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>
81 lines
2.9 KiB
TOML
81 lines
2.9 KiB
TOML
[metadata]
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creation_date = "2023/01/13"
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integration = ["endpoint", "windows", "system"]
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maturity = "production"
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updated_date = "2024/01/16"
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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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[rule]
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author = ["Elastic"]
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description = """
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Detects Linux Bash commands from the the Windows Subsystem for Linux. Adversaries may enable
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and use WSL for Linux to avoid detection.
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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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name = "Suspicious Execution via Windows Subsystem for Linux"
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references = [
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"https://blog.f-secure.com/hunting-for-windows-subsystem-for-linux/",
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"https://lolbas-project.github.io/lolbas/OtherMSBinaries/Wsl/",
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"https://blog.qualys.com/vulnerabilities-threat-research/2022/03/22/implications-of-windows-subsystem-for-linux-for-adversaries-defenders-part-1"
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]
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risk_score = 21
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rule_id = "3e0eeb75-16e8-4f2f-9826-62461ca128b7"
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severity = "low"
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tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Execution", "Tactic: Defense Evasion", "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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(
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(
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(process.executable : "?:\\Windows\\System32\\bash.exe" or ?process.pe.original_file_name == "Bash.exe") and
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not process.command_line : ("bash", "bash.exe")
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) or
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process.executable : "?:\\Users\\*\\AppData\\Local\\Packages\\*\\rootfs\\usr\\bin\\bash" or
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(
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process.parent.name : "wsl.exe" and ?process.parent.command_line : "bash*" and not process.name : "wslhost.exe"
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) or
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(
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process.name : "wsl.exe" and process.args : (
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"curl", "/etc/shadow", "/etc/passwd", "cat", "--system", "root", "-e", "--exec", "bash", "/mnt/c/*"
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) and not process.args : ("wsl-bootstrap", "docker-desktop-data", "*.vscode-server*")
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)
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) and
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not process.parent.executable : ("?:\\Program Files\\Docker\\*.exe", "?:\\Program Files (x86)\\Docker\\*.exe")
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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 = "T1202"
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name = "Indirect Command Execution"
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reference = "https://attack.mitre.org/techniques/T1202/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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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 = "T1059"
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name = "Command and Scripting Interpreter"
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reference = "https://attack.mitre.org/techniques/T1059/"
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[[rule.threat.technique.subtechnique]]
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id = "T1059.004"
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name = "Unix Shell"
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reference = "https://attack.mitre.org/techniques/T1059/004/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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