Sigma Rules
557 rules found for "Red Canary"
Potential File Extension Spoofing Using Right-to-Left Override
Detects suspicious filenames that contain a right-to-left override character and a potentially spoofed file extensions.
Suspicious Startup Folder Persistence
Detects the creation of potentially malicious script and executable files in Windows startup folders, which is a common persistence technique used by threat actors. These files (.ps1, .vbs, .js, .bat, etc.) are automatically executed when a user logs in, making the Startup folder an attractive target for attackers. This technique is frequently observed in malvertising campaigns and malware distribution where attackers attempt to maintain long-term access to compromised systems.
Windows Terminal Profile Settings Modification By Uncommon Process
Detects the creation or modification of the Windows Terminal Profile settings file "settings.json" by an uncommon process.
LSASS Process Memory Dump Creation Via Taskmgr.EXE
Detects the creation of an "lsass.dmp" file by the taskmgr process. This indicates a manual dumping of the LSASS.exe process memory using Windows Task Manager.
VHD Image Download Via Browser
Detects creation of ".vhd"/".vhdx" files by browser processes. Malware can use mountable Virtual Hard Disk ".vhd" files to encapsulate payloads and evade security controls.
Writing Local Admin Share
Aversaries may use to interact with a remote network share using Server Message Block (SMB). This technique is used by post-exploitation frameworks.
CredUI.DLL Loaded By Uncommon Process
Detects loading of "credui.dll" and related DLLs by an uncommon process. Attackers might leverage this DLL for potential use of "CredUIPromptForCredentials" or "CredUnPackAuthenticationBufferW".
Network Connection Initiated By IMEWDBLD.EXE
Detects a network connection initiated by IMEWDBLD.EXE. This might indicate potential abuse of the utility as a LOLBIN in order to download arbitrary files or additional payloads.
Python Initiated Connection
Detects a Python process initiating a network connection. While this often relates to package installation, it can also indicate a potential malicious script communicating with a C&C server.
Remote Access Tool - AnyDesk Incoming Connection
Detects incoming connections to AnyDesk. This could indicate a potential remote attacker trying to connect to a listening instance of AnyDesk and use it as potential command and control channel.
Suspicious Network Connection Binary No CommandLine
Detects suspicious network connections made by a well-known Windows binary run with no command line parameters
Microsoft Sync Center Suspicious Network Connections
Detects suspicious connections from Microsoft Sync Center to non-private IPs.
Suspicious Outbound SMTP Connections
Adversaries may steal data by exfiltrating it over an un-encrypted network protocol other than that of the existing command and control channel. The data may also be sent to an alternate network location from the main command and control server.
Local Network Connection Initiated By Script Interpreter
Detects a script interpreter (Wscript/Cscript) initiating a local network connection to download or execute a script hosted on a shared folder.
Outbound Network Connection Initiated By Script Interpreter
Detects a script interpreter wscript/cscript opening a network connection to a non-local network. Adversaries may use script to download malicious payloads.
CobaltStrike Named Pipe
Detects the creation of a named pipe as used by CobaltStrike
Delete Volume Shadow Copies Via WMI With PowerShell
Shadow Copies deletion using operating systems utilities via PowerShell
Netcat The Powershell Version
Adversaries may use a non-application layer protocol for communication between host and C2 server or among infected hosts within a network
Potential RemoteFXvGPUDisablement.EXE Abuse
Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". This could be a sign of potential abuse of the "RemoteFXvGPUDisablement.exe" binary which is known to be vulnerable to module load-order hijacking.
Use Get-NetTCPConnection
Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network.
Zip A Folder With PowerShell For Staging In Temp - PowerShell
Detects PowerShell scripts that make use of the "Compress-Archive" Cmdlet in order to compress folders and files where the output is stored in a potentially suspicious location that is used often by malware for exfiltration. An adversary might compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.
Tamper Windows Defender - PSClassic
Attempting to disable scheduled scanning and other parts of Windows Defender ATP or set default actions to allow.
Potential RemoteFXvGPUDisablement.EXE Abuse - PowerShell Module
Detects PowerShell module creation where the module Contents are set to "function Get-VMRemoteFXPhysicalVideoAdapter". This could be a sign of potential abuse of the "RemoteFXvGPUDisablement.exe" binary which is known to be vulnerable to module load-order hijacking.
AD Groups Or Users Enumeration Using PowerShell - PoshModule
Adversaries may attempt to find domain-level groups and permission settings. The knowledge of domain-level permission groups can help adversaries determine which groups exist and which users belong to a particular group. Adversaries may use this information to determine which users have elevated permissions, such as domain administrators.
Use Get-NetTCPConnection - PowerShell Module
Adversaries may attempt to get a listing of network connections to or from the compromised system they are currently accessing or from remote systems by querying for information over the network.
Suspicious Get Local Groups Information
Detects the use of PowerShell modules and cmdlets to gather local group information. Adversaries may use local system permission groups to determine which groups exist and which users belong to a particular group such as the local administrators group.
Suspicious Get Information for SMB Share - PowerShell Module
Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement. Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network.
Zip A Folder With PowerShell For Staging In Temp - PowerShell Module
Detects PowerShell scripts that make use of the "Compress-Archive" Cmdlet in order to compress folders and files where the output is stored in a potentially suspicious location that is used often by malware for exfiltration. An adversary might compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network.
Access to Browser Login Data
Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers commonly save credentials such as website usernames and passwords so that they do not need to be entered manually in the future. Web browsers typically store the credentials in an encrypted format within a credential store.
Get-ADUser Enumeration Using UserAccountControl Flags
Detects AS-REP roasting is an attack that is often-overlooked. It is not very common as you have to explicitly set accounts that do not require pre-authentication.
Automated Collection Command PowerShell
Once established within a system or network, an adversary may use automated techniques for collecting internal data.
Windows Screen Capture with CopyFromScreen
Adversaries may attempt to take screen captures of the desktop to gather information over the course of an operation. Screen capturing functionality may be included as a feature of a remote access tool used in post-compromise operations
Powershell Create Scheduled Task
Adversaries may abuse the Windows Task Scheduler to perform task scheduling for initial or recurring execution of malicious code
Powershell Install a DLL in System Directory
Uses PowerShell to install/copy a file into a system directory such as "System32" or "SysWOW64"
Registry-Free Process Scope COR_PROFILER
Adversaries may leverage the COR_PROFILER environment variable to hijack the execution flow of programs that load the .NET CLR. The COR_PROFILER is a .NET Framework feature which allows developers to specify an unmanaged (or external of .NET) profiling DLL to be loaded into each .NET process that loads the Common Language Runtime (CLR). These profiliers are designed to monitor, troubleshoot, and debug managed code executed by the .NET CLR. (Citation: Microsoft Profiling Mar 2017) (Citation: Microsoft COR_PROFILER Feb 2013)
PowerShell Create Local User
Detects creation of a local user via PowerShell
Powershell Detect Virtualization Environment
Adversaries may employ various system checks to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox
DirectorySearcher Powershell Exploitation
Enumerates Active Directory to determine computers that are joined to the domain
Manipulation of User Computer or Group Security Principals Across AD
Adversaries may create a domain account to maintain access to victim systems. Domain accounts are those managed by Active Directory Domain Services where access and permissions are configured across systems and services that are part of that domain..
Disable-WindowsOptionalFeature Command PowerShell
Detect built in PowerShell cmdlet Disable-WindowsOptionalFeature, Deployment Image Servicing and Management tool. Similar to DISM.exe, this cmdlet is used to enumerate, install, uninstall, configure, and update features and packages in Windows images
Dump Credentials from Windows Credential Manager With PowerShell
Adversaries may search for common password storage locations to obtain user credentials. Passwords are stored in several places on a system, depending on the operating system or application holding the credentials.
Enable Windows Remote Management
Adversaries may use Valid Accounts to interact with remote systems using Windows Remote Management (WinRM). The adversary may then perform actions as the logged-on user.
Enumerate Credentials from Windows Credential Manager With PowerShell
Adversaries may search for common password storage locations to obtain user credentials. Passwords are stored in several places on a system, depending on the operating system or application holding the credentials.
Service Registry Permissions Weakness Check
Adversaries may execute their own malicious payloads by hijacking the Registry entries used by services. Adversaries may use flaws in the permissions for registry to redirect from the originally specified executable to one that they control, in order to launch their own code at Service start. Windows stores local service configuration information in the Registry under HKLM\SYSTEM\CurrentControlSet\Services
Active Directory Computers Enumeration With Get-AdComputer
Detects usage of the "Get-AdComputer" to enumerate Computers or properties within Active Directory.
Active Directory Group Enumeration With Get-AdGroup
Detects usage of the "Get-AdGroup" cmdlet to enumerate Groups within Active Directory
Suspicious Get-ADReplAccount
The DSInternals PowerShell Module exposes several internal features of Active Directory and Azure Active Directory. These include FIDO2 and NGC key auditing, offline ntds.dit file manipulation, password auditing, DC recovery from IFM backups and password hash calculation.
Automated Collection Bookmarks Using Get-ChildItem PowerShell
Adversaries may enumerate browser bookmarks to learn more about compromised hosts. Browser bookmarks may reveal personal information about users (ex: banking sites, interests, social media, etc.) as well as details about internal network resources such as servers, tools/dashboards, or other related infrastructure.