Sigma Rules
784 rules found for "Nasreddine Bencherchali (Nextron Systems)"
Zip A Folder With PowerShell For Staging In Temp - PowerShell Script
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 Remove-MpPreference - ScriptBlockLogging
Detects attempts to remove Windows Defender configuration using the 'MpPreference' cmdlet
Tamper Windows Defender - ScriptBlockLogging
Detects PowerShell scripts attempting to disable scheduled scanning and other parts of Windows Defender ATP or set default actions to allow.
User Discovery And Export Via Get-ADUser Cmdlet - PowerShell
Detects usage of the Get-ADUser cmdlet to collect user information and output it to a file
Potential Persistence Via PowerShell User Profile Using Add-Content
Detects calls to "Add-Content" cmdlet in order to modify the content of the user profile and potentially adding suspicious commands for persistence
Abuse of Service Permissions to Hide Services Via Set-Service - PS
Detects usage of the "Set-Service" powershell cmdlet to configure a new SecurityDescriptor that allows a service to be hidden from other utilities such as "sc.exe", "Get-Service"...etc. (Works only in powershell 7)
Veeam Backup Servers Credential Dumping Script Execution
Detects execution of a PowerShell script that contains calls to the "Veeam.Backup" class, in order to dump stored credentials.
Potentially Suspicious Call To Win32_NTEventlogFile Class - PSScript
Detects usage of the WMI class "Win32_NTEventlogFile" in a potentially suspicious way (delete, backup, change permissions, etc.) from a PowerShell script
Potential WinAPI Calls Via PowerShell Scripts
Detects use of WinAPI functions in PowerShell scripts
WMIC Unquoted Services Path Lookup - PowerShell
Detects known WMI recon method to look for unquoted service paths, often used by pentest inside of powershell scripts attackers enum scripts
HackTool - Generic Process Access
Detects process access requests from hacktool processes based on their default image name
Suspicious LSASS Access Via MalSecLogon
Detects suspicious access to LSASS handle via a call trace to "seclogon.dll" with a suspicious access right.
Uncommon Process Access Rights For Target Image
Detects process access request to uncommon target images with a "PROCESS_ALL_ACCESS" access mask.
7Zip Compressing Dump Files
Detects execution of 7z in order to compress a file with a ".dmp"/".dump" extension, which could be a step in a process of dump file exfiltration.
Suspicious AddinUtil.EXE CommandLine Execution
Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with suspicious Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.
Potential Adplus.EXE Abuse
Detects execution of "AdPlus.exe", a binary that is part of the Windows SDK that can be used as a LOLBIN in order to dump process memory and execute arbitrary commands.
AgentExecutor PowerShell Execution
Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with the ExecutionPolicy "Bypass" or any binary named "powershell.exe" located in the path provided by 6th positional argument
Suspicious AgentExecutor PowerShell Execution
Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with the ExecutionPolicy "Bypass" or any binary named "powershell.exe" located in the path provided by 6th positional argument
Suspicious Child Process of AspNetCompiler
Detects potentially suspicious child processes of "aspnet_compiler.exe".
Potentially Suspicious ASP.NET Compilation Via AspNetCompiler
Detects execution of "aspnet_compiler.exe" with potentially suspicious paths for compilation.
Set Suspicious Files as System Files Using Attrib.EXE
Detects the usage of attrib with the "+s" option to set scripts or executables located in suspicious locations as system files to hide them from users and make them unable to be deleted with simple rights. The rule limits the search to specific extensions and directories to avoid FPs
Audit Policy Tampering Via NT Resource Kit Auditpol
Threat actors can use an older version of the auditpol binary available inside the NT resource kit to change audit policy configuration to impair detection capability. This can be carried out by selectively disabling/removing certain audit policies as well as restoring a custom policy owned by the threat actor.
Indirect Command Execution From Script File Via Bash.EXE
Detects execution of Microsoft bash launcher without any flags to execute the content of a bash script directly. This can be used to potentially bypass defenses and execute Linux or Windows-based binaries directly via bash.
Data Export From MSSQL Table Via BCP.EXE
Detects the execution of the BCP utility in order to export data from the database. Attackers were seen saving their malware to a database column or table and then later extracting it via "bcp.exe" into a file.
Suspicious Child Process Of BgInfo.EXE
Detects suspicious child processes of "BgInfo.exe" which could be a sign of potential abuse of the binary to proxy execution via external VBScript
Uncommon Child Process Of BgInfo.EXE
Detects uncommon child processes of "BgInfo.exe" which could be a sign of potential abuse of the binary to proxy execution via external VBScript
File With Suspicious Extension Downloaded Via Bitsadmin
Detects usage of bitsadmin downloading a file with a suspicious extension
File Download Via Bitsadmin To A Suspicious Target Folder
Detects usage of bitsadmin downloading a file to a suspicious target folder
Potential Data Stealing Via Chromium Headless Debugging
Detects chromium based browsers starting in headless and debugging mode and pointing to a user profile. This could be a sign of data stealing or remote control
Browser Execution In Headless Mode
Detects execution of Chromium based browser in headless mode
File Download From Browser Process Via Inline URL
Detects execution of a browser process with a URL argument pointing to a file with a potentially interesting extension. This can be abused to download arbitrary files or to hide from the user for example by launching the browser in a minimized state.
Browser Started with Remote Debugging
Detects browsers starting with the remote debugging flags. Which is a technique often used to perform browser injection attacks
Potential Binary Proxy Execution Via Cdb.EXE
Detects usage of "cdb.exe" to launch arbitrary processes or commands from a debugger script file
File Download via CertOC.EXE
Detects when a user downloads a file by using CertOC.exe
File Download From IP Based URL Via CertOC.EXE
Detects when a user downloads a file from an IP based URL using CertOC.exe
Suspicious DLL Loaded via CertOC.EXE
Detects when a user installs certificates by using CertOC.exe to load the target DLL file.
Suspicious Download Via Certutil.EXE
Detects the execution of certutil with certain flags that allow the utility to download files.
Suspicious File Downloaded From Direct IP Via Certutil.EXE
Detects the execution of certutil with certain flags that allow the utility to download files from direct IPs.
Suspicious File Downloaded From File-Sharing Website Via Certutil.EXE
Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites.
File Encoded To Base64 Via Certutil.EXE
Detects the execution of certutil with the "encode" flag to encode a file to base64. This can be abused by threat actors and attackers for data exfiltration
Suspicious File Encoded To Base64 Via Certutil.EXE
Detects the execution of certutil with the "encode" flag to encode a file to base64 where the extensions of the file is suspicious
File In Suspicious Location Encoded To Base64 Via Certutil.EXE
Detects the execution of certutil with the "encode" flag to encode a file to base64 where the files are located in potentially suspicious locations
Certificate Exported Via Certutil.EXE
Detects the execution of the certutil with the "exportPFX" flag which allows the utility to export certificates.
Potential NTLM Coercion Via Certutil.EXE
Detects possible NTLM coercion via certutil using the 'syncwithWU' flag
Cloudflared Portable Execution
Detects the execution of the "cloudflared" binary from a non standard location.
Cloudflared Tunnel Connections Cleanup
Detects execution of the "cloudflared" tool with the tunnel "cleanup" flag in order to cleanup tunnel connections.
Cloudflared Tunnel Execution
Detects execution of the "cloudflared" tool to connect back to a tunnel. This was seen used by threat actors to maintain persistence and remote access to compromised networks.
Change Default File Association To Executable Via Assoc
Detects when a program changes the default file association of any extension to an executable. When a file is opened, the default program used to open the file (also called the file association or handler) is checked. File association selections are stored in the Windows Registry and can be edited by users, administrators, or programs that have Registry access or by administrators using the built-in assoc utility. Applications can modify the file association for a given file extension to call an arbitrary program when a file with the given extension is opened.