Jonhnathan
7b1215ccf1
* [Rule Tuning] Windows DR Tuning - 8 * Update rules/windows/defense_evasion_unusual_system_vp_child_program.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> * Update rules/windows/defense_evasion_via_filter_manager.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> * Update rules/windows/defense_evasion_via_filter_manager.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> --------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
74 lines
2.5 KiB
TOML
74 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2023/01/17"
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integration = ["windows"]
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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 = "2023/12/18"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies modification of a file creation time. Adversaries may modify file time attributes to blend
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malicious content with existing files. Timestomping is a technique that modifies the timestamps of
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a file often to mimic files that are in trusted directories.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "File Creation Time Changed"
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risk_score = 47
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rule_id = "166727ab-6768-4e26-b80c-948b228ffc06"
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severity = "medium"
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tags = [
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"Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Defense Evasion"
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]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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file where host.os.type == "windows" and event.code : "2" and
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/* Requires Sysmon EventID 2 - File creation time change */
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event.action : "File creation time changed*" and
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not process.executable :
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("?:\\Program Files\\*",
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"?:\\Program Files (x86)\\*",
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"?:\\Windows\\system32\\cleanmgr.exe",
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"?:\\Windows\\system32\\msiexec.exe",
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"?:\\Windows\\syswow64\\msiexec.exe",
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"?:\\Windows\\system32\\svchost.exe",
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"?:\\WINDOWS\\system32\\backgroundTaskHost.exe",
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"?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
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"?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
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"?:\\Users\\*\\AppData\\Local\\slack\\app-*\\slack.exe",
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"?:\\Users\\*\\AppData\\Local\\GitHubDesktop\\app-*\\GitHubDesktop.exe",
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"?:\\Users\\*\\AppData\\Local\\Microsoft\\Teams\\current\\Teams.exe",
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"?:\\Users\\*\\AppData\\Local\\Microsoft\\OneDrive\\OneDrive.exe") and
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not file.extension : ("temp", "tmp", "~tmp", "xml", "newcfg") and not user.name : ("SYSTEM", "Local Service", "Network Service") and
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not file.name : ("LOG", "temp-index", "license.rtf", "iconcache_*.db")
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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 = "T1070"
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name = "Indicator Removal"
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reference = "https://attack.mitre.org/techniques/T1070/"
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[[rule.threat.technique.subtechnique]]
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id = "T1070.006"
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name = "Timestomp"
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reference = "https://attack.mitre.org/techniques/T1070/006/"
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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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