Jonhnathan
0e1edfecea
* [Rule Tuning] Windows Noisy BBRs * ++ * bump * Update credential_access_win_private_key_access.toml * Update credential_access_win_private_key_access.toml
102 lines
3.1 KiB
TOML
102 lines
3.1 KiB
TOML
[metadata]
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bypass_bbr_timing = true
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creation_date = "2023/09/21"
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integration = ["endpoint"]
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maturity = "production"
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updated_date = "2025/01/10"
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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Identifies the creation or modification of a medium size memory dump file which can indicate an attempt to access
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credentials from a process memory.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.file-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Potential Credential Access via Memory Dump File Creation"
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risk_score = 21
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rule_id = "e707a7be-cc52-41ac-8ab3-d34b38c20005"
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severity = "low"
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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: Credential Access",
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"Data Source: Elastic Defend",
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"Rule Type: BBR",
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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.type == "creation" and
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/* MDMP header */
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file.Ext.header_bytes : "4d444d50*" and file.size >= 30000 and
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not
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(
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(
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process.name : "System" or
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process.executable : (
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"?:\\Windows\\System32\\WerFault.exe",
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"?:\\Windows\\SysWOW64\\WerFault.exe",
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"?:\\Windows\\System32\\Wermgr.exe",
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"?:\\Windows\\SysWOW64\\Wermgr.exe",
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"?:\\Windows\\System32\\WerFaultSecure.exe",
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"?:\\Windows\\SysWOW64\\WerFaultSecure.exe",
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"?:\\Windows\\System32\\WUDFHost.exe",
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"C:\\Windows\\System32\\rdrleakdiag.exe",
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"?:\\Windows\\System32\\Taskmgr.exe",
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"?:\\Windows\\SysWOW64\\Taskmgr.exe",
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"?:\\Program Files\\*.exe",
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"?:\\Program Files (x86)\\*.exe",
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"?:\\Windows\\SystemApps\\*.exe",
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"?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin\\zCrashReport64.exe",
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"?:\\Windows\\CCM\\ccmdump.exe",
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"?:\\$WINDOWS.~BT\\Sources\\SetupHost.exe"
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) and process.code_signature.trusted == true
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) or
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(
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file.path : (
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"?:\\ProgramData\\Microsoft\\Windows\\WER\\*",
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"?:\\ProgramData\\Microsoft\\WDF\\*",
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"?:\\ProgramData\\Alteryx\\ErrorLogs\\*",
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"?:\\ProgramData\\Goodix\\*",
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"?:\\Windows\\system32\\config\\systemprofile\\AppData\\Local\\CrashDumps\\*",
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"?:\\Users\\*\\AppData\\Roaming\\Zoom\\logs\\zoomcrash*",
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"?:\\Users\\*\\AppData\\*\\Crashpad\\*",
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"?:\\Users\\*\\AppData\\*\\crashpaddb\\*",
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"?:\\Users\\*\\AppData\\*\\HungReports\\*",
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"?:\\Users\\*\\AppData\\*\\CrashDumps\\*",
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"?:\\Users\\*\\AppData\\*\\NativeCrashReporting\\*",
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"?:\\Program Files (x86)\\*\\Crashpad\\*",
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"?:\\Program Files\\*\\Crashpad\\*"
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) and (process.code_signature.trusted == true or process.executable == null)
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)
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)
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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 = "T1003"
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name = "OS Credential Dumping"
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reference = "https://attack.mitre.org/techniques/T1003/"
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[[rule.threat.technique.subtechnique]]
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id = "T1003.001"
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name = "LSASS Memory"
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reference = "https://attack.mitre.org/techniques/T1003/001/"
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[rule.threat.tactic]
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id = "TA0006"
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name = "Credential Access"
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reference = "https://attack.mitre.org/tactics/TA0006/"
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