command_and_control_common_webservices.toml

[metadata]
creation_date = "2020/11/04"
maturity = "production"
updated_date = "2021/09/23"

[rule]
author = ["Elastic"]
description = """
Adversaries may implement command and control communications that use common web services in order to hide their
activity. This attack technique is typically targeted to an organization and uses web services common to the victim
network which allows the adversary to blend into legitimate traffic. activity. These popular services are typically
targeted since they have most likely been used before a compromise and allow adversaries to blend in the network.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Connection to Commonly Abused Web Services"
risk_score = 21
rule_id = "66883649-f908-4a5b-a1e0-54090a1d3a32"
severity = "low"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Command and Control"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
network where network.protocol == "dns" and
    process.name != null and user.id not in ("S-1-5-18", "S-1-5-19", "S-1-5-20") and
    /* Add new WebSvc domains here */
    dns.question.name :
    (
        "raw.githubusercontent.*",
        "*.pastebin.*",
        "*drive.google.*",
        "*docs.live.*",
        "*api.dropboxapi.*",
        "*dropboxusercontent.*",
        "*onedrive.*",
        "*4shared.*",
        "*.file.io",
        "*filebin.net",
        "*slack-files.com",
        "*ghostbin.*",
        "*ngrok.*",
        "*portmap.*",
        "*serveo.net",
        "*localtunnel.me",
        "*pagekite.me",
        "*localxpose.io",
        "*notabug.org",
        "rawcdn.githack.*",
        "paste.nrecom.net",
        "zerobin.net",
        "controlc.com",
        "requestbin.net"
    ) and
    /* Insert noisy false positives here */
    not process.executable :
    (
      "?:\\Program Files\\*.exe",
      "?:\\Program Files (x86)\\*.exe",
      "?:\\Windows\\System32\\WWAHost.exe",
      "?:\\Windows\\System32\\smartscreen.exe",
      "?:\\Windows\\System32\\MicrosoftEdgeCP.exe",
      "?:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\*\\MsMpEng.exe",
      "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
      "?:\\Users\\*\\AppData\\Local\\Programs\\Fiddler\\Fiddler.exe",
      "?:\\Users\\*\\AppData\\Local\\Programs\\Microsoft VS Code\\Code.exe",
      "?:\\Users\\*\\AppData\\Local\\Microsoft\\OneDrive\\OneDrive.exe",
      "?:\\Windows\\system32\\mobsync.exe",
      "?:\\Windows\\SysWOW64\\mobsync.exe"
    )
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1102"
name = "Web Service"
reference = "https://attack.mitre.org/techniques/T1102/"


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


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1567"
name = "Exfiltration Over Web Service"
reference = "https://attack.mitre.org/techniques/T1567/"

  [[rule.threat.technique.subtechnique]]
  id = "T1567.001"
  name = "Exfiltration to Code Repository"
  reference = "https://attack.mitre.org/techniques/T1567/001/"

  [[rule.threat.technique.subtechnique]]
  id = "T1567.002"
  name = "Exfiltration to Cloud Storage"
  reference = "https://attack.mitre.org/techniques/T1567/002/"


[rule.threat.tactic]
id = "TA0010"
name = "Exfiltration"
reference = "https://attack.mitre.org/tactics/TA0010/"