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>
92 lines
2.8 KiB
TOML
Executable File
92 lines
2.8 KiB
TOML
Executable File
[metadata]
|
|
creation_date = "2020/03/25"
|
|
integration = ["endpoint", "windows"]
|
|
maturity = "production"
|
|
min_stack_comments = "Multiple field support in the New Terms rule type was added in Elastic 8.6"
|
|
min_stack_version = "8.6.0"
|
|
updated_date = "2023/10/09"
|
|
|
|
[rule]
|
|
author = ["Elastic"]
|
|
description = """
|
|
An instance of MSBuild, the Microsoft Build Engine, was started by a script or the Windows command interpreter. This
|
|
behavior is unusual and is sometimes used by malicious payloads.
|
|
"""
|
|
false_positives = ["The Build Engine is commonly used by Windows developers but use by non-engineers is unusual."]
|
|
from = "now-9m"
|
|
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
|
|
language = "kuery"
|
|
license = "Elastic License v2"
|
|
name = "Microsoft Build Engine Started by a Script Process"
|
|
risk_score = 21
|
|
rule_id = "9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae2"
|
|
severity = "low"
|
|
tags = ["Domain: Endpoint",
|
|
"OS: Windows",
|
|
"Use Case: Threat Detection",
|
|
"Tactic: Defense Evasion",
|
|
"Tactic: Execution",
|
|
"Data Source: Elastic Defend"
|
|
]
|
|
timestamp_override = "event.ingested"
|
|
type = "new_terms"
|
|
|
|
query = '''
|
|
host.os.type:windows and event.category:process and event.type:start and (
|
|
process.name.caseless:"msbuild.exe" or process.pe.original_file_name:"MSBuild.exe") and
|
|
process.parent.name:("cmd.exe" or "powershell.exe" or "pwsh.exe" or "powershell_ise.exe" or "cscript.exe" or
|
|
"wscript.exe" or "mshta.exe")
|
|
'''
|
|
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1127"
|
|
name = "Trusted Developer Utilities Proxy Execution"
|
|
reference = "https://attack.mitre.org/techniques/T1127/"
|
|
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1127.001"
|
|
name = "MSBuild"
|
|
reference = "https://attack.mitre.org/techniques/T1127/001/"
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0005"
|
|
name = "Defense Evasion"
|
|
reference = "https://attack.mitre.org/tactics/TA0005/"
|
|
[[rule.threat]]
|
|
framework = "MITRE ATT&CK"
|
|
|
|
[[rule.threat.technique]]
|
|
id = "T1059"
|
|
name = "Command and Scripting Interpreter"
|
|
reference = "https://attack.mitre.org/techniques/T1059/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1059.001"
|
|
name = "PowerShell"
|
|
reference = "https://attack.mitre.org/techniques/T1059/001/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1059.003"
|
|
name = "Windows Command Shell"
|
|
reference = "https://attack.mitre.org/techniques/T1059/003/"
|
|
[[rule.threat.technique.subtechnique]]
|
|
id = "T1059.005"
|
|
name = "Visual Basic"
|
|
reference = "https://attack.mitre.org/techniques/T1059/005/"
|
|
|
|
|
|
|
|
[rule.threat.tactic]
|
|
id = "TA0002"
|
|
name = "Execution"
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|
|
|
[rule.new_terms]
|
|
field = "new_terms_fields"
|
|
value = ["host.id", "user.name", "process.command_line"]
|
|
|
|
[[rule.new_terms.history_window_start]]
|
|
field = "history_window_start"
|
|
value = "now-14d"
|