Service Created by Suspicious Process and Activated

[rule]
description = """
This rule detects the creation and activation of a service by a system process. Threat actors may abuse this to
establish persistence or escalate privileges.
"""
id = "bada19f8-3ca7-4b44-812b-788e4f4f1342"
license = "Elastic License v2"
name = "Service Created by Suspicious Process and Activated"
os_list = ["linux"]
version = "1.0.5"

query = '''
sequence with maxspan=30s
  [file where event.action == "creation" and file.extension == "service" and file.path like (
    "/etc/systemd/system/*", "/etc/systemd/user/*", "/usr/local/lib/systemd/system/*",
    "/lib/systemd/system/*", "/usr/lib/systemd/system/*", "/usr/lib/systemd/user/*",
    "/home/*/.config/systemd/user/*", "/home/*/.local/share/systemd/user/*",
    "/root/.config/systemd/user/*", "/root/.local/share/systemd/user/*"
  ) and (
    process.executable like (
      "/tmp/*", "/var/tmp/*", "/dev/shm/*", "/run/user/*", "/var/run/user/*", "/home/*/*", "/root/*", "/boot/*", "./*"
    ) or
    process.name in ("curl", "wget")
  ) and
  not process.executable like (
    "/tmp/tmp.*/nix-installer", "/tmp/octofence-agent-installer_*", "/tmp/selfgz*/install.sh",
    "/home/*/elastic-agent/.claude/*/elastic-agent", "/tmp/TestHeartbeatHTTPMonitor*/*/elastic-agent",
    "/home/*/Downloads/*/elastic-agent", "/home/*/duoauthproxy-build/usr/local/bin/python3", "./elastic-agent",
    "/root/elastic-agent-*/elastic-agent", "/home/*/elastic-agent-*/data/elastic-agent-*/elastic-agent",
    "/tmp/elastic-agent-*/elastic-agent", "/tmp/cybercnsagent_linux", "/root/.cursor-server/bin/linux-x64/*/node"
  )] as event0
  [process where event.type == "start" and event.action == "exec" and process.name == "systemctl" and
  process.args in ("enable", "start") and stringcontains(process.command_line, event0.file.name)]
'''

min_endpoint_version = "8.5.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 1

[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 0

[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 1

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1569"
name = "System Services"
reference = "https://attack.mitre.org/techniques/T1569/"
[[threat.technique.subtechnique]]
id = "T1569.002"
name = "Service Execution"
reference = "https://attack.mitre.org/techniques/T1569/002/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1053"
name = "Scheduled Task/Job"
reference = "https://attack.mitre.org/techniques/T1053/"

[[threat.technique]]
id = "T1543"
name = "Create or Modify System Process"
reference = "https://attack.mitre.org/techniques/T1543/"
[[threat.technique.subtechnique]]
id = "T1543.002"
name = "Systemd Service"
reference = "https://attack.mitre.org/techniques/T1543/002/"



[threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1053"
name = "Scheduled Task/Job"
reference = "https://attack.mitre.org/techniques/T1053/"

[[threat.technique]]
id = "T1543"
name = "Create or Modify System Process"
reference = "https://attack.mitre.org/techniques/T1543/"
[[threat.technique.subtechnique]]
id = "T1543.002"
name = "Systemd Service"
reference = "https://attack.mitre.org/techniques/T1543/002/"



[threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1071"
name = "Application Layer Protocol"
reference = "https://attack.mitre.org/techniques/T1071/"


[threat.tactic]
id = "TA0011"
name = "Command and Control"
reference = "https://attack.mitre.org/tactics/TA0011/"

[internal]
min_endpoint_version = "8.5.0"