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>
128 lines
5.0 KiB
TOML
128 lines
5.0 KiB
TOML
[metadata]
|
|
creation_date = "2023/06/09"
|
|
integration = ["endpoint"]
|
|
maturity = "production"
|
|
min_stack_comments = "New fields added: required_fields, related_integrations, setup, New Term"
|
|
min_stack_version = "8.6.0"
|
|
updated_date = "2023/10/16"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
Systemd service files are configuration files in Linux systems used to define and manage system services. Malicious
|
|
actors can leverage systemd service files to achieve persistence by creating or modifying service files to execute
|
|
malicious commands or payloads during system startup. This allows them to maintain unauthorized access, execute
|
|
additional malicious activities, or evade detection.
|
|
"""
|
|
from = "now-9m"
|
|
index = ["logs-endpoint.events.*", "endgame-*"]
|
|
language = "kuery"
|
|
license = "Elastic License v2"
|
|
name = "New Systemd Service Created by Previously Unknown Process"
|
|
references = [
|
|
"https://opensource.com/article/20/7/systemd-timers",
|
|
"https://pberba.github.io/security/2022/01/30/linux-threat-hunting-for-persistence-systemd-timers-cron/"
|
|
]
|
|
risk_score = 47
|
|
rule_id = "17b0a495-4d9f-414c-8ad0-92f018b8e001"
|
|
setup = """
|
|
|
|
This rule requires data coming in from Elastic Defend.
|
|
|
|
### Elastic Defend Integration Setup
|
|
Elastic Defend is integrated into the Elastic Agent using Fleet. Upon configuration, the integration allows
|
|
the Elastic Agent to monitor events on your host and send data to the Elastic Security app.
|
|
|
|
#### Prerequisite Requirements:
|
|
- Fleet is required for Elastic Defend.
|
|
- To configure Fleet Server refer to the [documentation](https://www.elastic.co/guide/en/fleet/current/fleet-server.html).
|
|
|
|
#### The following steps should be executed in order to add the Elastic Defend integration on a Linux System:
|
|
- Go to the Kibana home page and click Add integrations.
|
|
- In the query bar, search for Elastic Defend and select the integration to see more details about it.
|
|
- Click Add Elastic Defend.
|
|
- Configure the integration name and optionally add a description.
|
|
- Select the type of environment you want to protect, either Traditional Endpoints or Cloud Workloads.
|
|
- Select a configuration preset. Each preset comes with different default settings for Elastic Agent, you can further customize these later by configuring the Elastic Defend integration policy. [Helper guide](https://www.elastic.co/guide/en/security/current/configure-endpoint-integration-policy.html).
|
|
- We suggest to select "Complete EDR (Endpoint Detection and Response)" as a configuration setting, that provides "All events; all preventions"
|
|
- Enter a name for the agent policy in New agent policy name. If other agent policies already exist, you can click the Existing hosts tab and select an existing policy instead.
|
|
For more details on Elastic Agent configuration settings, refer to the [helper guide](https://www.elastic.co/guide/en/fleet/8.10/agent-policy.html).
|
|
- Click Save and Continue.
|
|
- To complete the integration, select Add Elastic Agent to your hosts and continue to the next section to install the Elastic Agent on your hosts.
|
|
For more details on Elastic Defend refer to the [helper guide](https://www.elastic.co/guide/en/security/current/install-endpoint.html).
|
|
|
|
"""
|
|
severity = "medium"
|
|
tags = [
|
|
"Domain: Endpoint",
|
|
"OS: Linux",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Persistence",
|
|
"Tactic: Privilege Escalation",
|
|
"Data Source: Elastic Endgame",
|
|
"Data Source: Elastic Defend"
|
|
]
|
|
timestamp_override = "event.ingested"
|
|
type = "new_terms"
|
|
|
|
query = '''
|
|
host.os.type:linux and event.category:file and event.action:("creation" or "file_create_event") and file.path:(
|
|
/etc/systemd/system/* or
|
|
/usr/local/lib/systemd/system/* or
|
|
/lib/systemd/system/* or
|
|
/usr/lib/systemd/system/* or
|
|
/home/*/.config/systemd/user/*
|
|
) and
|
|
not (
|
|
process.name:(
|
|
"dpkg" or "dockerd" or "rpm" or "snapd" or "yum" or "exe" or "dnf" or "dnf-automatic" or python* or "puppetd" or
|
|
"elastic-agent" or "cinc-client" or "chef-client" or "pacman" or "puppet" or "cloudflared"
|
|
) or
|
|
file.extension:("swp" or "swpx")
|
|
)
|
|
'''
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1543"
|
|
name = "Create or Modify System Process"
|
|
reference = "https://attack.mitre.org/techniques/T1543/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1543.002"
|
|
name = "Systemd Service"
|
|
reference = "https://attack.mitre.org/techniques/T1543/002/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0003"
|
|
name = "Persistence"
|
|
reference = "https://attack.mitre.org/tactics/TA0003/"
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1543"
|
|
name = "Create or Modify System Process"
|
|
reference = "https://attack.mitre.org/techniques/T1543/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1543.002"
|
|
name = "Systemd Service"
|
|
reference = "https://attack.mitre.org/techniques/T1543/002/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0004"
|
|
name = "Privilege Escalation"
|
|
reference = "https://attack.mitre.org/tactics/TA0004/"
|
|
|
|
[rule.new_terms]
|
|
field = "new_terms_fields"
|
|
value = ["host.id", "file.path", "process.executable"]
|
|
|
|
[[rule.new_terms.history_window_start]]
|
|
field = "history_window_start"
|
|
value = "now-10d"
|