sbousseaden
27262a585b
* Update discovery_adfind_command_activity.toml * Update defense_evasion_adding_the_hidden_file_attribute_with_via_attribexe.toml * Update defense_evasion_clearing_windows_console_history.toml * Update defense_evasion_clearing_windows_event_logs.toml * Update defense_evasion_execution_control_panel_suspicious_args.toml * Update credential_access_dump_registry_hives.toml * Update defense_evasion_delete_volume_usn_journal_with_fsutil.toml * Update impact_deleting_backup_catalogs_with_wbadmin.toml * Update defense_evasion_code_signing_policy_modification_builtin_tools.toml * Update privilege_escalation_uac_bypass_event_viewer.toml * Update privilege_escalation_uac_bypass_mock_windir.toml * Update privilege_escalation_unusual_parentchild_relationship.toml * Update privilege_escalation_unusual_printspooler_childprocess.toml * Update privilege_escalation_uac_bypass_diskcleanup_hijack.toml * Update privilege_escalation_tokenmanip_sedebugpriv_enabled.toml * Update execution_apt_solarwinds_backdoor_child_cmd_powershell.toml * Update defense_evasion_wsl_kalilinux.toml * Update initial_access_suspicious_ms_outlook_child_process.toml * Update initial_access_suspicious_ms_office_child_process.toml * Update initial_access_suspicious_ms_exchange_worker_child_process.toml * Update initial_access_suspicious_ms_exchange_process.toml * Update impact_volume_shadow_copy_deletion_or_resized_via_vssadmin.toml * Update impact_volume_shadow_copy_deletion_via_powershell.toml * Update execution_from_unusual_path_cmdline.toml * Update execution_enumeration_via_wmiprvse.toml * Update execution_command_shell_started_by_svchost.toml * Update discovery_enumerating_domain_trusts_via_nltest.toml * Update discovery_enumerating_domain_trusts_via_dsquery.toml * Update defense_evasion_workfolders_control_execution.toml * Update defense_evasion_iis_httplogging_disabled.toml * Update defense_evasion_enable_inbound_rdp_with_netsh.toml * Update defense_evasion_disabling_windows_logs.toml * Update credential_access_wireless_creds_dumping.toml * Update credential_access_iis_apppoolsa_pwd_appcmd.toml * Update credential_access_iis_connectionstrings_dumping.toml * Update command_and_control_remote_file_copy_desktopimgdownldr.toml * Update command_and_control_remote_file_copy_mpcmdrun.toml * Update command_and_control_dns_tunneling_nslookup.toml * Update persistence_webshell_detection.toml * Update persistence_via_xp_cmdshell_mssql_stored_procedure.toml * Update privilege_escalation_named_pipe_impersonation.toml * Update command_and_control_certreq_postdata.toml * Update defense_evasion_suspicious_certutil_commands.toml * Update defense_evasion_disable_windows_firewall_rules_with_netsh.toml * Update defense_evasion_execution_msbuild_started_unusal_process.toml * Update persistence_system_shells_via_services.toml * Update execution_suspicious_cmd_wmi.toml * Update credential_access_copy_ntds_sam_volshadowcp_cmdline.toml * Update impact_deleting_backup_catalogs_with_wbadmin.toml * Update credential_access_dump_registry_hives.toml * Update defense_evasion_adding_the_hidden_file_attribute_with_via_attribexe.toml * Update defense_evasion_clearing_windows_console_history.toml * Update defense_evasion_clearing_windows_event_logs.toml * Update defense_evasion_code_signing_policy_modification_builtin_tools.toml * Update defense_evasion_delete_volume_usn_journal_with_fsutil.toml * Update defense_evasion_execution_control_panel_suspicious_args.toml * Update execution_apt_solarwinds_backdoor_child_cmd_powershell.toml * Update defense_evasion_wsl_kalilinux.toml * Update discovery_adfind_command_activity.toml * Update initial_access_suspicious_ms_outlook_child_process.toml * Update privilege_escalation_uac_bypass_diskcleanup_hijack.toml * Update privilege_escalation_uac_bypass_event_viewer.toml * Update privilege_escalation_uac_bypass_mock_windir.toml * Update privilege_escalation_unusual_parentchild_relationship.toml * Update privilege_escalation_unusual_printspooler_childprocess.toml * Update defense_evasion_defender_exclusion_via_powershell.toml * Update defense_evasion_execution_lolbas_wuauclt.toml * Update defense_evasion_execution_msbuild_started_by_script.toml * Update defense_evasion_unusual_dir_ads.toml * Update defense_evasion_wsl_child_process.toml * Update defense_evasion_wsl_bash_exec.toml * Update defense_evasion_wsl_enabled_via_dism.toml * Update discovery_admin_recon.toml * Update initial_access_suspicious_ms_exchange_worker_child_process.toml * Update lateral_movement_alternate_creds_pth.toml * Update persistence_via_windows_management_instrumentation_event_subscription.toml * Update persistence_via_telemetrycontroller_scheduledtask_hijack.toml * Update persistence_via_application_shimming.toml * Update defense_evasion_execution_msbuild_started_by_script.toml * Update defense_evasion_execution_msbuild_started_by_script.toml * Update defense_evasion_execution_lolbas_wuauclt.toml * Update defense_evasion_execution_msbuild_started_unusal_process.toml * Update defense_evasion_delete_volume_usn_journal_with_fsutil.toml * Update rules/windows/defense_evasion_execution_msbuild_started_by_script.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * Update impact_volume_shadow_copy_deletion_or_resized_via_vssadmin.toml * Update defense_evasion_clearing_windows_console_history.toml * Update discovery_adfind_command_activity.toml * Update defense_evasion_execution_msbuild_started_unusal_process.toml * Update execution_command_shell_started_by_svchost.toml * Update initial_access_suspicious_ms_exchange_worker_child_process.toml * Update execution_command_shell_started_by_svchost.toml * Update execution_command_shell_started_by_svchost.toml * Update execution_command_shell_started_by_svchost.toml --------- Co-authored-by: Samirbous <64742097+Samirbous@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
61 lines
2.3 KiB
TOML
61 lines
2.3 KiB
TOML
[metadata]
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creation_date = "2020/08/18"
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integration = ["endpoint", "windows", "system"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2024/01/16"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies use of aspnet_regiis to decrypt Microsoft IIS connection strings. An attacker with Microsoft IIS web server
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access via a webshell or alike can decrypt and dump any hardcoded connection strings, such as the MSSQL service account
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password using aspnet_regiis command.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*", "endgame-*", "logs-system.security*"]
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language = "eql"
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license = "Elastic License v2"
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max_signals = 33
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name = "Microsoft IIS Connection Strings Decryption"
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references = [
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"https://blog.netspi.com/decrypting-iis-passwords-to-break-out-of-the-dmz-part-1/",
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"https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/greenbug-espionage-telco-south-asia",
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]
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risk_score = 73
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rule_id = "c25e9c87-95e1-4368-bfab-9fd34cf867ec"
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setup = """
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
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events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
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Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
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`event.ingested` to @timestamp.
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For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
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"""
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severity = "high"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Credential Access", "Data Source: Elastic Endgame", "Data Source: Elastic Defend"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where host.os.type == "windows" and event.type == "start" and
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(process.name : "aspnet_regiis.exe" or ?process.pe.original_file_name == "aspnet_regiis.exe") and
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process.args : "connectionStrings" and process.args : "-pdf"
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1003"
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name = "OS Credential Dumping"
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reference = "https://attack.mitre.org/techniques/T1003/"
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[rule.threat.tactic]
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id = "TA0006"
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name = "Credential Access"
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reference = "https://attack.mitre.org/tactics/TA0006/"
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