Security Software Discovery via Grep

Identifies the use of the grep command to discover known third-party macOS and Linux security tools, such as Antivirus or Host Firewall details.

Rule type: eql

Rule indices:

logs-endpoint.events.*
auditbeat-*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Host
macOS
Linux
Threat Detection
Discovery

Version: 5

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

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")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
Technique:
- Name: Software Discovery
- ID: T1518
- Reference URL: https://attack.mitre.org/techniques/T1518/
Sub-technique:
- Name: Security Software Discovery
- ID: T1518.001
- Reference URL: https://attack.mitre.org/techniques/T1518/001/

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