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SigmaHQ/rules/windows/builtin/win_lsass_access_non_system_account.yml

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OSCD QA wave 1 * Checked all rules against Mordor and EVTX samples datasets * Added field names * Some severity adjustments * Fixes
2020-01-10 23:11:27 +00:00
title: LSASS Access from Non System Account
UUIDs + moved unsupported logic * Added UUIDs to all contributed rules * Moved unsupported logic directory out of rules/ because this breaks CI testing.
2019-12-19 22:56:36 +00:00
id: 962fe167-e48d-4fd6-9974-11e5b9a5d6d1
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
description: Detects potential mimikatz-like tools accessing LSASS from non system account
status: experimental
date: 2019/06/20
fix: lsass access - FPs with AV / EDR software
2021-03-18 08:04:03 +00:00
modified: 2021/03/17
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
author: Roberto Rodriguez @Cyb3rWard0g
references:
Update Threat Hunter Playbook Reference
2021-05-22 03:57:01 +00:00
- https://threathunterplaybook.com/notebooks/windows/06_credential_access/WIN-170105221010.html
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
tags:
- attack.credential_access
att&ck tags review: windows/builtin, windows/driver_load, windows/file_event, windows/image_load, windows/other
2020-08-24 23:09:17 +00:00
- attack.t1003 # an old one
Initial round of subtechnique updates
2020-06-16 20:46:08 +00:00
- attack.t1003.001
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
logsource:
product: windows
service: security
detection:
Initial round of subtechnique updates
2020-06-16 20:46:08 +00:00
selection:
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
EventID:
- 4663
- 4656
fix: condition contains - values without 0x
2021-03-10 17:56:05 +00:00
AccessMask:
fix: FPs with LSASS Access from Non System Account
2021-03-10 17:51:27 +00:00
- '0x40'
- '0x1400'
- '0x1000'
- '0x100000'
- '0x1410' # car.2019-04-004
- '0x1010' # car.2019-04-004
- '0x1438' # car.2019-04-004
- '0x143a' # car.2019-04-004
- '0x1418' # car.2019-04-004
- '0x1f0fff'
- '0x1f1fff'
- '0x1f2fff'
- '0x1f3fff'
fix: condition contains - values without 0x
2021-03-10 17:56:05 +00:00
- '40'
- '1400'
- '1000'
- '100000'
- '1410' # car.2019-04-004
- '1010' # car.2019-04-004
- '1438' # car.2019-04-004
- '143a' # car.2019-04-004
- '1418' # car.2019-04-004
- '1f0fff'
- '1f1fff'
- '1f2fff'
- '1f3fff'
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
ObjectType: 'Process'
ObjectName|endswith: '\lsass.exe'
fix: lsass access - FPs with AV / EDR software
2021-03-18 08:04:03 +00:00
filter1:
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
SubjectUserName|endswith: '$'
fix: lsass access - FPs with AV / EDR software
2021-03-18 08:04:03 +00:00
filter2:
ProcessName|startswith: 'C:\Program Files' # too many false positives with legitimate AV and EDR solutions
condition: selection and not filter1 and not filter2
OSCD QA wave 1 * Checked all rules against Mordor and EVTX samples datasets * Added field names * Some severity adjustments * Fixes
2020-01-10 23:11:27 +00:00
fields:
- ComputerName
- ObjectName
- SubjectUserName
- ProcessName
oscd task #6 done. add 25 new rules: - win_ad_replication_non_machine_account.yml - win_dpapi_domain_backupkey_extraction.yml - win_protected_storage_service_access.yml - win_dpapi_domain_masterkey_backup_attempt.yml - win_sam_registry_hive_handle_request.yml - win_sam_registry_hive_dump_via_reg_utility.yml - win_lsass_access_non_system_account.yml - win_ad_object_writedac_access.yml - powershell_alternate_powershell_hosts.yml - sysmon_remote_powershell_session_network.yml - win_remote_powershell_session.yml - win_scm_database_handle_failure.yml - win_scm_database_privileged_operation.yml - sysmon_wmi_module_load.yml - sysmon_remote_powershell_session_process.yml - sysmon_rdp_registry_modification.yml - sysmon_powershell_execution_pipe.yml - sysmon_alternate_powershell_hosts_pipe.yml - sysmon_powershell_execution_moduleload.yml - sysmon_createremotethread_loadlibrary.yml - sysmon_alternate_powershell_hosts_moduleload.yml - powershell_remote_powershell_session.yml - win_non_interactive_powershell.yml - win_syskey_registry_access.yml - win_wmiprvse_spawning_process.yml improve 1 rule: - rules/windows/builtin/win_account_backdoor_dcsync_rights.yml
2019-11-10 15:43:41 +00:00
falsepositives:
- Unknown
OSCD QA wave 1 * Checked all rules against Mordor and EVTX samples datasets * Added field names * Some severity adjustments * Fixes
2020-01-10 23:11:27 +00:00
level: critical
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