[metadata]
creation_date = "2021/01/12"
maturity = "production"
updated_date = "2022/07/05"

[rule]
author = ["Elastic"]
description = "Identifies the execution of and EggShell Backdoor. EggShell is a known post exploitation tool for macOS and Linux."
from = "now-9m"
index = ["auditbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License v2"
name = "EggShell Backdoor Execution"
references = ["https://github.com/neoneggplant/EggShell"]
risk_score = 73
rule_id = "41824afb-d68c-4d0e-bfee-474dac1fa56e"
severity = "high"
tags = ["Elastic", "Host", "Linux", "macOS", "Threat Detection", "Execution"]
timestamp_override = "event.ingested"
type = "query"

query = '''
event.category:process and event.type:(start or process_started) and process.name:espl and process.args:eyJkZWJ1ZyI6*
'''

[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
id = "T1059"
[[rule.threat.technique.subtechnique]]
id = "T1059.006"
name = "Python"
reference = "https://attack.mitre.org/techniques/T1059/006/"


[rule.threat.tactic]
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
id = "TA0002"