Sigma Rules
1,619 rules found
Suspicious Registry Modification From ADS Via Regini.EXE
Detects the import of an alternate data stream with regini.exe, regini.exe can be used to modify registry keys.
Registry Modification Via Regini.EXE
Detects the execution of regini.exe which can be used to modify registry keys, the changes are imported from one or more text files.
DLL Execution Via Register-cimprovider.exe
Detects using register-cimprovider.exe to execute arbitrary dll file.
Enumeration for 3rd Party Creds From CLI
Detects processes that query known 3rd party registry keys that holds credentials via commandline
Registry Export of Third-Party Credentials
Detects the use of reg.exe to export registry paths associated with third-party credentials. Credential stealers have been known to use this technique to extract sensitive information from the registry.
IE ZoneMap Setting Downgraded To MyComputer Zone For HTTP Protocols Via CLI
Detects changes to Internet Explorer's (IE / Windows Internet properties) ZoneMap configuration of the "HTTP" and "HTTPS" protocols to point to the "My Computer" zone. This allows downloaded files from the Internet to be granted the same level of trust as files stored locally.
Suspicious Debugger Registration Cmdline
Detects the registration of a debugger for a program that is available in the logon screen (sticky key backdoor).
Potential Persistence Via Logon Scripts - CommandLine
Detects the addition of a new LogonScript to the registry value "UserInitMprLogonScript" for potential persistence
Potential Credential Dumping Attempt Using New NetworkProvider - CLI
Detects when an attacker tries to add a new network provider in order to dump clear text credentials, similar to how the NPPSpy tool does it
Python Function Execution Security Warning Disabled In Excel
Detects changes to the registry value "PythonFunctionWarnings" that would prevent any warnings or alerts from showing when Python functions are about to be executed. Threat actors could run malicious code through the new Microsoft Excel feature that allows Python to run within the spreadsheet.
Potential Privilege Escalation via Service Permissions Weakness
Detect modification of services configuration (ImagePath, FailureCommand and ServiceDLL) in registry by processes with Medium integrity level
Potential Provisioning Registry Key Abuse For Binary Proxy Execution
Detects potential abuse of the provisioning registry key for indirect command execution through "Provlaunch.exe".
Potential PowerShell Execution Policy Tampering - ProcCreation
Detects changes to the PowerShell execution policy registry key in order to bypass signing requirements for script execution from the CommandLine
Hiding User Account Via SpecialAccounts Registry Key - CommandLine
Detects changes to the registry key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\Userlist" where the value is set to "0" in order to hide user account from being listed on the logon screen.
Persistence Via TypedPaths - CommandLine
Detects modification addition to the 'TypedPaths' key in the user or admin registry via the commandline. Which might indicate persistence attempt
Potential Regsvr32 Commandline Flag Anomaly
Detects a potential command line flag anomaly related to "regsvr32" in which the "/i" flag is used without the "/n" which should be uncommon.
Potentially Suspicious Regsvr32 HTTP IP Pattern
Detects regsvr32 execution to download and install DLLs located remotely where the address is an IP address.
Potentially Suspicious Regsvr32 HTTP/FTP Pattern
Detects regsvr32 execution to download/install/register new DLLs that are hosted on Web or FTP servers.
Suspicious Regsvr32 Execution From Remote Share
Detects REGSVR32.exe to execute DLL hosted on remote shares
Potentially Suspicious Child Process Of Regsvr32
Detects potentially suspicious child processes of "regsvr32.exe".
Regsvr32 Execution From Potential Suspicious Location
Detects execution of regsvr32 where the DLL is located in a potentially suspicious location.
Regsvr32 Execution From Highly Suspicious Location
Detects execution of regsvr32 where the DLL is located in a highly suspicious locations
Regsvr32 DLL Execution With Suspicious File Extension
Detects the execution of REGSVR32.exe with DLL files masquerading as other files
Scripting/CommandLine Process Spawned Regsvr32
Detects various command line and scripting engines/processes such as "PowerShell", "Wscript", "Cmd", etc. spawning a "regsvr32" instance.
Regsvr32 DLL Execution With Uncommon Extension
Detects a "regsvr32" execution where the DLL doesn't contain a common file extension.
Potential Persistence Attempt Via Run Keys Using Reg.EXE
Detects suspicious command line reg.exe tool adding key to RUN key in Registry
Add SafeBoot Keys Via Reg Utility
Detects execution of "reg.exe" commands with the "add" or "copy" flags on safe boot registry keys. Often used by attacker to allow the ransomware to work in safe mode as some security products do not
Suspicious Reg Add BitLocker
Detects suspicious addition to BitLocker related registry keys via the reg.exe utility
Dropping Of Password Filter DLL
Detects dropping of dll files in system32 that may be used to retrieve user credentials from LSASS
Suspicious Windows Defender Folder Exclusion Added Via Reg.EXE
Detects the usage of "reg.exe" to add Defender folder exclusions. Qbot has been seen using this technique to add exclusions for folders within AppData and ProgramData.
RunMRU Registry Key Deletion
Detects deletion of the RunMRU registry key, which stores the history of commands executed via the Run dialog. In the clickfix techniques, the phishing lures instruct users to open a run dialog through (Win + R) and execute malicious commands. Adversaries may delete this key to cover their tracks after executing commands.
SafeBoot Registry Key Deleted Via Reg.EXE
Detects execution of "reg.exe" commands with the "delete" flag on safe boot registry keys. Often used by attacker to prevent safeboot execution of security products
Service Registry Key Deleted Via Reg.EXE
Detects execution of "reg.exe" commands with the "delete" flag on services registry key. Often used by attacker to remove AV software services
Potentially Suspicious Desktop Background Change Using Reg.EXE
Detects the execution of "reg.exe" to alter registry keys 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.
Direct Autorun Keys Modification
Detects direct modification of autostart extensibility point (ASEP) in registry using reg.exe.
Disabling Windows Defender WMI Autologger Session via Reg.exe
Detects the use of reg.exe to disable the Event Tracing for Windows (ETW) Autologger session for Windows Defender API and Audit events. By setting the 'Start' value to '0' for the 'DefenderApiLogger' or 'DefenderAuditLogger' session, an attacker can prevent these critical security events from being logged, effectively blinding monitoring tools that rely on this data. This is a powerful defense evasion technique.
Security Service Disabled Via Reg.EXE
Detects execution of "reg.exe" to disable security services such as Windows Defender.
Dumping of Sensitive Hives Via Reg.EXE
Detects the usage of "reg.exe" in order to dump sensitive registry hives. This includes SAM, SYSTEM and SECURITY hives.
Windows Recall Feature Enabled Via Reg.EXE
Detects the enabling of the Windows Recall feature via registry manipulation. Windows Recall can be enabled by deleting the existing "DisableAIDataAnalysis" value, or setting it to 0. Adversaries may enable Windows Recall as part of post-exploitation discovery and collection activities. This rule assumes that Recall is already explicitly disabled on the host, and subsequently enabled by the adversary.
Enumeration for Credentials in Registry
Adversaries may search the Registry on compromised systems for insecurely stored credentials. The Windows Registry stores configuration information that can be used by the system or other programs. Adversaries may query the Registry looking for credentials and passwords that have been stored for use by other programs or services
Potential Suspicious Registry File Imported Via Reg.EXE
Detects the import of '.reg' files from suspicious paths using the 'reg.exe' utility
RestrictedAdminMode Registry Value Tampering - ProcCreation
Detects changes to the "DisableRestrictedAdmin" registry value in order to disable or enable RestrictedAdmin mode. RestrictedAdmin mode prevents the transmission of reusable credentials to the remote system to which you connect using Remote Desktop. This prevents your credentials from being harvested during the initial connection process if the remote server has been compromise
Suspicious Query of MachineGUID
Use of reg to get MachineGuid information
Modify Group Policy Settings
Detect malicious GPO modifications can be used to implement many other malicious behaviors.
Enable LM Hash Storage - ProcCreation
Detects changes to the "NoLMHash" registry value in order to allow Windows to store LM Hashes. By setting this registry value to "0" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.
Potential Configuration And Service Reconnaissance Via Reg.EXE
Detects the usage of "reg.exe" in order to query reconnaissance information from the registry. Adversaries may interact with the Windows registry to gather information about credentials, the system, configuration, and installed software.
Potential Tampering With RDP Related Registry Keys Via Reg.EXE
Detects the execution of "reg.exe" for enabling/disabling the RDP service on the host by tampering with the 'CurrentControlSet\Control\Terminal Server' values
Suspicious ScreenSave Change by Reg.exe
Adversaries may establish persistence by executing malicious content triggered by user inactivity. Screensavers are programs that execute after a configurable time of user inactivity and consist of Portable Executable (PE) files with a .scr file extension