WebProxy Settings Modification

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.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

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:

Tags:

Elastic
Host
macOS
Threat Detection
Credential Access

Version: 101

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

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")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Steal Web Session Cookie
- ID: T1539
- Reference URL: https://attack.mitre.org/techniques/T1539/

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