Commit Graph

4 Commits

Author SHA1 Message Date
Samirbous 3726611b93 [Tuning] Top Noisy Rules (#5449)
* [Tuning] Windows BruteForce Rules Tuning

#1 Multiple Logon Failure from the same Source Address: converted to ES|QL and raised the threshold to 100 failed auths, alert quality should be better since it aggregates all failed auths info into one alert vs multiple EQL matches. (expected reduction more than 50%)

#2 Privileged Account Brute Force - coverted to ESQL and set the threshold to 50 in a minute. this should drop noise volume by more than 50%.

* ++

* Update execution_shell_evasion_linux_binary.toml

* Update execution_shell_evasion_linux_binary.toml

* Update defense_evasion_indirect_exec_forfiles.toml

* Update lateral_movement_remote_file_copy_hidden_share.toml

* Update lateral_movement_remote_file_copy_hidden_share.toml

* Update persistence_service_windows_service_winlog.toml

* Update credential_access_lsass_openprocess_api.toml

* Update persistence_suspicious_scheduled_task_runtime.toml

* Update impact_hosts_file_modified.toml

* Update defense_evasion_process_termination_followed_by_deletion.toml

* Update rules/windows/credential_access_lsass_openprocess_api.toml

* Update rules/windows/credential_access_bruteforce_admin_account.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update rules/windows/credential_access_lsass_openprocess_api.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update rules/windows/credential_access_bruteforce_multiple_logon_failure_same_srcip.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update credential_access_lsass_openprocess_api.toml

* Update impact_hosts_file_modified.toml

* Update credential_access_dollar_account_relay.toml

* Update credential_access_new_terms_secretsmanager_getsecretvalue.toml

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Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
2025-12-12 14:28:12 +00:00
shashank-elastic e8c54169a4 Prep main for 9.1 (#4555)
* Prep for Release 9.1

* Update Patch Version

* Update Patch version

* Update Patch version
2025-03-26 11:04:14 -04:00
Jonhnathan c0f12ddecf [Rule Tuning] Tighten Up Windows EventLog Indexes, Improve tags (#4464)
* [Rule Tuning] Tighten Up Windows EventLog Indexes, Improve tags

* Format & order

* Update pyproject.toml

* Update credential_access_cookies_chromium_browsers_debugging.toml
2025-02-19 12:54:31 -03:00
Samirbous 8f73b88884 [Tuning / New] Execution of a downloaded windows script (#4434)
* [New] Execution of a downloaded windows script

using 8.15 file events with MOTW info we can focus on js/vbs/wsh/vbe/jse/hta downloaded from internet followed by execution

* Update defense_evasion_posh_assembly_load.toml

* Update execution_powershell_susp_args_via_winscript.toml

* Update guides

* Update defense_evasion_network_connection_from_windows_binary.toml

* Update execution_windows_script_from_internet.toml

* Update execution_windows_script_from_internet.toml

* Update rules/windows/execution_windows_script_from_internet.toml

* Update rules/windows/execution_powershell_susp_args_via_winscript.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update rules/windows/execution_windows_script_from_internet.toml

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* Update execution_windows_script_from_internet.toml

* Create command_and_control_tool_transfer_via_curl.toml

* Update command_and_control_tool_transfer_via_curl.toml

* Update command_and_control_tool_transfer_via_curl.toml

* Update execution_windows_script_from_internet.toml

* Create defense_evasion_indirect_exec_forfiles.toml

* Update execution_windows_script_from_internet.toml

---------

Co-authored-by: Mika Ayenson <Mika.ayenson@elastic.co>
Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
2025-02-03 14:33:59 +00:00