[metadata]
creation_date = "2020/12/20"
maturity = "production"
updated_date = "2021/03/08"

[rule]
author = ["Elastic"]
description = """
Identifies the use of the grep command to discover known third-party macOS and Linux security tools, such as Antivirus
or Host Firewall details.
"""
false_positives = ["Endpoint Security installers, updaters and post installation verification scripts."]
from = "now-9m"
index = ["logs-endpoint.events.*", "auditbeat-*"]
language = "eql"
license = "Elastic License v2"
name = "Security Software Discovery via Grep"
risk_score = 47
rule_id = "870aecc0-cea4-4110-af3f-e02e9b373655"
severity = "medium"
tags = ["Elastic", "Host", "macOS", "Linux", "Threat Detection", "Discovery"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type == "start" and
process.name : "grep" and user.id != "0" and
 not process.parent.executable : "/Library/Application Support/*" and
   process.args :
         ("Little Snitch*",
          "Avast*",
          "Avira*",
          "ESET*",
          "BlockBlock*",
          "360Sec*",
          "LuLu*",
          "KnockKnock*",
          "kav",
          "KIS",
          "RTProtectionDaemon*",
          "Malware*",
          "VShieldScanner*",
          "WebProtection*",
          "webinspectord*",
          "McAfee*",
          "isecespd*",
          "macmnsvc*",
          "masvc*",
          "kesl*",
          "avscan*",
          "guard*",
          "rtvscand*",
          "symcfgd*",
          "scmdaemon*",
          "symantec*",
          "sophos*",
          "osquery*",
          "elastic-endpoint*"
          ) and
   not (process.args : "Avast" and process.args : "Passwords")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1518"
name = "Software Discovery"
reference = "https://attack.mitre.org/techniques/T1518/"
[[rule.threat.technique.subtechnique]]
id = "T1518.001"
name = "Security Software Discovery"
reference = "https://attack.mitre.org/techniques/T1518/001/"



[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"