Ruben Groenewoud
020fff3aea
* [Rule Tuning] [WIP] Linux DR * Update defense_evasion_binary_copied_to_suspicious_directory.toml * Fixed tag * Added additional tuning * unit test fix * Additional tuning * tuning * added max signals * Added max_signals=1 to brute force rules * Cross-Platform Tuning * Small fix * new_terms conversion * typo * new_terms conversion * Ransomware rule tuning * performance tuning * new_terms conversion for auditd_manager * tune * Need coffee * kql/eql stuff * formatting improvement * new_terms sudo hijacking conversion * exclusion * Deprecations that were added last tuning * Deprecations that were added last tuning * Increased max timespan for brute force rules * version bump * added domain tag * Two tunings * More tuning * Additional tuning * updated_date bump * query optimization * Tuning * Readded the exclusions for this one * Changed int comparison * Some tunings * Update persistence_systemd_scheduled_timer_created.toml * Update rules/linux/privilege_escalation_ld_preload_shared_object_modif.toml Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> * [New Rule] Potential curl CVE-2023-38545 Exploitation * Revert "[New Rule] Potential curl CVE-2023-38545 Exploitation" This reverts commit 9c04d1b53d3d63678289f43ec0c7b617d26f1ce0. * Update rules/cross-platform/command_and_control_non_standard_ssh_port.toml * Update rules/linux/command_and_control_cat_network_activity.toml * Update persistence_message_of_the_day_execution.toml * Changed max_signals * Revert "Merge branch 'main' into rule-tuning-ongoing-dr" This reverts commit 1106b5d2eba1a3529eff325226d6baabfd4b0bf3, reversing changes made to 5ff510757f25b0cb32e1ef18e9e2c34c8ec325a8. * Revertable merge * Update defense_evasion_ld_preload_env_variable_process_injection.toml * File name change --------- Co-authored-by: Isai <59296946+imays11@users.noreply.github.com> Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
71 lines
2.5 KiB
TOML
71 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2021/01/19"
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integration = ["endpoint"]
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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 = "2023/09/22"
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[rule]
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author = ["Elastic"]
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description = """
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Both ~/.bash_profile and ~/.bashrc are files containing shell commands that are run when Bash is invoked. These files
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are executed in a user's context, either interactively or non-interactively, when a user logs in so that their
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environment is set correctly. Adversaries may abuse this to establish persistence by executing malicious content
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triggered by a user’s shell.
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"""
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false_positives = ["Changes to the Shell Profile tend to be noisy, a tuning per your environment will be required."]
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from = "now-9m"
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index = ["logs-endpoint.events.*", "auditbeat-*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Bash Shell Profile Modification"
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references = ["https://www.anomali.com/blog/pulling-linux-rabbit-rabbot-malware-out-of-a-hat"]
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risk_score = 47
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rule_id = "e6c1a552-7776-44ad-ae0f-8746cc07773c"
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severity = "medium"
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tags = ["Domain: Endpoint",
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"OS: macOS",
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"OS: Linux",
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"Use Case: Threat Detection",
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"Tactic: Persistence",
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"Data Source: Elastic Defend"
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]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:file and event.type:change and
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process.name:(* and not (sudo or vim or zsh or env or nano or bash or Terminal or xpcproxy or login or cat or cp or
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launchctl or java or dnf or tailwatchd or ldconfig or yum or semodule or cpanellogd or dockerd or authselect or chmod or
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dnf-automatic or git or dpkg or platform-python)) and
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not process.executable:(/Applications/* or /private/var/folders/* or /usr/local/* or /opt/saltstack/salt/bin/*) and
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file.path:(/private/etc/rc.local or
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/etc/rc.local or
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/home/*/.profile or
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/home/*/.profile1 or
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/home/*/.bash_profile or
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/home/*/.bash_profile1 or
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/home/*/.bashrc or
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/Users/*/.bash_profile or
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/Users/*/.zshenv)
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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 = "T1546"
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name = "Event Triggered Execution"
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reference = "https://attack.mitre.org/techniques/T1546/"
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[[rule.threat.technique.subtechnique]]
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id = "T1546.004"
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name = "Unix Shell Configuration Modification"
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reference = "https://attack.mitre.org/techniques/T1546/004/"
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[rule.threat.tactic]
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id = "TA0003"
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name = "Persistence"
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reference = "https://attack.mitre.org/tactics/TA0003/"
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