Sigma Rules
3,132 rules found
Potential DCOM InternetExplorer.Application DLL Hijack
Detects potential DLL hijack of "iertutil.dll" found in the DCOM InternetExplorer.Application Class over the network
Desktop.INI Created by Uncommon Process
Detects unusual processes accessing desktop.ini, which can be leveraged to alter how Explorer displays a folder's content (i.e. renaming files) without changing them on disk.
DLL Search Order Hijackig Via Additional Space in Path
Detects when an attacker create a similar folder structure to windows system folders such as (Windows, Program Files...) but with a space in order to trick DLL load search order and perform a "DLL Search Order Hijacking" attack
Potentially Suspicious DMP/HDMP File Creation
Detects the creation of a file with the ".dmp"/".hdmp" extension by a shell or scripting application such as "cmd", "powershell", etc. Often created by software during a crash. Memory dumps can sometimes contain sensitive information such as credentials. It's best to determine the source of the crash.
Potential Persistence Attempt Via ErrorHandler.Cmd
Detects creation of a file named "ErrorHandler.cmd" in the "C:\WINDOWS\Setup\Scripts\" directory which could be used as a method of persistence The content of C:\WINDOWS\Setup\Scripts\ErrorHandler.cmd is read whenever some tools under C:\WINDOWS\System32\oobe\ (e.g. Setup.exe) fail to run for any reason.
Suspicious ASPX File Drop by Exchange
Detects suspicious file type dropped by an Exchange component in IIS into a suspicious folder
Suspicious File Drop by Exchange
Detects suspicious file type dropped by an Exchange component in IIS
GoToAssist Temporary Installation Artefact
An adversary may use legitimate desktop support and remote access software, such as Team Viewer, Go2Assist, LogMein, AmmyyAdmin, etc, to establish an interactive command and control channel to target systems within networks. These services are commonly used as legitimate technical support software, and may be allowed by application control within a target environment. Remote access tools like VNC, Ammyy, and Teamviewer are used frequently when compared with other legitimate software commonly used by adversaries. (Citation: Symantec Living off the Land)
Uncommon File Created by Notepad++ Updater Gup.EXE
Detects when the Notepad++ updater (gup.exe) creates files in suspicious or uncommon locations. This could indicate potential exploitation of the updater component to deliver unwanted malware or unwarranted files.
HackTool - CrackMapExec File Indicators
Detects file creation events with filename patterns used by CrackMapExec.
HackTool - Dumpert Process Dumper Default File
Detects the creation of the default dump file used by Outflank Dumpert tool. A process dumper, which dumps the lsass process memory
HackTool - Typical HiveNightmare SAM File Export
Detects files written by the different tools that exploit HiveNightmare
HackTool - Inveigh Execution Artefacts
Detects the presence and execution of Inveigh via dropped artefacts
HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators
Detects the creation of file with specific names used by RemoteKrbRelay SMB Relay attack module.
HackTool - Mimikatz Kirbi File Creation
Detects the creation of files created by mimikatz such as ".kirbi", "mimilsa.log", etc.
HackTool - NetExec File Indicators
Detects file creation events indicating NetExec (nxc.exe) execution on the local machine. NetExec is a PyInstaller-bundled binary that extracts its embedded data files to a "_MEI<random>" directory under the Temp folder upon execution. Files dropped under the "\nxc\" sub-directory of that extraction path are unique to NetExec and serve as reliable on-disk indicators of execution. NetExec (formerly CrackMapExec) is a widely used post-exploitation and lateral movement tool used for Active Directory enumeration, credential harvesting, and remote code execution.
HackTool - NPPSpy Hacktool Usage
Detects the use of NPPSpy hacktool that stores cleartext passwords of users that logged in to a local file
HackTool - Powerup Write Hijack DLL
Powerup tool's Write Hijack DLL exploits DLL hijacking for privilege escalation. In it's default mode, it builds a self deleting .bat file which executes malicious command. The detection rule relies on creation of the malicious bat file (debug.bat by default).
HackTool - QuarksPwDump Dump File
Detects a dump file written by QuarksPwDump password dumper
HackTool - Potential Remote Credential Dumping Activity Via CrackMapExec Or Impacket-Secretsdump
Detects default filenames output from the execution of CrackMapExec and Impacket-secretsdump against an endpoint.
HackTool - SafetyKatz Dump Indicator
Detects default lsass dump filename generated by SafetyKatz.
HackTool - Impacket File Indicators
Detects file creation events with filename patterns used by Impacket.
Potential Initial Access via DLL Search Order Hijacking
Detects attempts to create a DLL file to a known desktop application dependencies folder such as Slack, Teams or OneDrive and by an unusual process. This may indicate an attempt to load a malicious module via DLL search order hijacking.
Installation of TeamViewer Desktop
TeamViewer_Desktop.exe is create during install
Malicious DLL File Dropped in the Teams or OneDrive Folder
Detects creation of a malicious DLL file in the location where the OneDrive or Team applications Upon execution of the Teams or OneDrive application, the dropped malicious DLL file ("iphlpapi.dll") is sideloaded
ISO File Created Within Temp Folders
Detects the creation of a ISO file in the Outlook temp folder or in the Appdata temp folder. Typical of Qakbot TTP from end-July 2022.
ISO or Image Mount Indicator in Recent Files
Detects the creation of recent element file that points to an .ISO, .IMG, .VHD or .VHDX file as often used in phishing attacks. This can be a false positive on server systems but on workstations users should rarely mount .iso or .img files.
GatherNetworkInfo.VBS Reconnaissance Script Output
Detects creation of files which are the results of executing the built-in reconnaissance script "C:\Windows\System32\gatherNetworkInfo.vbs".
LSASS Process Memory Dump Files
Detects creation of files with names used by different memory dumping tools to create a memory dump of the LSASS process memory, which contains user credentials.
LSASS Process Dump Artefact In CrashDumps Folder
Detects the presence of an LSASS dump file in the "CrashDumps" folder. This could be a sign of LSASS credential dumping. Techniques such as the LSASS Shtinkering have been seen abusing the Windows Error Reporting to dump said process.
WerFault LSASS Process Memory Dump
Detects WerFault creating a dump file with a name that indicates that the dump file could be an LSASS process memory, which contains user credentials
Adwind RAT / JRAT File Artifact
Detects javaw.exe in AppData folder as used by Adwind / JRAT
Octopus Scanner Malware
Detects Octopus Scanner Malware.
File Creation In Suspicious Directory By Msdt.EXE
Detects msdt.exe creating files in suspicious directories which could be a sign of exploitation of either Follina or Dogwalk vulnerabilities
Uncommon File Creation By Mysql Daemon Process
Detects the creation of files with scripting or executable extensions by Mysql daemon. Which could be an indicator of "User Defined Functions" abuse to download malware.
Suspicious DotNET CLR Usage Log Artifact
Detects the creation of Usage Log files by the CLR (clr.dll). These files are named after the executing process once the assembly is finished executing for the first time in the (user) session context.
Suspicious File Creation In Uncommon AppData Folder
Detects the creation of suspicious files and folders inside the user's AppData folder but not inside any of the common and well known directories (Local, Romaing, LocalLow). This method could be used as a method to bypass detection who exclude the AppData folder in fear of FPs
SCR File Write Event
Detects the creation of screensaver files (.scr) outside of system folders. Attackers may execute an application as an ".SCR" file using "rundll32.exe desk.cpl,InstallScreenSaver" for example.
Potential Persistence Via Notepad++ Plugins
Detects creation of new ".dll" files inside the plugins directory of a notepad++ installation by a process other than "gup.exe". Which could indicates possible persistence
NTDS.DIT Created
Detects creation of a file named "ntds.dit" (Active Directory Database)
NTDS.DIT Creation By Uncommon Parent Process
Detects creation of a file named "ntds.dit" (Active Directory Database) by an uncommon parent process or directory
NTDS.DIT Creation By Uncommon Process
Detects creation of a file named "ntds.dit" (Active Directory Database) by an uncommon process or a process located in a suspicious directory
NTDS Exfiltration Filename Patterns
Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltration.
Potential Persistence Via Microsoft Office Add-In
Detects potential persistence activity via startup add-ins that load when Microsoft Office starts (.wll/.xll are simply .dll fit for Word or Excel).
Office Macro File Creation
Detects the creation of a new office macro files on the systems
Office Macro File Download
Detects the creation of a new office macro files on the system via an application (browser, mail client). This can help identify potential malicious activity, such as the download of macro-enabled documents that could be used for exploitation.
Office Macro File Creation From Suspicious Process
Detects the creation of a office macro file from a a suspicious process
OneNote Attachment File Dropped In Suspicious Location
Detects creation of files with the ".one"/".onepkg" extension in suspicious or uncommon locations. This could be a sign of attackers abusing OneNote attachments