Sigma Rules
957 rules found for "Nasreddine Bencherchali (Nextron Systems)"
ADS Zone.Identifier Deleted By Uncommon Application
Detects the deletion of the "Zone.Identifier" ADS by an uncommon process. Attackers can leverage this in order to bypass security restrictions that make use of the ADS such as Microsoft Office apps.
Suspicious Binary Writes Via AnyDesk
Detects AnyDesk writing binary files to disk other than "gcapi.dll". According to RedCanary research it is highly abnormal for AnyDesk to write executable files to disk besides gcapi.dll, which is a legitimate DLL that is part of the Google Chrome web browser used to interact with the Google Cloud API. (See reference section for more details)
Assembly DLL Creation Via AspNetCompiler
Detects the creation of new DLL assembly files by "aspnet_compiler.exe", which could be a sign of "aspnet_compiler" abuse to proxy execution through a build provider.
Creation Of Non-Existent System DLL
Detects creation of specific system DLL files that are usually not present on the system (or at least not in system directories) but may be loaded by legitimate processes. Phantom DLL hijacking involves placing malicious DLLs with names of non-existent system binaries in locations where legitimate applications may search for them, leading to execution of the malicious DLLs. Thus, the creation of such DLLs may indicate preparation for phantom DLL hijacking attacks.
New Custom Shim Database Created
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by application shims. The Microsoft Windows Application Compatibility Infrastructure/Framework (Application Shim) was created to allow for backward compatibility of software as the operating system codebase changes over time.
Files With System DLL Name In Unsuspected Locations
Detects the creation of a file with the ".dll" extension that has the name of a System DLL in uncommon or unsuspected locations. (Outisde of "System32", "SysWOW64", etc.). It is highly recommended to perform an initial baseline before using this rule in production.
Files With System Process Name In Unsuspected Locations
Detects the creation of an executable with a system process name in folders other than the system ones (System32, SysWOW64, etc.). It is highly recommended to perform an initial baseline before using this rule in production.
CSExec Service File Creation
Detects default CSExec service filename which indicates CSExec service installation and execution
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.
HackTool - CrackMapExec File Indicators
Detects file creation events with filename patterns used by CrackMapExec.
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.
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".
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
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 Process
Detects creation of a file named "ntds.dit" (Active Directory Database) by an uncommon process or a process located in a suspicious directory
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
Suspicious File Created Via OneNote Application
Detects suspicious files created via the OneNote application. This could indicate a potential malicious ".one"/".onepkg" file was executed as seen being used in malware activity in the wild
Suspicious Outlook Macro Created
Detects the creation of a macro file for Outlook.
Publisher Attachment File Dropped In Suspicious Location
Detects creation of files with the ".pub" extension in suspicious or uncommon locations. This could be a sign of attackers abusing Publisher documents
Potential Persistence Via Microsoft Office Startup Folder
Detects creation of Microsoft Office files inside of one of the default startup folders in order to achieve persistence.
File With Uncommon Extension Created By An Office Application
Detects the creation of files with an executable or script extension by an Office application.
Uncommon File Created In Office Startup Folder
Detects the creation of a file with an uncommon extension in an Office application startup folder
Suspicious File Created In PerfLogs
Detects suspicious file based on their extension being created in "C:\PerfLogs\". Note that this directory mostly contains ".etl" files
Potential Binary Or Script Dropper Via PowerShell
Detects PowerShell creating a binary executable or a script file.
Malicious PowerShell Scripts - FileCreation
Detects the creation of known offensive powershell scripts used for exploitation
PowerShell Module File Created
Detects the creation of a new PowerShell module ".psm1", ".psd1", ".dll", ".ps1", etc.
Potential Suspicious PowerShell Module File Created
Detects the creation of a new PowerShell module in the first folder of the module directory structure "\WindowsPowerShell\Modules\malware\malware.psm1". This is somewhat an uncommon practice as legitimate modules often includes a version folder.
PowerShell Module File Created By Non-PowerShell Process
Detects the creation of a new PowerShell module ".psm1", ".psd1", ".dll", ".ps1", etc. by a non-PowerShell process
PSScriptPolicyTest Creation By Uncommon Process
Detects the creation of the "PSScriptPolicyTest" PowerShell script by an uncommon process. This file is usually generated by Microsoft Powershell to test against Applocker.
.RDP File Created By Uncommon Application
Detects creation of a file with an ".rdp" extension by an application that doesn't commonly create such files.
PDF File Created By RegEdit.EXE
Detects the creation of a file with the ".pdf" extension by the "RegEdit.exe" process. This indicates that a user is trying to print/save a registry key as a PDF in order to potentially extract sensitive information and bypass defenses.
RemCom Service File Creation
Detects default RemCom service filename which indicates RemCom service installation and execution
Windows Binaries Write Suspicious Extensions
Detects Windows executables that write files with suspicious extensions
Suspicious Double Extension Files
Detects dropped files with double extensions, which is often used by malware as a method to abuse the fact that Windows hide default extensions by default.
DPAPI Backup Keys And Certificate Export Activity IOC
Detects file names with specific patterns seen generated and used by tools such as Mimikatz and DSInternals related to exported or stolen DPAPI backup keys and certificates.
Suspicious LNK Double Extension File Created
Detects the creation of files with an "LNK" as a second extension. This is sometimes used by malware as a method to abuse the fact that Windows hides the "LNK" extension by default.
PowerShell Profile Modification
Detects the creation or modification of a powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
Drop Binaries Into Spool Drivers Color Folder
Detects the creation of suspcious binary files inside the "\windows\system32\spool\drivers\color\" as seen in the blog referenced below
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.
VsCode Powershell Profile Modification
Detects the creation or modification of a vscode related powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
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.