnforcedPagingTranslation" registry value. Where the it is set to "1" in order to disable the Hypervisor Enforced Paging Translation feature.
DHCP Callout DLL Installation
Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, which can be used to execute code in context of the DHCP server (restart required)
Disable Exploit Guard Network Protection on Windows Defender
Detects disabling Windows Defender Exploit Guard Network Protection
Disabled Windows Defender Eventlog
Detects the disabling of the Windows Defender eventlog as seen in relation to Lockbit 3.0 infections