new: msDS-ManagedAccountPrecededByLink Attribute Modified
new: New MsDS-DelegatedManagedServiceAccount (DMSA) Object Created
new: DMSA Service Account Created in Specific OUs - PowerShell
new: DMSA Link Attributes Modified
new: New DMSA Service Account Created in Specific OUs
---------
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
remove: Space After Filename - Logic was incorrect and untested
update: Potential CVE-2024-3400 Exploitation - Palo Alto GlobalProtect OS Command Injection - Update selection
update: JexBoss Command Sequence - Update the selection to use the |all modifier.
chore: remove any usage of the fields field to prepare for deprecation in the spec.
fix: Turla Group Commands May 2020 - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Potential Dtrack RAT Activity - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Potential Data Exfiltration Activity Via CommandLine Tools - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Suspicious Network Command - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Suspicious SYSTEM User Process Creation - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Potential Snatch Ransomware Activity - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Potential Devil Bait Malware Reconnaissance - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Mint Sandstorm - AsperaFaspex Suspicious Process Execution - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
fix: Mint Sandstorm - ManageEngine Suspicious Process Execution - Change the commandline to regex to account for additional spaces when ingesting non XML version of logs from the eventlog.
update: Powershell Token Obfuscation - Powershell - Move to the TH folder in order to set the right FP expectations.
fix: Kerberoasting Activity - Initial Query - Fix issue with filter names and logic
chore: add sorting to the rule archiver script
---------
Thanks: KingKDot
Thanks: zambomarcell
Thanks: Koifman
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
remove: PowerShell DownloadFile - Deprecated in favour of 3b6ab547-8ec2-4991-b9d2-2b06702a48d7
remove: Whoami Utility Execution - Deprecated in favor of 502b42de-4306-40b4-9596-6f590c81f073
fix: Usage Of Web Request Commands And Cmdlets - ScriptBlock - Commented out Net.webclient
fix: Usage Of Web Request Commands And Cmdlets - Comment out Net.webclient
fix: System Disk And Volume Reconnaissance via Wmic.EXE - update the rule logic to remove potential FPs
update: PowerShell Download Pattern - add powershell_ise
update: Use Short Name Path in Image - change detection logic structure
update: Local Accounts Discovery - add OriginalFileName field
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Co-authored-by: nasbench <nasbench@users.noreply.github.com>
update: Suspicious Get Local Groups Information - PowerShell - increase coverage for WMI modules
update: Suspicious Get Local Groups Information - increase coverage for WMI modules
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Co-authored-by: Swachchhanda Shrawan Poudel <87493836+swachchhanda000@users.noreply.github.com>
chore: deprecate rule in favour of c1337eb8-921a-4b59-855b-4ba188ddcc42
chore: update the ref of some rules
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Co-authored-by: frack113 <62423083+frack113@users.noreply.github.com>
new: Suspicious Autorun Registry Modified via WMI
update: Suspicious PowerShell Invocations - Specific - PowerShell Module
update: Suspicious PowerShell Invocations - Specific
update: Potential Persistence Attempt Via Run Keys Using Reg.EXE
update: New RUN Key Pointing to Suspicious Folder
update: Suspicious Powershell In Registry Run Keys
update: Direct Autorun Keys Modification
update: Suspicious Run Key from Download
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Co-authored-by: frack113 <62423083+frack113@users.noreply.github.com>
update: Suspicious Eventlog Clear - Added coverage for eventlog clearing using dotnet class
update: Suspicious Eventlog Clearing or Configuration Change Activity- Added coverage for eventlog clearing using dotnet class
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Co-authored-by: Nasreddine Bencherchali <nasreddineb@splunk.com>
update: Suspicious Non PowerShell WSMAN COM Provider - Update regex to use `\s+` to account for different parsers
update: Renamed Powershell Under Powershell Channel - Update regex to use `\s+` to account for different parsers
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Co-authored-by: Nasreddine Bencherchali <nasreddineb@splunk.com>
update: CodeIntegrity - Unmet Signing Level Requirements By File Under Validation - Add additional filters for third party AV
update: Suspicious Non PowerShell WSMAN COM Provider - Add new filter to cover the edge case where the `HostApplication` field is null
update: Renamed Powershell Under Powershell Channel - Add new filter to cover the edge case where the `HostApplication` field is null
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Co-authored-by: nasbench <8741929+nasbench@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: Powershell Token Obfuscation - Powershell - Changed to not use Lookahead regex
fix: Powershell Token Obfuscation - Process Creation - Changed to not use Lookahead regex
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
fix: Dllhost.EXE Initiated Network Connection To Non-Local IP Address - Filter out additional Microsoft IP block and moved to the threat hunting folder due to large amount of matches based on VT data
fix: Forest Blizzard APT - File Creation Activity - Fix typo in filename
fix: New RUN Key Pointing to Suspicious Folder - Enhance filter to fix new false positive found in testing
new: COM Object Hijacking Via Modification Of Default System CLSID Default Value
new: CVE-2023-1389 Potential Exploitation Attempt - Unauthenticated Command Injection In TP-Link Archer AX21
new: DPAPI Backup Keys And Certificate Export Activity IOC
new: DSInternals Suspicious PowerShell Cmdlets
new: DSInternals Suspicious PowerShell Cmdlets - ScriptBlock
new: HackTool - RemoteKrbRelay Execution
new: HackTool - RemoteKrbRelay SMB Relay Secrets Dump Module Indicators
new: HackTool - SharpDPAPI Execution
new: Hypervisor Enforced Paging Translation Disabled
new: PDF File Created By RegEdit.EXE
new: Periodic Backup For System Registry Hives Enabled
new: Renamed Microsoft Teams Execution
new: Windows LAPS Credential Dump From Entra ID
remove: Potential Persistence Via COM Hijacking From Suspicious Locations - Deprecated because of incorrect logic, replaced by "790317c0-0a36-4a6a-a105-6e576bf99a14"
update: DLL Call by Ordinal Via Rundll32.EXE - Reduced level to "medium" and moved to the threat hunting folder due to the fact that calling by ordinal can be seen by many legitimate utilities. An initial baseline needs to be set for the rule to be promoted.
update: Msiexec.EXE Initiated Network Connection Over HTTP - Reduced level to low and moved to the threat hunting folder due to large amount of matches based on VT data
update: MSSQL Add Account To Sysadmin Role - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL Disable Audit Settings - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL Server Failed Logon - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL Server Failed Logon From External Network - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL SPProcoption Set - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL XPCmdshell Option Change - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: MSSQL XPCmdshell Suspicious Execution - Update the "Provider_Name" to use a contains in order to account for other third party providers.
update: Network Connection Initiated By AddinUtil.EXE - increase level to "high" and promote the status to "test" based on VT data
update: Network Connection Initiated To AzureWebsites.NET By Non-Browser Process - Reduced the level to "medium" and added filters for "null" and empty values based on VT data
update: Office Application Initiated Network Connection Over Uncommon Ports - Add port "143" based on Microsoft "Microsoft 365 URLs and IP address ranges" document
update: Office Application Initiated Network Connection To Non-Local IP - Add "outlook.exe" to the list of processes and filter multiple IP ranges based on Microsoft "Microsoft 365 URLs and IP address ranges" document
update: Password Protected Compressed File Extraction Via 7Zip - Reduced level to "low" and moved to the threat hunting folder due to large amount of matches based on VT data
update: Potential Dead Drop Resolvers - Add filters for "null" and empty values based on VT data
update: Potential Privilege Escalation via Local Kerberos Relay over LDAP - Update metadata information
update: Potential Shellcode Injection - Reduced level to "medium" and moved to the threat hunting folder due multiple FP with third party softwares
update: Potential Suspicious Execution From GUID Like Folder Names - Reduced level to "low" and moved to the threat hunting folder
update: Potentially Suspicious EventLog Recon Activity Using Log Query Utilities - Add additional EventLog and ETW providers to increase coverage
update: Potentially Suspicious Execution From Parent Process In Public Folder - Update logic to add Image names in addition to the previous CommandLines
update: Potentially Suspicious PowerShell Child Processes - Reduced level to "medium" and moved to the threat hunting folder due to large amount of matches based on VT data. As well as the logic doesn't look for anything suspicious but "child processes" that might be "uncommon".
update: Process Execution From A Potentially Suspicious Folder - Update metadata and remove "\Users\Public" to avoid false positives
update: Recon Command Output Piped To Findstr.EXE - Update the logic to user "wildcards" instead of spaces to cover different variants and increase the coverage.
update: Suspicious Electron Application Child Processes - Remove unnecessary filters
update: Suspicious Non-Browser Network Communication With Google API - Add filters for "null" and empty values based on VT data
update: System File Execution Location Anomaly - Enhance filters
update: Uncommon Child Process Of Setres.EXE - Update logic and metadata
update: Uncommon Link.EXE Parent Process - Enhance the filters and metadata
update: Windows Defender Threat Detection Service Disabled - Add french keyword for "stopped" to increase coverage for windows os that uses the french language
---------
Thanks: cY83rR0H1t
Thanks: CTI-Driven
Thanks: BIitzkrieg
Thanks: DFIR-jwedd
Thanks: Snp3r
chore: update Microsoft references link to use the "learn" subdomain instead of "docs".
---------
Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
Thanks: @ryanplasma
Nasreddine Bencherchali