Sigma Rules
3,132 rules found for "sigma"
Mailbox Export to Exchange Webserver
Detects a successful export of an Exchange mailbox to untypical directory or with aspx name suffix which can be used to place a webshell or the needed role assignment for it
Remove Exported Mailbox from Exchange Webserver
Detects removal of an exported Exchange mailbox which could be to cover tracks from ProxyShell exploit
Exchange Set OabVirtualDirectory ExternalUrl Property
Rule to detect an adversary setting OabVirtualDirectory External URL property to a script in Exchange Management log
MSExchange Transport Agent Installation - Builtin
Detects the Installation of a Exchange Transport Agent
Failed MSExchange Transport Agent Installation
Detects a failed installation of a Exchange Transport Agent
NTLM Logon
Detects logons using NTLM, which could be caused by a legacy source or attackers
NTLM Brute Force
Detects common NTLM brute force device names
Potential Remote Desktop Connection to Non-Domain Host
Detects logons using NTLM to hosts that are potentially not part of the domain.
OpenSSH Server Listening On Socket
Detects scenarios where an attacker enables the OpenSSH server and server starts to listening on SSH socket.
Potential Access Token Abuse
Detects potential token impersonation and theft. Example, when using "DuplicateToken(Ex)" and "ImpersonateLoggedOnUser" with the "LOGON32_LOGON_NEW_CREDENTIALS flag".
Admin User Remote Logon
Detect remote login by Administrator user (depending on internal pattern).
DiagTrackEoP Default Login Username
Detects the default "UserName" used by the DiagTrackEoP POC
A Member Was Added to a Security-Enabled Global Group
Detects activity when a member is added to a security-enabled global group
A Member Was Removed From a Security-Enabled Global Group
Detects activity when a member is removed from a security-enabled global group
Successful Overpass the Hash Attempt
Detects successful logon with logon type 9 (NewCredentials) which matches the Overpass the Hash behavior of e.g Mimikatz's sekurlsa::pth module.
Pass the Hash Activity 2
Detects the attack technique pass the hash which is used to move laterally inside the network
RDP Login from Localhost
RDP login with localhost source address may be a tunnelled login
A Security-Enabled Global Group Was Deleted
Detects activity when a security-enabled global group is deleted
External Remote RDP Logon from Public IP
Detects successful logon from public IP address via RDP. This can indicate a publicly-exposed RDP port.
External Remote SMB Logon from Public IP
Detects successful logon from public IP address via SMB. This can indicate a publicly-exposed SMB port.
Failed Logon From Public IP
Detects a failed logon attempt from a public IP. A login from a public IP can indicate a misconfigured firewall or network boundary.
Outgoing Logon with New Credentials
Detects logon events that specify new credentials
Potential Privilege Escalation via Local Kerberos Relay over LDAP
Detects a suspicious local successful logon event where the Logon Package is Kerberos, the remote address is set to localhost, and the target user SID is the built-in local Administrator account. This may indicate an attempt to leverage a Kerberos relay attack variant that can be used to elevate privilege locally from a domain joined limited user to local System privileges.
RottenPotato Like Attack Pattern
Detects logon events that have characteristics of events generated during an attack with RottenPotato and the like
Successful Account Login Via WMI
Detects successful logon attempts performed with WMI
Windows Filtering Platform Blocked Connection From EDR Agent Binary
Detects a Windows Filtering Platform (WFP) blocked connection event involving common Endpoint Detection and Response (EDR) agents. Adversaries may use WFP filters to prevent Endpoint Detection and Response (EDR) agents from reporting security events.
Azure AD Health Monitoring Agent Registry Keys Access
This detection uses Windows security events to detect suspicious access attempts to the registry key of Azure AD Health monitoring agent. This detection requires an access control entry (ACE) on the system access control list (SACL) of the following securable object HKLM\SOFTWARE\Microsoft\Microsoft Online\Reporting\MonitoringAgent.
Azure AD Health Service Agents Registry Keys Access
This detection uses Windows security events to detect suspicious access attempts to the registry key values and sub-keys of Azure AD Health service agents (e.g AD FS). Information from AD Health service agents can be used to potentially abuse some of the features provided by those services in the cloud (e.g. Federation). This detection requires an access control entry (ACE) on the system access control list (SACL) of the following securable object: HKLM:\SOFTWARE\Microsoft\ADHealthAgent. Make sure you set the SACL to propagate to its sub-keys.
Powerview Add-DomainObjectAcl DCSync AD Extend Right
Backdooring domain object to grant the rights associated with DCSync to a regular user or machine account using Powerview\Add-DomainObjectAcl DCSync Extended Right cmdlet, will allow to re-obtain the pwd hashes of any user/computer
AD Privileged Users or Groups Reconnaissance
Detect priv users or groups recon based on 4661 eventid and known privileged users or groups SIDs
ADCS Certificate Template Configuration Vulnerability
Detects certificate creation with template allowing risk permission subject
ADCS Certificate Template Configuration Vulnerability with Risky EKU
Detects certificate creation with template allowing risk permission subject and risky EKU
Add or Remove Computer from DC
Detects the creation or removal of a computer. Can be used to detect attacks such as DCShadow via the creation of a new SPN.
Access To ADMIN$ Network Share
Detects access to ADMIN$ network share
AD Object WriteDAC Access
Detects WRITE_DAC access to a domain object
Active Directory Replication from Non Machine Account
Detects potential abuse of Active Directory Replication Service (ADRS) from a non machine account to request credentials.
Potential AD User Enumeration From Non-Machine Account
Detects read access to a domain user from a non-machine account
Enabled User Right in AD to Control User Objects
Detects scenario where if a user is assigned the SeEnableDelegationPrivilege right in Active Directory it would allow control of other AD user objects.
Active Directory User Backdoors
Detects scenarios where one can control another users or computers account without having to use their credentials.
Weak Encryption Enabled and Kerberoast
Detects scenario where weak encryption is enabled for a user profile which could be used for hash/password cracking.
Hacktool Ruler
This events that are generated when using the hacktool Ruler by Sensepost
Remote Task Creation via ATSVC Named Pipe
Detects remote task creation via at.exe or API interacting with ATSVC namedpipe
Security Eventlog Cleared
One of the Windows Eventlogs has been cleared. e.g. caused by "wevtutil cl" command execution
Processes Accessing the Microphone and Webcam
Potential adversaries accessing the microphone and webcam in an endpoint.
CobaltStrike Service Installations - Security
Detects known malicious service installs that appear in cases in which a Cobalt Strike beacon elevates privileges or lateral movement
Failed Code Integrity Checks
Detects code integrity failures such as missing page hashes or corrupted drivers due unauthorized modification. This could be a sign of tampered binaries.
DCERPC SMB Spoolss Named Pipe
Detects the use of the spoolss named pipe over SMB. This can be used to trigger the authentication via NTLM of any machine that has the spoolservice enabled.
DCOM InternetExplorer.Application Iertutil DLL Hijack - Security
Detects a threat actor creating a file named `iertutil.dll` in the `C:\Program Files\Internet Explorer\` directory over the network for a DCOM InternetExplorer DLL Hijack scenario.