Sigma Rules
2,824 rules found
Potential Exploitation of CVE-2024-37085 - Suspicious ESX Admins Group Activity
Detects any creation or modification to a windows domain group with the name "ESX Admins". This could indicates a potential exploitation attempt of CVE-2024-37085, which allows an attacker to elevate their privileges to full administrative access on an domain-joined ESXi hypervisor. VMware ESXi hypervisors joined to an Active Directory domain consider any member of a domain group named "ESX Admins" to have full administrative access by default.
CVE-2024-49113 Exploitation Attempt - LDAP Nightmare
Detects exploitation attempt of CVE-2024-49113 known as LDAP Nightmare, based on "Application Error" log where the faulting application is "lsass.exe" and the faulting module is "WLDAP32.dll".
CVE-2024-50623 Exploitation Attempt - Cleo
Detects exploitation attempt of Cleo's CVE-2024-50623 by looking for a "cmd.exe" process spawning from the Celo software suite with suspicious Powershell commandline.
Potential CSharp Streamer RAT Loading .NET Executable Image
Detects potential CSharp Streamer RAT loading .NET executable image by using the default file name and path associated with the tool.
DarkGate - Drop DarkGate Loader In C:\Temp Directory
Detects attackers attempting to save, decrypt and execute the DarkGate Loader in C:\temp folder.
File Creation Related To RAT Clients
File .conf created related to VenomRAT, AsyncRAT and Lummac samples observed in the wild.
Potential KamiKakaBot Activity - Lure Document Execution
Detects the execution of a Word document via the WinWord Start Menu shortcut. This behavior was observed being used by KamiKakaBot samples in order to initiate the 2nd stage of the infection.
Potential KamiKakaBot Activity - Shutdown Schedule Task Creation
Detects the creation of a schedule task that runs weekly and execute the "shutdown /l /f" command. This behavior was observed being used by KamiKakaBot samples in order to achieve persistence on a system.
Potential KamiKakaBot Activity - Winlogon Shell Persistence
Detects changes to the "Winlogon" registry key where a process will set the value of the "Shell" to a value that was observed being used by KamiKakaBot samples in order to achieve persistence.
Potential Kapeka Decrypted Backdoor Indicator
Detects the presence of a file that is decrypted backdoor binary dropped by the Kapeka Dropper, which disguises itself as a hidden file under a folder named "Microsoft" within "CSIDL_COMMON_APPDATA" or "CSIDL_LOCAL_APPDATA", depending on the process privileges. The file, typically 5-6 characters long with a random combination of consonants and vowels followed by a ".wll" extension to pose as a legitimate file to evade detection.
Kapeka Backdoor Loaded Via Rundll32.EXE
Detects the Kapeka Backdoor binary being loaded by rundll32.exe. The Kapeka loader drops a backdoor, which is a DLL with the '.wll' extension masquerading as a Microsoft Word Add-In.
Kapeka Backdoor Persistence Activity
Detects Kapeka backdoor persistence activity. Depending on the process privileges, the Kapeka dropper then sets persistence for the backdoor either as a scheduled task (if admin or SYSTEM) or autorun registry (if not). For the scheduled task, it creates a scheduled task called "Sens Api" via schtasks command, which is set to run upon system startup as SYSTEM. To establish persistence through the autorun utility, it adds an autorun entry called "Sens Api" under HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run via the "reg add" command. Both persistence mechanisms are set to launch the binary by calling rundll32 and passing the backdoor's first export ordinal (#1) without any additional argument.
Kapeka Backdoor Execution Via RunDLL32.EXE
Detects Kapeka backdoor process execution pattern, where the dropper launch the backdoor binary by calling rundll32 and passing the backdoor's first export ordinal (#1) with a "-d" argument.
Kapeka Backdoor Autorun Persistence
Detects the setting of a new value in the Autorun key that is used by the Kapeka backdoor for persistence.
Kapeka Backdoor Configuration Persistence
Detects registry set activity of a value called "Seed" stored in the "\Cryptography\Providers\" registry key. The Kapeka backdoor leverages this location to register a new SIP provider for backdoor configuration persistence.
Kapeka Backdoor Scheduled Task Creation
Detects Kapeka backdoor scheduled task creation based on attributes such as paths, commands line flags, etc.
Lummac Stealer Activity - Execution Of More.com And Vbc.exe
Detects the execution of more.com and vbc.exe in the process tree. This behavior was observed by a set of samples related to Lummac Stealer. The Lummac payload is injected into the vbc.exe process.
Potential Raspberry Robin Aclui Dll SideLoading
Detects potential sideloading of malicious "aclui.dll" by OleView.This behavior was observed in Raspberry-Robin variants reported by chekpoint research on Feburary 2024.
Potential Raspberry Robin CPL Execution Activity
Detects the execution of a ".CPL" file located in the user temp directory via the Shell32 DLL "Control_RunDLL" export function. This behavior was observed in multiple Raspberry-Robin variants.
Potential Raspberry Robin Registry Set Internet Settings ZoneMap
Detects registry modifications related to the proxy configuration of the system, potentially associated with the Raspberry Robin malware, as seen in campaigns running in Q1 2024. Raspberry Robin may alter proxy settings to circumvent security measures, ensuring unhindered connection with Command and Control servers for maintaining control over compromised systems if there are any proxy settings that are blocking connections.
DPRK Threat Actor - C2 Communication DNS Indicators
Detects DNS queries for C2 domains used by DPRK Threat actors.
Potential APT FIN7 Exploitation Activity
Detects potential APT FIN7 exploitation activity as reported by Google. In order to obtain initial access, FIN7 used compromised Remote Desktop Protocol (RDP) credentials to login to a target server and initiate specific Windows process chains.
Forest Blizzard APT - File Creation Activity
Detects the creation of specific files inside of ProgramData directory. These files were seen being created by Forest Blizzard as described by MSFT.
Forest Blizzard APT - JavaScript Constrained File Creation
Detects the creation of JavaScript files inside of the DriverStore directory. Forest Blizzard used this to exploit the CVE-2022-38028 vulnerability in Windows Print Spooler service by modifying a JavaScript constraints file and executing it with SYSTEM-level permissions.
Forest Blizzard APT - Process Creation Activity
Detects the execution of specific processes and command line combination. These were seen being created by Forest Blizzard as described by MSFT.
Forest Blizzard APT - Custom Protocol Handler Creation
Detects the setting of a custom protocol handler with the name "rogue". Seen being created by Forest Blizzard APT as reported by MSFT.
Forest Blizzard APT - Custom Protocol Handler DLL Registry Set
Detects the setting of the DLL that handles the custom protocol handler. Seen being created by Forest Blizzard APT as reported by MSFT.
ScreenConnect - SlashAndGrab Exploitation Indicators
Detects indicators of exploitation by threat actors during exploitation of the "SlashAndGrab" vulnerability related to ScreenConnect as reported Team Huntress
Potential Exploitation of GoAnywhere MFT Vulnerability
Detects suspicious command execution by child processes of the GoAnywhere Managed File Transfer (MFT) application, which may indicate exploitation such as CVE-2025-10035. This behavior is indicative of post-exploitation activity related to CVE-2025-10035, as observed in campaigns by the threat actor Storm-1175.
Suspicious Creation of .library-ms File — Potential CVE-2025-24054 Exploit
Detects creation of '.library-ms' files, which may indicate exploitation of CVE-2025-24054. This vulnerability allows an attacker to trigger an automatic outbound SMB or WebDAV authentication request to a remote server upon archive extraction. If the system is unpatched, no user interaction is required beyond extracting a malicious archive—potentially exposing the user's NTLMv2-SSP hash to the attacker.
Suspicious Process Spawned by CentreStack Portal AppPool
Detects unexpected command shell execution (cmd.exe) from w3wp.exe when tied to CentreStack's portal.config, indicating potential exploitation (e.g., CVE-2025-30406)
Suspicious CrushFTP Child Process
Detects suspicious child processes spawned by the CrushFTP service that may indicate exploitation of remote code execution vulnerabilities such as CVE-2025-31161, where attackers can achieve RCE through crafted HTTP requests. The detection focuses on commonly abused Windows executables (like powershell.exe, cmd.exe etc.) that attackers typically use post-exploitation to execute malicious commands.
Potential SAP NetWeaver Webshell Creation
Detects the creation of suspicious files (jsp, java, class) in SAP NetWeaver directories, which may indicate exploitation attempts of vulnerabilities such as CVE-2025-31324.
Suspicious Child Process of SAP NetWeaver
Detects suspicious child processes spawned by SAP NetWeaver that could indicate potential exploitation of vulnerability that allows arbitrary execution via webshells such as CVE-2025-31324.
Potential Exploitation of RCE Vulnerability CVE-2025-33053 - Image Load
Detects potential exploitation of remote code execution vulnerability CVE-2025-33053 by monitoring suspicious image loads from WebDAV paths. The exploit involves malicious executables from attacker-controlled WebDAV servers loading the Windows system DLLs like gdi32.dll, netapi32.dll, etc.
Potential Exploitation of RCE Vulnerability CVE-2025-33053 - Process Access
Detects potential exploitation of remote code execution vulnerability CVE-2025-33053 by looking for process access that involves legitimate Windows executables (iediagcmd.exe, CustomShellHost.exe) accessing suspicious executables hosted on WebDAV shares. This indicates an attacker may be exploiting Process.Start() search order manipulation to execute malicious code from attacker-controlled WebDAV servers instead of legitimate system binaries. The vulnerability allows unauthorized code execution through external control of file names or paths via WebDAV.
Potential Exploitation of RCE Vulnerability CVE-2025-33053
Detects potential exploitation of remote code execution vulnerability CVE-2025-33053 which involves unauthorized code execution via WebDAV through external control of file names or paths. The exploit abuses legitimate utilities like iediagcmd.exe or CustomShellHost.exe by manipulating their working directories to point to attacker-controlled WebDAV servers, causing them to execute malicious executables (like route.exe) from the WebDAV path instead of legitimate system binaries through Process.Start() search order manipulation.
Suspicious Child Process of SolarWinds WebHelpDesk
Detects suspicious child processes spawned by SolarWinds WebHelpDesk (WHD) application, which may indicate exploitation activity leveraging RCE vulnerabilities such as CVE-2025-40551, CVE-2025-40536, or CVE-2025-26399
Potential Notepad++ CVE-2025-49144 Exploitation
Detects potential exploitation of CVE-2025-49144, a local privilege escalation vulnerability in Notepad++ installers (v8.8.1 and prior) where the installer calls regsvr32.exe without specifying the full path. This allows an attacker to execute arbitrary code with elevated privileges by placing a malicious regsvr32.exe alongside this Legitimate Notepad++ installer. The vulnerability is triggered when the installer attempts to register the NppShell.dll file, which is a component of Notepad++.
Potential SharePoint ToolShell CVE-2025-53770 Exploitation - File Create
Detects the creation of file such as spinstall0.aspx which may indicate successful exploitation of CVE-2025-53770. CVE-2025-53770 is a zero-day vulnerability in SharePoint that allows remote code execution.
Potential SharePoint ToolShell CVE-2025-53770 Exploitation Indicators
Detects potential exploitation of CVE-2025-53770 by identifying indicators such as suspicious command lines discovered in Post-Exploitation activities. CVE-2025-53770 is a zero-day vulnerability in SharePoint that allows remote code execution.
Potential Exploitation of CrushFTP RCE Vulnerability (CVE-2025-54309)
Detects suspicious child processes created by CrushFTP. It could be an indication of exploitation of a RCE vulnerability such as CVE-2025-54309.
Windows Suspicious Child Process from Node.js - React2Shell
Detects suspicious child processes started by Node.js server processes on Windows, which may indicate exploitation of vulnerabilities like CVE-2025-55182 (React2Shell). Attackers can abuse the Node.js 'child_process' module to run system commands or scripts using methods such as spawn(), exec(), execFile(), fork(), or execSync(). If execSync() or exec() is used in the exploit, the command line often shows a shell (e.g., cmd.exe /d /s /c ...) running a suspicious command unless other shells are explicitly invoked. For other methods, the spawned process appears directly in the Image field unless a shell is explicitly used.
Commvault QLogin with PublicSharingUser and GUID Password (CVE-2025-57788)
Detects a qlogin.exe command attempting to authenticate as the internal `_+_PublicSharingUser_` using a GUID as the password. This could be an indicator of an attacker exploiting CVE-2025-57788 to gain initial access using leaked credentials.
Commvault QOperation Path Traversal Webshell Drop (CVE-2025-57790)
Detects the use of qoperation.exe with the -file argument to write a JSP file to the webroot, indicating a webshell drop. This is a post-authentication step corresponding to CVE-2025-57790.
Commvault QLogin Argument Injection Authentication Bypass (CVE-2025-57791)
Detects the use of argument injection in the Commvault qlogin command - potential exploitation for CVE-2025-57791. An attacker can inject the `-localadmin` parameter via the password field to bypass authentication and gain a privileged token.
Exploitation Activity of CVE-2025-59287 - WSUS Suspicious Child Process
Detects the creation of command-line interpreters (cmd.exe, powershell.exe) as child processes of Windows Server Update Services (WSUS) related process wsusservice.exe. This behavior is a key indicator of exploitation for the critical remote code execution vulnerability such as CVE-2025-59287, where attackers spawn shells to conduct reconnaissance and further post-exploitation activities.
Exploitation Activity of CVE-2025-59287 - WSUS Deserialization
Detects cast exceptions in Windows Server Update Services (WSUS) application logs that highly indicate exploitation attempts of CVE-2025-59287, a deserialization vulnerability in WSUS.