[metadata]
creation_date = "2021/01/05"
maturity = "production"
updated_date = "2021/03/09"

[rule]
author = ["Elastic"]
description = """
Identifies the use of the built-in networksetup command to configure webproxy settings. This may indicate an attempt to
hijack web browser traffic for credential access via traffic sniffing or redirection.
"""
false_positives = ["Legitimate WebProxy Settings Modification"]
from = "now-9m"
index = ["auditbeat-*", "logs-endpoint.events.*"]
language = "kuery"
license = "Elastic License v2"
name = "WebProxy Settings Modification"
references = [
    "https://unit42.paloaltonetworks.com/mac-malware-steals-cryptocurrency-exchanges-cookies/",
    "https://objectivebythesea.com/v2/talks/OBTS_v2_Zohar.pdf",
]
risk_score = 47
rule_id = "10a500bb-a28f-418e-ba29-ca4c8d1a9f2f"
severity = "medium"
tags = ["Elastic", "Host", "macOS", "Threat Detection", "Credential Access"]
timestamp_override = "event.ingested"
type = "query"

query = '''
event.category : process and event.type : start and
 process.name : networksetup and process.args : (("-setwebproxy" or "-setsecurewebproxy" or "-setautoproxyurl") and not (Bluetooth or off)) and
 not process.parent.executable : ("/Library/PrivilegedHelperTools/com.80pct.FreedomHelper" or
                                  "/Applications/Fiddler Everywhere.app/Contents/Resources/app/out/WebServer/Fiddler.WebUi" or
                                  "/usr/libexec/xpcproxy")
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1539"
name = "Steal Web Session Cookie"
reference = "https://attack.mitre.org/techniques/T1539/"


[rule.threat.tactic]
id = "TA0006"
name = "Credential Access"
reference = "https://attack.mitre.org/tactics/TA0006/"