Nasreddine Bencherchali
e052677142
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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
58 lines
2.2 KiB
YAML
Executable File
58 lines
2.2 KiB
YAML
Executable File
title: Potential Credential Dumping Activity Via LSASS
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id: 5ef9853e-4d0e-4a70-846f-a9ca37d876da
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status: experimental
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description: |
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Detects process access requests to the LSASS process with specific call trace calls and access masks.
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This behaviour is expressed by many credential dumping tools such as Mimikatz, NanoDump, Invoke-Mimikatz, Procdump and even the Taskmgr dumping feature.
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references:
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- https://blog.menasec.net/2019/02/threat-hunting-21-procdump-or-taskmgr.html
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- https://web.archive.org/web/20230208123920/https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html
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- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.001/T1003.001.md
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- https://research.splunk.com/endpoint/windows_possible_credential_dumping/
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author: Samir Bousseaden, Michael Haag
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date: 2019/04/03
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modified: 2023/12/13
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tags:
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- attack.credential_access
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- attack.t1003.001
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- attack.s0002
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logsource:
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category: process_access
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product: windows
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detection:
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selection:
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TargetImage|endswith: '\lsass.exe'
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GrantedAccess|contains:
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- '0x1000'
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- '0x1038'
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- '0x1438'
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- '0x143a'
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- '0x1fffff' # Too many false positives
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# - '0x01000' # Too many false positives
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# - '0x1010' # Too many false positives
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# - '0x1400' # Too many false positives
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# - '0x1410' # Too many false positives
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# - '0x40' # Too many false positives
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CallTrace|contains:
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- 'dbgcore.dll'
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- 'dbghelp.dll'
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- 'kernel32.dll'
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- 'kernelbase.dll'
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- 'ntdll.dll'
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filter_main_system_user:
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SourceUser|contains: # Covers many language settings
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- 'AUTHORI'
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- 'AUTORI'
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filter_optional_thor:
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CallTrace|contains|all:
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- ':\Windows\Temp\asgard2-agent\'
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- '\thor\thor64.exe+'
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- '|UNKNOWN('
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GrantedAccess: '0x103800'
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filter_optional_sysmon:
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SourceImage|endswith: ':\Windows\Sysmon64.exe'
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condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
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falsepositives:
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- Unknown
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level: medium
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