fix: Firewall Rule Modified In The Windows Firewall Exception List - new optional filter Brave browser
fix: Outbound RDP Connections Over Non-Standard Tools - new FP filter for RAS TSplus
fix: PowerShell Core DLL Loaded By Non PowerShell Process - new optional filter for chocolatey
fix: Remote Thread Creation In Mstsc.Exe From Suspicious Location - Fix a broken path string
fix: Remote Thread Creation In Uncommon Target Image - Reduce level to medium and remove explorer as target due to FP rates.
fix: Uncommon New Firewall Rule Added In Windows Firewall Exception List - Fix the filters to be more generic
new: Rare Remote Thread Creation By Uncommon Source Image - A split of 66d31e5f-52d6-40a4-9615-002d3789a119
update: All Rules Have Been Deleted From The Windows Firewall Configuration - Remove program files filter to increase coverage. As deleting rules shouldn't be a "normal" behavior.
update: CreateRemoteThread API and LoadLibrary - Reduce level to medium and convert to a TH rule
update: New Firewall Rule Added In Windows Firewall Exception List For Potential Suspicious Application - Add additional paths to increase coverage
update: Powershell Install a DLL in System Directory - enhance rule context in big script blocks
update: Remote Thread Creation By Uncommon Source Image - Reduced level to medium and move high indicators to 02d1d718-dd13-41af-989d-ea85c7fab93f
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
update: Network Communication With Crypto Mining Pool - new domains from `miningocean.org`
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
fix: Access To Windows Credential History File By Uncommon Application - Enhance FP filters
fix: Access To Windows DPAPI Master Keys By Uncommon Application - Enhance FP filters
fix: Amsi.DLL Load By Uncommon Process - Moved to threat hunting folder and update false positive filters to remove hardcoded C:
fix: Bad Opsec Defaults Sacrificial Processes With Improper Arguments - Typo in condition
fix: Credential Manager Access By Uncommon Application - Enhance FP filters
fix: Elevated System Shell Spawned From Uncommon Parent Location - Enhance FP filters
fix: Execution of Suspicious File Type Extension - Add new extensions to reduce FP
fix: Important Windows Eventlog Cleared - Update selection to remove "Application" log as it was generating a lot of FP in some environments
fix: Malicious PowerShell Commandlets - ScriptBlock - Remove some part of the selection due to FP matches as they were generic cmdlet names
fix: Potential Direct Syscall of NtOpenProcess - Add "Adobe" filter
fix: Potential Shim Database Persistence via Sdbinst.EXE - Update FP filter for "iisexpressshim" sdb
fix: Potentially Suspicious AccessMask Requested From LSASS - Add new FP filter for "procmon" process
fix: PowerView PowerShell Cmdlets - ScriptBlock - Remove some part of the selection due to FP matches as they were generic cmdlet names
fix: PSScriptPolicyTest Creation By Uncommon Process - Add new filter for "sdiagnhost"
fix: Relevant Anti-Virus Signature Keywords In Application Log - Update false positive filters
fix: Remote Access Tool Services Have Been Installed - Security - Fix typo in field name
fix: Suspicious File Creation Activity From Fake Recycle.Bin Folder - Remove RECYCLE.BIN\ as it was added as a typo and is a legitimate location.
fix: Uncommon Child Process Of Conhost.EXE - Add new FP filters
fix: Uncommon File Created In Office Startup Folder - Add new extension to filter out FP generated with MS Access databases
fix: Uncommon PowerShell Hosts - Moved to threat hunting folder and updated false positive filter list
fix: Use Of Remove-Item to Delete File - ScriptBlock - Moved to threat hunting folder and Update logic to be more accurate
fix: User with Privileges Logon - Move to placeholder rules and update the FP filter to account for different workstations
fix: Windows Event Auditing Disabled - Enhance list of false positive filters with additional GUID
fix: WMI Module Loaded By Uncommon Process - Moved to threat hunting folder and update and restructure false positive filters
new: Communication To Uncommon Destination Ports
new: Potentially Suspicious Execution Of Regasm/Regsvcs With Uncommon Extension
remove: Credential Dumping Tools Service Execution
remove: New Service Uses Double Ampersand in Path
remove: Powershell File and Directory Discovery
remove: PowerShell Scripts Run by a Services
remove: Security Event Log Cleared
remove: Suspicious Get-WmiObject
remove: Windows Defender Threat Detection Disabled
update: Access To Browser Credential Files By Uncommon Application - Increase level to medium and enhance filters and selections
update: Add Potential Suspicious New Download Source To Winget - Reduce level to medium
update: ADFS Database Named Pipe Connection By Uncommon Tool - Enhance coverage by improving paths selection
update: CodeIntegrity - Unmet Signing Level Requirements By File Under Validation - Reduce level to low
update: Copy From Or To Admin Share Or Sysvol Folder - Enhance selection to be more accurate
update: Eventlog Cleared - Update FP filter to remove "Application" log and increase coverage
update: Failed Code Integrity Checks - Reduce level to informational
update: HH.EXE Execution - Reduce level to low
update: Locked Workstation - Reduce level to informational
update: Malicious Driver Load By Name - Increase coverage based on LOLDrivers data
update: Meterpreter or Cobalt Strike Getsystem Service Installation - Security - Reduce level to high and restructure selections
update: Meterpreter or Cobalt Strike Getsystem Service Installation - System - Reduce level to high and restructure selections
update: Potential Credential Dumping Activity Via LSASS - Reduce level to medium and comment out noisy access masks
update: Potential PowerShell Execution Policy Tampering - Remove "RemoteSigned" as it doesn't fit with the current logic
update: Potentially Suspicious Execution Of Regasm/Regsvcs From Uncommon Location - Reduce level to medium and update logic
update: Potentially Suspicious Malware Callback Communication - Increase coverage by adding new additional ports
update: PUA - Nmap/Zenmap Execution - Reduce level to medium
update: PUA - Process Hacker Execution - Reduce level to medium
update: PUA - Radmin Viewer Utility Execution - Reduce level to medium
update: Rundll32 Execution With Uncommon DLL Extension - Enhance DLL extension list
update: SASS Access From Non System Account - Reduce level to medium and enhance false positive filters
update: Suspicious Executable File Creation - Enhance coverage by removing hardocded "C:"
update: Suspicious Program Location with Network Connections - Increase accuracy by enhancing the selection to focus on the start of the folder and partition
update: Suspicious Schtasks From Env Var Folder - Reduce level to medium
update: Suspicious Shim Database Patching Activity - Add new processes to increase coverage
update: Uncommon Extension Shim Database Installation Via Sdbinst.EXE - Reduce level to medium
update: Whoami Utility Execution - Reduce level to low
update: Whoami.EXE Execution With Output Option - Reduce level to medium
update: Windows Defender Malware Detection History Deletion - Reduce level to informational
update: WMI Event Consumer Created Named Pipe - Reduce leve to medium
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Thanks: @Blackmore-Robert
Thanks: @swachchhanda000
Thanks: @celalettin-turgut
Thanks: @AaronS97
fix: Suspicious Office Outbound Connections - Enhanced the filter by adding new ports that cause FP with SMTP and IMAP communications
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
update: Suspicious Network Connection to IP Lookup Service APIs - add several external IP lookup services to existing list
update: Suspicious DNS Query for IP Lookup Service APIs - add several external IP lookup services to existing list
---------
Co-authored-by: Nasreddine Bencherchali <8741929+nasbench@users.noreply.github.com>
new: DNS Query To Devtunnels Domain - Split rule based on b3e6418f-7c7a-4fad-993a-93b65027a9f1
new: Network Connection Initiated To DevTunnels Domain
new: Network Connection Initiated To Visual Studio Code Tunnels Domain
update: DNS Query To Visual Studio Code Tunnels Domain - Update the rule to only focus on DNS requests from Vscode tunnels and move the logic of Devtunnels to another rule. To ease FP management for users that leverage one but not the other.
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
remove: Abusing Findstr for Defense Evasion - Deprecate in favour of 2 splitted rules. 587254ee-a24b-4335-b3cd-065c0f1f4baa and 04936b66-3915-43ad-a8e5-809eadfd1141
remove: Windows Update Client LOLBIN - Deprecate in favour of 52d097e2-063e-4c9c-8fbb-855c8948d135
fix: Remote Thread Creation By Uncommon Source Image - Enhance filters to avoid false positives
fix: Suspicious Shim Database Installation via Sdbinst.EXE - Add "null" and "empty" filters to account for cases where the CLI is null or empty
new: Insenstive Subfolder Search Via Findstr.EXE
new: Remote File Download Via Findstr.EXE
new: Windows Defender Exclusion Deleted
new: Windows Defender Exclusion List Modified
new: Windows Defender Exclusion Reigstry Key - Write Access Requested
update: Renamed Office Binary Execution - Add new binaries and filters to increase coverage and tune FPs
update: EVTX Created In Uncommon Location - Enhance filters to cover other drives other than "C:"
update: Findstr GPP Passwords - Add "find.exe" binary to increase coverage
update: Findstr Launching .lnk File - Add "find.exe" binary to increase coverage
update: LSASS Process Reconnaissance Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Non-DLL Extension File Renamed With DLL Extension - Update title and logic
update: Permission Misconfiguration Reconnaissance Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Potentially Suspicious Wuauclt Network Connection - Change the logic to use the "CommandLine" field in order to avoid false positives
update: Proxy Execution Via Wuauclt.EXE - Update title and enhance filters
update: Recon Command Output Piped To Findstr.EXE - Add "find.exe" binary to increase coverage
update: Security Tools Keyword Lookup Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Suspicious Appended Extension - Enhance list of extension
update: Sysmon Discovery Via Default Driver Altitude Using Findstr.EXE - Add "find.exe" binary to increase coverage
fix: Uncommon Userinit Child Process - Add the citrix process cmstart to the filtered processes and make it more strict to avoid abuse. Also enhances the other filters by removing the C: notation.
fix: Bad Opsec Defaults Sacrificial Processes With Improper Arguments - Add FP filter for chrome installer spawning rundll32 without arguments
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
thanks: @vj-codes for #4554
thanks: @mezzofix for #4520
thanks: @rkmbaxed for #4566 and #4569
thanks: @celalettin-turgut for #4570
remove: Abusing Findstr for Defense Evasion - Deprecate in favour of 2 splitted rules. 587254ee-a24b-4335-b3cd-065c0f1f4baa and 04936b66-3915-43ad-a8e5-809eadfd1141
remove: Windows Update Client LOLBIN - Deprecate in favour of 52d097e2-063e-4c9c-8fbb-855c8948d135
fix: Remote Thread Creation By Uncommon Source Image - Enhance filters to avoid false positives
fix: Suspicious Shim Database Installation via Sdbinst.EXE - Add "null" and "empty" filters to account for cases where the CLI is null or empty
new: Insenstive Subfolder Search Via Findstr.EXE
new: Remote File Download Via Findstr.EXE
new: Windows Defender Exclusion Deleted
new: Windows Defender Exclusion List Modified
new: Windows Defender Exclusion Reigstry Key - Write Access Requested
update: Renamed Office Binary Execution - Add new binaries and filters to increase coverage and tune FPs
update: EVTX Created In Uncommon Location - Enhance filters to cover other drives other than "C:"
update: Findstr GPP Passwords - Add "find.exe" binary to increase coverage
update: Findstr Launching .lnk File - Add "find.exe" binary to increase coverage
update: LSASS Process Reconnaissance Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Non-DLL Extension File Renamed With DLL Extension - Update title and logic
update: Permission Misconfiguration Reconnaissance Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Potentially Suspicious Wuauclt Network Connection - Change the logic to use the "CommandLine" field in order to avoid false positives
update: Proxy Execution Via Wuauclt.EXE - Update title and enhance filters
update: Recon Command Output Piped To Findstr.EXE - Add "find.exe" binary to increase coverage
update: Security Tools Keyword Lookup Via Findstr.EXE - Add "find.exe" binary to increase coverage
update: Suspicious Appended Extension - Enhance list of extension
update: Sysmon Discovery Via Default Driver Altitude Using Findstr.EXE - Add "find.exe" binary to increase coverage
fix: Uncommon Userinit Child Process - Add the citrix process cmstart to the filtered processes and make it more strict to avoid abuse. Also enhances the other filters by removing the C: notation.
fix: Bad Opsec Defaults Sacrificial Processes With Improper Arguments - Add FP filter for chrome installer spawning rundll32 without arguments
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
thanks: @vj-codes for #4554
thanks: @mezzofix for #4520
thanks: @rkmbaxed for #4566 and #4569
thanks: @celalettin-turgut for #4570
new: Arbitrary File Download Via IMEWDBLD.EXE
new: Arbitrary File Download Via MSEDGE_PROXY.EXE
new: Arbitrary File Download Via Squirrel.EXE - This is a split rule from "45239e6a-b035-4aaf-b339-8ad379fcb67e"
new: Msxsl.EXE Execution
new: Potential File Download Via MS-AppInstaller Protocol Handler
new: Remote XSL Execution Via Msxsl.EXE
update: AppX Package Installation Attempts Via AppInstaller.EXE - Update description and title
update: Arbitrary File Download Via MSOHTMED.EXE - Update title
update: Arbitrary File Download Via PresentationHost.EXE - Update title
update: File Download And Execution Via IEExec.EXE - Update title and description
update: File Download From Browser Process Via Inline URL - Enhance accuracy by using the "endswith" modifier and incrasing coverage by adding new extensions to the list
update: File Download Using ProtocolHandler.exe - Update logic by removing unecessary the "selection_cli_1"
update: File Download Via InstallUtil.EXE - Update title and description
update: File Download Via Windows Defender MpCmpRun.EXE - Update metadata information and add additional fields to the image selection
update: Network Connection Initiated By IMEWDBLD.EXE - Update description and title
update: Potentially Suspicious Electron Application CommandLine - Add "msedge_proxy.exe" to list of processes
update: Process Proxy Execution Via Squirrel.EXE - Moved the logic that covers the "download" aspect into a new rule "1e75c1cc-c5d4-42aa-ac3d-91b0b68b3b4c"
update: Suspicious Calculator Usage - Update filter to remove the "C:" prefix, which increase coverage of other partitions
update: Uncommon Child Process Of Appvlp.EXE - Update description, title and enahnce false positives filters
update: XBAP Execution From Uncommon Locations Via PresentationHost.EXE - Update title and description
update: XSL Script Execution Via WMIC.EXE - Removed the selection that covers "Msxsl" and moved to a seperate rules "9e50a8b3-dd05-4eb8-9153-bdb6b79d50b0"
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
update: Registry Persistence via Service in Safe Mode - Fix typo in title
chore: Fix multiple typo in metadata fields and comments
---------
Co-authored-by: Nasreddine Bencherchali <8741929+nasbench@users.noreply.github.com>
new: Application Terminated Via Wmic.EXE
new: Browser Execution In Headless Mode
new: Chromium Browser Headless Execution To Mockbin Like Site
new: DarkGate User Created Via Net.EXE
new: DMP/HDMP File Creation
new: Malicious Driver Load
new: Malicious Driver Load By Name
new: Potentially Suspicious DMP/HDMP File Creation
new: Remote DLL Load Via Rundll32.EXE
new: Renamed CURL.EXE Execution
new: Vulnerable Driver Load
new: Vulnerable Driver Load By Name
update: 7Zip Compressing Dump Files - Increase coverage
update: Amsi.DLL Loaded Via LOLBIN Process - Reduce level to `medium`
update: COM Hijack via Sdclt - Fix Logic
update: Copy .DMP/.DUMP Files From Remote Share Via Cmd.EXE - Increase coverage
update: Creation of an Executable by an Executable - Fix FP
update: DLL Load By System Process From Suspicious Locations - Reduce level to `medium`
update: DNS Query Request By Regsvr32.EXE - Reduce level to `medium`
update: DNS Query To MEGA Hosting Website - DNS Client - Update title and reduce level to `medium`
update: DNS Query To MEGA Hosting Website - Reduce level to `low` and update metadata
update: DNS Query To Remote Access Software Domain From Non-Browser App - Increase coverage with new domains
update: DNS Query To Ufile.io - DNS Client - Update title and reduce level to `low`
update: DNS Query To Ufile.io - Update title and reduce level to `low`
update: DNS Query Tor .Onion Address - Sysmon - Update title
update: DNS Server Discovery Via LDAP Query - Reduce level to `low` and update FP filters
update: DriverQuery.EXE Execution - Increase coverage
update: File Download From Browser Process Via Inline Link
update: Greedy File Deletion Using Del - Increase coverage
update: Leviathan Registry Key Activity - Fix logic
update: Network Connection Initiated By Regsvr32.EXE - Reduce level to `medium` and metadata update
update: Non Interactive PowerShell Process Spawned - Increase coverage
update: OceanLotus Registry Activity - Fix Logic
update: Office Application Startup - Office Test - Fix Logic
update: OneNote Attachment File Dropped In Suspicious Location - Fix FP
update: Potential Dead Drop Resolvers - Increase coverage with new domains
update: Potential Persistence Via COM Hijacking From Suspicious Locations - Increase coverage and fix logic
update: Potential Persistence Via COM Search Order Hijacking - Fix Logic
update: Potential Process Hollowing Activity - Update FP filters
update: Potential Recon Activity Using DriverQuery.EXE - Increase coverage
update: Potential Unquoted Service Path Reconnaissance Via Wmic.EXE - Reduce level to `medium`
update: Potentially Suspicious Event Viewer Child Process - Update metadata
update: PowerShell Initiated Network Connection - Update description
update: PowerShell Module File Created By Non-PowerShell Process - Fix FP
update: PsExec Tool Execution From Suspicious Locations - PipeName - Reduce level to `medium`
update: Python Image Load By Non-Python Process - Update description and title
update: Python Initiated Connection - Update FP filter
update: Remote Thread Creation By Uncommon Source Image - Update FP filter
update: Renamed AutoIt Execution - Increase coverage
update: Suspicious Chromium Browser Instance Executed With Custom Extensions - Increase coverage
update: Suspicious WebDav Client Execution Via Rundll32.EXE - New Title
update: Sysinternals Tools AppX Versions Execution - Reduce level to `low`
update: Sysmon Blocked Executable - Update logsource
update: UAC Bypass via Event Viewer - Fix Logic
update: UNC2452 Process Creation Patterns - Fix logic
update: Usage Of Malicious POORTRY Signed Driver - Deprecated
update: Vulnerable AVAST Anti Rootkit Driver Load - Deprecated
update: Vulnerable Dell BIOS Update Driver Load - Deprecated
update: Vulnerable Driver Load By Name - Deprecated
update: Vulnerable GIGABYTE Driver Load - Deprecated
update: Vulnerable HW Driver Load - Deprecated
update: Vulnerable Lenovo Driver Load - Deprecated
update: WebDav Client Execution Via Rundll32.EXE
update: Windows Update Error - Reduce level to `informational` and status to `stable`
update: Winrar Compressing Dump Files - Increase Coverage
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
fix: Potential Dead Drop Resolvers - FP with chrome/FF being installed in appdata
fix: Suspicious Elevated System Shell - update FP for improved script that causes a FP
phantinuss