Attempted Private Key Access

[metadata]
creation_date = "2023/08/21"
integration = ["endpoint", "windows", "system"]
maturity = "production"
updated_date = "2026/03/24"

[rule]
author = ["Elastic"]
building_block_type = "default"
description = "Attackers may try to access private keys, e.g. ssh, in order to gain further authenticated access to the environment.\n"
from = "now-119m"
index = [
    "endgame-*",
    "logs-endpoint.events.process-*",
    "logs-system.security*",
    "logs-windows.sysmon_operational-*",
    "winlogbeat-*",
]
interval = "60m"
language = "eql"
license = "Elastic License v2"
name = "Attempted Private Key Access"
risk_score = 21
rule_id = "c55badd3-3e61-4292-836f-56209dc8a601"
severity = "low"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Credential Access",
    "Data Source: Elastic Defend",
    "Rule Type: BBR",
    "Data Source: Sysmon",
    "Data Source: Elastic Endgame",
    "Data Source: Windows Security Event Logs",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and
  process.command_line : ("*.pem *", "*.pem", "*.id_rsa*") and
  not process.args : (
        "--rootcert",
        "--cert",
        "--crlfile"
  ) and
  not process.command_line : (
        "*--cacert*",
        "*--ssl-cert*",
        "*--tls-cert*",
        "*--tls_server_certs*"
  ) and
  not process.executable : (
    "?:\\ProgramData\\Logishrd\\LogiOptions\\Software\\*\\LogiLuUpdater.exe",
    "?:\\Program Files\\Elastic\\Agent\\data\\*\\osqueryd.exe",
    "?:\\Program Files\\Git\\cmd\\git.exe",
    "?:\\Program Files\\Git\\mingw64\\bin\\git.exe",
    "?:\\Program Files\\Guardicore\\gc-controller.exe",
    "?:\\Program Files\\Guardicore\\gc-deception-agent.exe",
    "?:\\Program Files\\Guardicore\\gc-detection-agent.exe",
    "?:\\Program Files\\Guardicore\\gc-enforcement-agent.exe",
    "?:\\Program Files\\Guardicore\\gc-guest-agent.exe",
    "?:\\Program Files\\Logi\\LogiBolt\\LogiBoltUpdater.exe",
    "?:\\Program Files (x86)\\Schneider Electric EcoStruxure\\Building Operation 5.0\\Device Administrator\\Python\\python.exe",
    "?:\\Program Files\\Splunk\\bin\\openssl.exe",
    "?:\\Program Files\\SplunkUniversalForwarder\\bin\\openssl.exe",
    "?:\\Users\\*\\AppData\\Local\\Logi\\LogiBolt\\LogiBoltUpdater.exe",
    "?:\\Windows\\system32\\icacls.exe",
    "?:\\Windows\\System32\\OpenSSH\\*"
  )
'''


[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1552"
name = "Unsecured Credentials"
reference = "https://attack.mitre.org/techniques/T1552/"

[[rule.threat.technique.subtechnique]]
id = "T1552.004"
name = "Private Keys"
reference = "https://attack.mitre.org/techniques/T1552/004/"

[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1005"
name = "Data from Local System"
reference = "https://attack.mitre.org/techniques/T1005/"

[rule.threat.tactic]
id = "TA0009"
name = "Collection"
reference = "https://attack.mitre.org/tactics/TA0009/"