Sigma Rules
3,707 rules found for "sigma"
Lazarus APT DLL Sideloading Activity
Detects sideloading of trojanized DLLs used in Lazarus APT campaign in the case of a Spanish aerospace company
Mint Sandstorm - AsperaFaspex Suspicious Process Execution
Detects suspicious execution from AsperaFaspex as seen used by Mint Sandstorm
Mint Sandstorm - Log4J Wstomcat Process Execution
Detects Log4J Wstomcat process execution as seen in Mint Sandstorm activity
Mint Sandstorm - ManageEngine Suspicious Process Execution
Detects suspicious execution from ManageEngine as seen used by Mint Sandstorm
Potential APT Mustang Panda Activity Against Australian Gov
Detects specific command line execution used by Mustang Panda in a targeted attack against the Australian government as reported by Lab52
Okta 2023 Breach Indicator Of Compromise
Detects new user account creation or activation with specific names related to the Okta Support System 2023 breach. This rule can be enhanced by filtering out known and legitimate username used in your environnement.
Onyx Sleet APT File Creation Indicators
Detects file creation activity that is related to Onyx Sleet APT activity
PaperCut MF/NG Exploitation Related Indicators
Detects exploitation indicators related to PaperCut MF/NG Exploitation
PaperCut MF/NG Potential Exploitation
Detects suspicious child processes of "pc-app.exe". Which could indicate potential exploitation of PaperCut
Peach Sandstorm APT Process Activity Indicators
Detects process creation activity related to Peach Sandstorm APT
Potential Peach Sandstorm APT C2 Communication Activity
Detects potential C2 communication activity related to Peach Sandstorm APT
UNC4841 - Email Exfiltration File Pattern
Detects filename pattern of email related data used by UNC4841 for staging and exfiltration
UNC4841 - Barracuda ESG Exploitation Indicators
Detects file indicators as seen used by UNC4841 during their Barracuda ESG zero day exploitation.
UNC4841 - SSL Certificate Exfiltration Via Openssl
Detects the execution of "openssl" to connect to an IP address. This techniques was used by UNC4841 to exfiltrate SSL certificates and as a C2 channel with named pipes. Investigate commands executed in the temporal vicinity of this command.
UNC4841 - Download Compressed Files From Temp.sh Using Wget
Detects execution of "wget" to download a ".zip" or ".rar" files from "temp.sh". As seen used by UNC4841 during their Barracuda ESG zero day exploitation.
UNC4841 - Download Tar File From Untrusted Direct IP Via Wget
Detects execution of "wget" to download a "tar" from an IP address that doesn't have a trusted certificate. As seen used by UNC4841 during their Barracuda ESG zero day exploitation.
UNC4841 - Potential SEASPY Execution
Detects execution of specific named binaries which were used by UNC4841 to deploy their SEASPY backdoor
CVE-2024-1212 Exploitation - Progress Kemp LoadMaster Unauthenticated Command Injection
Detects potential exploitation of CVE-2024-1709 an unauthenticated command injection in Progress Kemp LoadMaster. It looks for GET requests to '/access/set' API with the parameters 'param=enableapi' and 'value=1' as well as an "Authorization" header with a base64 encoded value with an uncommon character.
CVE-2024-1708 - ScreenConnect Path Traversal Exploitation
This detects file modifications to ASPX and ASHX files within the root of the App_Extensions directory, which is allowed by a ZipSlip vulnerability in versions prior to 23.9.8. This occurs during exploitation of CVE-2024-1708.
CVE-2024-1708 - ScreenConnect Path Traversal Exploitation - Security
This detects file modifications to ASPX and ASHX files within the root of the App_Extensions directory, which is allowed by a ZipSlip vulnerability in versions prior to 23.9.8. This occurs during exploitation of CVE-2024-1708. This requires an Advanced Auditing policy to log a successful Windows Event ID 4663 events and with a SACL set on the directory.
ScreenConnect User Database Modification
Detects file modifications to the temporary xml user database file indicating local user modification in the ScreenConnect server. This will occur during exploitation of the ScreenConnect Authentication Bypass vulnerability (CVE-2024-1709) in versions <23.9.8, but may also be observed when making legitimate modifications to local users or permissions.
CVE-2024-1709 - ScreenConnect Authentication Bypass Exploitation
Detects GET requests to '/SetupWizard.aspx/[anythinghere]' that indicate exploitation of the ScreenConnect vulnerability CVE-2024-1709.
ScreenConnect User Database Modification - Security
This detects file modifications to the temporary xml user database file indicating local user modification in the ScreenConnect server. This will occur during exploitation of the ScreenConnect Authentication Bypass vulnerability (CVE-2024-1709) in versions <23.9.8, but may also be observed when making legitimate modifications to local users or permissions. This requires an Advanced Auditing policy to log a successful Windows Event ID 4663 events and with a SACL set on the directory.
Potential Exploitation of CVE-2024-3094 - Suspicious SSH Child Process
Detects potentially suspicious child process of SSH process (sshd) with a specific execution user. This could be a sign of potential exploitation of CVE-2024-3094.
Potential CVE-2024-3400 Exploitation - Palo Alto GlobalProtect OS Command Injection - File Creation
Detects suspicious file creations in the Palo Alto Networks PAN-OS' parent telemetry folder, which are processed by the vulnerable 'dt_curl' script if device telemetry is enabled. As said script overrides the shell-subprocess restriction, arbitrary command execution may occur by carefully crafting filenames that are escaped through this function.
Potential CVE-2024-3400 Exploitation - Palo Alto GlobalProtect OS Command Injection
Detects potential exploitation attempts of CVE-2024-3400 - an OS command injection in Palo Alto GlobalProtect. This detection looks for suspicious strings that indicate a potential directory traversal attempt or command injection.
Potential CVE-2024-35250 Exploitation Activity
Detects potentially suspicious loading of "ksproxy.ax", which may indicate an attempt to exploit CVE-2024-35250.
Potential Exploitation of CVE-2024-37085 - Suspicious Creation Of ESX Admins Group
Detects execution of the "net.exe" command in order to add a group named "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.
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.
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.
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.