fix: Suspicious Sysmon as Execution Parent - add filter for Sysmon binary running from temp dir
fix: Remote Thread Created In Shell Application - modify the logic to filter out legit processes creating remote thread in shell apps
fix: Potential Active Directory Reconnaissance/Enumeration Via LDAP - commenting out troublesome LDAP query parameter
fix: Rare Remote Thread Creation By Uncommon Source Image - add several FP filter
fix: Remote Thread Creation By Uncommon Source Image - add several FP filter
fix: ADS Zone.Identifier Deleted By Uncommon Application - filter msedge
fix: Remote Thread Creation In Uncommon Target Image - add FP filters for notepad and sethc
fix: Potential Binary Or Script Dropper Via PowerShell - add filters for legitimate binary dropped by PowerShell
fix: Use Short Name Path in Command Line - add filter for aurora
fix: Suspicious Userinit Child Process - filter null Image
fix: CurrentVersion NT Autorun Keys Modification - add filter for RuntimeBroker.exe
fix: Modification of IE Registry Settings - add filter for RuntimeBroker.exe
fix: Scheduled TaskCache Change by Uncommon Program - add filter for RuntimeBroker.exe
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
fix: Uncommon AppX Package Locations - add a new filter to reduce noise
fix: Rare Remote Thread Creation By Uncommon Source Image - add new filters to reduce noise
fix: Remote Thread Creation By Uncommon Source Image - add new filters to reduce noise
update: Remote Thread Created In Shell Application - move to threat-hunting folder as it causes too much noise
---------
Co-authored-by: nasbench <nasbench@users.noreply.github.com>
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
chore: change tags, date, modified fields to comply with v2 of the Sigma spec.
chore: update the related type from `obsoletes` to `obsolete`.
chore: update local json schema to the latest version.
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>
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
fix: Bad Opsec Defaults Sacrificial Processes With Improper Arguments - Enhance filter to account for an FP found with MS edge
fix: Files With System Process Name In Unsuspected Locations - Enhance filter to cover other folder variation for windows recovery
fix: Portable Gpg.EXE Execution - Add new legitimate location for GNuGpg
fix: Suspicious WmiPrvSE Child Process - Add a filter for msiexec image used to install new MSI packages via WMI process
update: ISO Image Mounted - Update title and add new filter
update: Potential NT API Stub Patching - Enhance the selection coverage by removing the "C:" prefix to cover other installation possibilities
update: Remote Thread Creation Via PowerShell - Update selection to use endswith modifier for better coverage
update: Remote Thread Creation Via PowerShell In Potentially Suspicious Target - Update title and add a "regsvr32" as a new additional process to increase coverage
update: Suspicious Whoami.EXE Execution - Enhance the selection by using a * wildcard to account for the order and avoid FPs
update: WMI Module Loaded By Non Uncommon Process - Enhance selection by making the System folders filter use a "contains" instead of an exact match
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
new: Lazarus APT DLL Sideloading Activity
new: File Download From IP Based URL Via CertOC.EXE
new: File Download From IP URL Via Curl.EXE
update: Remote Thread Creation By Uncommon Source Image
update: Remote Thread Creation In Uncommon Target Image
update: ADSI-Cache File Creation By Uncommon Tool
update: Files With System Process Name In Unsuspected Locations
update: PowerShell Module File Created By Non-PowerShell Process
update: PSScriptPolicyTest Creation By Uncommon Process
update: Suspicious LNK Double Extension File Created
update: PowerShell Profile Modification
update: Alternate PowerShell Hosts Pipe
update: File Download via CertOC.EXE
update: Suspicious File Download From IP Via Curl.EXE
update: Arbitrary File Download Via GfxDownloadWrapper.EXE
update: Potentially Suspicious Office Document Executed From Trusted Location
---------
Co-authored-by: phantinuss <79651203+phantinuss@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>
Nasreddine Bencherchali