Sigma Rules
2,839 rules found
Microsoft Office DLL Sideload
Detects DLL sideloading of DLLs that are part of Microsoft Office from non standard location
Potential Python DLL SideLoading
Detects potential DLL sideloading of Python DLL files.
Potential Rcdll.DLL Sideloading
Detects potential DLL sideloading of rcdll.dll
Potential RjvPlatform.DLL Sideloading From Default Location
Detects loading of "RjvPlatform.dll" by the "SystemResetPlatform.exe" binary which can be abused as a method of DLL side loading since the "$SysReset" directory isn't created by default.
Potential RjvPlatform.DLL Sideloading From Non-Default Location
Detects potential DLL sideloading of "RjvPlatform.dll" by "SystemResetPlatform.exe" located in a non-default location.
Potential RoboForm.DLL Sideloading
Detects potential DLL sideloading of "roboform.dll", a DLL used by RoboForm Password Manager
Potential ShellDispatch.DLL Sideloading
Detects potential DLL sideloading of "ShellDispatch.dll"
DLL Sideloading Of ShellChromeAPI.DLL
Detects processes loading the non-existent DLL "ShellChromeAPI". One known example is the "DeviceEnroller" binary in combination with the "PhoneDeepLink" flag tries to load this DLL. Adversaries can drop their own renamed DLL and execute it via DeviceEnroller.exe using this parameter
Potential SmadHook.DLL Sideloading
Detects potential DLL sideloading of "SmadHook.dll", a DLL used by SmadAV antivirus
Potential SolidPDFCreator.DLL Sideloading
Detects potential DLL sideloading of "SolidPDFCreator.dll"
Third Party Software DLL Sideloading
Detects DLL sideloading of DLLs that are part of third party software (zoom, discord....etc)
Fax Service DLL Search Order Hijack
The Fax service attempts to load ualapi.dll, which is non-existent. An attacker can then (side)load their own malicious DLL using this service.
Potential Vcruntime140 DLL Sideloading
Detects potential DLL sideloading of vcruntime140.dll, a common C++ runtime library. Threat actors have been observed using DLL sideloading techniques to load malicious payloads under the guise of legitimate applications such as SqlWriter, SqlDumper etc. Notably, APT29 has been documented leveraging WinELOADER to sideload vcruntime140.dll for executing malicious code.
Potential Vivaldi_elf.DLL Sideloading
Detects potential DLL sideloading of "vivaldi_elf.dll"
VMGuestLib DLL Sideload
Detects DLL sideloading of VMGuestLib.dll by the WmiApSrv service.
VMMap Signed Dbghelp.DLL Potential Sideloading
Detects potential DLL sideloading of a signed dbghelp.dll by the Sysinternals VMMap.
VMMap Unsigned Dbghelp.DLL Potential Sideloading
Detects potential DLL sideloading of an unsigned dbghelp.dll by the Sysinternals VMMap.
Potential DLL Sideloading Via VMware Xfer
Detects loading of a DLL by the VMware Xfer utility from the non-default directory which may be an attempt to sideload arbitrary DLL
Potential Waveedit.DLL Sideloading
Detects potential DLL sideloading of "waveedit.dll", which is part of the Nero WaveEditor audio editing software.
Potential Wazuh Security Platform DLL Sideloading
Detects potential DLL side loading of DLLs that are part of the Wazuh security platform
Potential Mpclient.DLL Sideloading
Detects potential sideloading of "mpclient.dll" by Windows Defender processes ("MpCmdRun" and "NisSrv") from their non-default directory.
Potential WWlib.DLL Sideloading
Detects potential DLL sideloading of "wwlib.dll"
BaaUpdate.exe Suspicious DLL Load
Detects BitLocker Access Agent Update Utility (baaupdate.exe) loading DLLs from suspicious locations that are publicly writable which could indicate an attempt to lateral movement via BitLocker DCOM & COM Hijacking. This technique abuses COM Classes configured as INTERACTIVE USER to spawn processes in the context of the logged-on user's session. Specifically, it targets the BDEUILauncher Class (CLSID ab93b6f1-be76-4185-a488-a9001b105b94) which can launch BaaUpdate.exe, which is vulnerable to COM Hijacking when started with input parameters. This allows attackers to execute code in the user's context without needing to steal credentials or use additional techniques to compromise the account.
Unsigned Module Loaded by ClickOnce Application
Detects unsigned module load by ClickOnce application.
DLL Load By System Process From Suspicious Locations
Detects when a system process (i.e. located in system32, syswow64, etc.) loads a DLL from a suspicious location or a location with permissive permissions such as "C:\Users\Public"
Python Image Load By Non-Python Process
Detects the image load of "Python Core" by a non-Python process. This might be indicative of a execution of executable that has been bundled from Python code. Various tools like Py2Exe, PyInstaller, and cx_Freeze are used to bundle Python code into standalone executables. Threat actors often use these tools to bundle malicious Python scripts into executables, sometimes to obfuscate the code or to bypass security measures.
DotNet CLR DLL Loaded By Scripting Applications
Detects .NET CLR DLLs being loaded by scripting applications such as wscript or cscript. This could be an indication of potential suspicious execution.
Unsigned DLL Loaded by Windows Utility
Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy execution of malicious code.
Suspicious Unsigned Thor Scanner Execution
Detects loading and execution of an unsigned thor scanner binary.
UAC Bypass Using Iscsicpl - ImageLoad
Detects the "iscsicpl.exe" UAC bypass technique that leverages a DLL Search Order hijacking technique to load a custom DLL's from temp or a any user controlled location in the users %PATH%
UAC Bypass With Fake DLL
Attempts to load dismcore.dll after dropping it
MMC Loading Script Engines DLLs
Detects when the Microsoft Management Console (MMC) loads the DLL libraries like vbscript, jscript etc which might indicate an attempt to execute malicious scripts within a trusted system process for bypassing application whitelisting or defense evasion.
Suspicious Loading of Dbgcore/Dbghelp DLLs from Uncommon Location
Detects loading of dbgcore.dll or dbghelp.dll from uncommon locations such as user directories. These DLLs contain the MiniDumpWriteDump function, which can be abused for credential dumping purposes or in some cases for evading EDR/AV detection by suspending processes.
Trusted Path Bypass via Windows Directory Spoofing
Detects DLLs loading from a spoofed Windows directory path with an extra space (e.g "C:\Windows \System32") which can bypass Windows trusted path verification. This technique tricks Windows into treating the path as trusted, allowing malicious DLLs to load with high integrity privileges bypassing UAC.
WMIC Loading Scripting Libraries
Detects threat actors proxy executing code and bypassing application controls by leveraging wmic and the `/FORMAT` argument switch to download and execute an XSL file (i.e js, vbs, etc). It could be an indicator of SquiblyTwo technique, which uses Windows Management Instrumentation (WMI) to execute malicious code.
Wmiprvse Wbemcomn DLL Hijack
Detects a threat actor creating a file named `wbemcomn.dll` in the `C:\Windows\System32\wbem\` directory over the network and loading it for a WMI DLL Hijack scenario.
WMI Persistence - Command Line Event Consumer
Detects WMI command line event consumers
Suspicious WSMAN Provider Image Loads
Detects signs of potential use of the WSMAN provider from uncommon processes locally and remote execution.
Network Connection Initiated By AddinUtil.EXE
Detects a network connection initiated by the Add-In deployment cache updating utility "AddInutil.exe". This could indicate a potential command and control communication as this tool doesn't usually initiate network activity.
Uncommon Connection to Active Directory Web Services
Detects uncommon network connections to the Active Directory Web Services (ADWS) from processes not typically associated with ADWS management.
Uncommon Network Connection Initiated By Certutil.EXE
Detects a network connection initiated by the certutil.exe utility. Attackers can abuse the utility in order to download malware or additional payloads.
Outbound Network Connection Initiated By Cmstp.EXE
Detects a network connection initiated by Cmstp.EXE Its uncommon for "cmstp.exe" to initiate an outbound network connection. Investigate the source of such requests to determine if they are malicious.
Outbound Network Connection Initiated By Microsoft Dialer
Detects outbound network connection initiated by Microsoft Dialer. The Microsoft Dialer, also known as Phone Dialer, is a built-in utility application included in various versions of the Microsoft Windows operating system. Its primary function is to provide users with a graphical interface for managing phone calls via a modem or a phone line connected to the computer. This is an outdated process in the current conext of it's usage and is a common target for info stealers for process injection, and is used to make C2 connections, common example is "Rhadamanthys"
Network Connection Initiated To AzureWebsites.NET By Non-Browser Process
Detects an initiated network connection by a non browser process on the system to "azurewebsites.net". The latter was often used by threat actors as a malware hosting and exfiltration site.
Network Connection Initiated To BTunnels Domains
Detects network connections to BTunnels domains initiated by a process on the system. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.
Network Connection Initiated To Cloudflared Tunnels Domains
Detects network connections to Cloudflared tunnels domains initiated by a process on the system. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.
Network Communication With Crypto Mining Pool
Detects initiated network connections to crypto mining pools
New Connection Initiated To Potential Dead Drop Resolver Domain
Detects an executable, which is not an internet browser or known application, initiating network connections to legit popular websites, which were seen to be used as dead drop resolvers in previous attacks. In this context attackers leverage known websites such as "facebook", "youtube", etc. In order to pass through undetected.