sigma-rules/rules/windows/credential_access_wireless_creds_dumping.toml

[metadata]
creation_date = "2022/11/01"
integration = ["endpoint", "system", "windows", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
maturity = "production"
updated_date = "2026/04/27"

[rule]
author = ["Elastic"]
description = "Identifies attempts to dump Wireless saved access keys in clear text using the Windows built-in utility Netsh."
from = "now-9m"
index = [
    "endgame-*",
    "logs-crowdstrike.fdr*",
    "logs-endpoint.events.process-*",
    "logs-m365_defender.event-*",
    "logs-sentinel_one_cloud_funnel.*",
    "logs-system.security*",
    "logs-windows.forwarded*",
    "logs-windows.sysmon_operational-*",
    "winlogbeat-*",
]
language = "eql"
license = "Elastic License v2"
name = "Wireless Credential Dumping using Netsh Command"
references = [
    "https://learn.microsoft.com/en-us/windows-server/networking/technologies/netsh/netsh-contexts",
    "https://www.geeksforgeeks.org/how-to-find-the-wi-fi-password-using-cmd-in-windows/",
]
risk_score = 73
rule_id = "2de87d72-ee0c-43e2-b975-5f0b029ac600"
severity = "high"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Credential Access",
    "Tactic: Discovery",
    "Data Source: Elastic Endgame",
    "Resources: Investigation Guide",
    "Data Source: Elastic Defend",
    "Data Source: Windows Security Event Logs",
    "Data Source: Microsoft Defender XDR",
    "Data Source: Sysmon",
    "Data Source: SentinelOne",
    "Data Source: Crowdstrike",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and
 (process.name : "netsh.exe" or ?process.pe.original_file_name == "netsh.exe") and
  process.args : "wlan" and process.args : "key*clear"
'''

note = """## Triage and analysis

### Investigating Wireless Credential Dumping using Netsh Command

#### Possible investigation steps

- What did the alert-local netsh command expose or export?
  - Focus: `process.command_line`, `process.executable`, `process.pe.original_file_name`, `process.code_signature.subject_name`.
  - Implication: escalate when `key=clear` appears with bulk profile listing, `export profile`, omitted profile name, remote `-r`, script-file `-f`, or redirection; lower concern only when one local profile display fits recognized support or recovery. A signed Microsoft binary does not clear credential exposure.

- Does the launcher, session, and user context explain why this account retrieved a wireless key on this host?
  - Focus: `process.parent.executable`, `process.parent.command_line`, `process.Ext.session_info.logon_type`, `user.id`, `host.id`.
  - Implication: escalate when the parent is a shell, script host, remote-admin chain, document-spawned process, unexpected service identity, or unusual device-support user; lower concern when an interactive support shell or endpoint-management parent on the same host explains the exact command.

- Did the same launcher fan out from one display command into broader wireless-profile collection?
  - Why: attackers often enumerate profile names with `wlan show profiles`, then display or export cleartext secrets; same-launcher enumeration without `key=clear` is precursor discovery.
  - Focus: related process starts on `host.id` and `process.parent.entity_id`, using `process.executable` and `process.command_line`. $investigate_0
  - Implication: escalate when the parent also runs profile enumeration, repeated `show profile`, `export profile`, or export without `name=`; keep review local when activity stays isolated to one profile display.
  - Hint: If `process.parent.entity_id` is absent, pivot with `host.id`, `process.parent.pid`, and the alert window.

- Did the launcher or siblings stage recovered wireless material?
  - Focus: same-parent process starts on `host.id`, using `process.executable` and `process.command_line`; file events from `host.id` plus `process.entity_id` or weaker `process.pid`, reviewing `file.path`, `file.extension`, and `file.size`. $investigate_1
  - Implication: escalate when XML, redirected text, ZIP files, copied profiles, archive tools, copy utilities, cloud-sync clients, shell redirection, or script wrappers stage material for later use or transfer; missing file telemetry is unresolved, not benign. A clean file view lowers concern only when command and lineage also stay limited.

- If local evidence remains suspicious or unresolved, do related alerts change scope or urgency?
  - Focus: related alerts for `user.id`, especially credential-access, lateral-movement, staging, remote-access, or persistence findings. $investigate_2
  - Implication: broaden response when the same user or host also shows dumping, staging, remote access, or persistence; keep scope local when related alerts are absent and local evidence supports one bounded workflow.
  - Hint: If the user view is sparse or the host is shared, review alerts for the same `host.id`. $investigate_3

- Escalate when command intent, lineage, same-launcher collection, staging, file artifacts, or related alerts show bulk credential access or broader compromise; close only when binary identity, command scope, parent workflow, user-host context, and recovery records bind to one recognized support or recovery action; preserve artifacts and escalate when evidence is mixed or incomplete.

### False positive analysis

- Helpdesk, field-support, device-recovery, imaging, hardware replacement, or Wi-Fi profile migration can retrieve one saved wireless key. Confirm signed netsh identity, one local profile display or expected export in `process.command_line`, support-tooling parentage, and no bulk enumeration, archive staging, or transfer; use asset or ticket records only to corroborate that exact action, otherwise require the same executable, parent, command pattern, `user.id`, `host.id`, and quiet surrounding activity across prior alerts from this rule.
- Before creating an exception, validate recurrence of the same `process.executable`, `process.parent.executable`, `process.command_line` pattern, `user.id`, and `host.id` with the same limited scope. Avoid exceptions on `process.name`, `key=clear` alone, the host alone, or all netsh wireless activity.

### Response and remediation

- If confirmed benign, reverse any temporary containment and document which evidence matched the support or recovery workflow: command scope, binary identity, parent workflow, `user.id`, `host.id`, and absence of collection or staging. Create an exception only after the same limited pattern recurs.
- If suspicious but unconfirmed, preserve the alert record, case export, volatile process context, `process.entity_id`, `process.command_line`, `process.parent.command_line`, sibling process starts, staged artifacts when recovered, and affected `user.id` and `host.id`. Start with reversible containment such as temporary wireless or network restrictions; use host isolation only if staging, export, transfer, or broader compromise is evident.
- If confirmed malicious, isolate the endpoint or terminate the offending process through endpoint-response tooling after recording `process.entity_id`, `process.command_line`, parent context, exposed profile names, staged artifacts, and related-alert evidence. If tooling is unavailable, escalate with the preserved evidence set.
- Reset or rotate credentials exposed by the dumped wireless profile. For PSK environments, rotate the affected SSID key; for 802.1X environments, revoke or reissue affected certificates, reset cached credentials, and verify whether the exposed profile could grant broader network access.
- Before deleting artifacts, review other hosts and users for the same `process.command_line`, parent pattern, or exported profile artifacts so scoping finishes before evidence is destroyed.
- Eradicate only scripts, batch files, XML exports, archives, and persistence mechanisms found during the investigation, then remediate the initial access path that allowed the key retrieval.
"""

setup = """## Setup

This rule is designed for data generated by [Elastic Defend](https://www.elastic.co/security/endpoint-security), which provides native endpoint detection and response, along with event enrichments designed to work with our detection rules.

Setup instructions: https://ela.st/install-elastic-defend

### Additional data sources

This rule also supports the following third-party data sources. For setup instructions, refer to the links below:

- [CrowdStrike](https://ela.st/crowdstrike-integration)
- [Microsoft Defender XDR](https://ela.st/m365-defender)
- [SentinelOne Cloud Funnel](https://ela.st/sentinel-one-cloud-funnel)
- [Sysmon Event ID 1 - Process Creation](https://ela.st/sysmon-event-1-setup)
- [Windows Process Creation Logs](https://ela.st/audit-process-creation)
"""

[rule.investigation_fields]
field_names = [
    "@timestamp",
    "host.id",
    "user.id",
    "process.entity_id",
    "process.pid",
    "process.executable",
    "process.command_line",
    "process.args",
    "process.pe.original_file_name",
    "process.parent.entity_id",
    "process.parent.pid",
    "process.parent.executable",
    "process.parent.command_line",
    "process.code_signature.subject_name",
    "process.code_signature.trusted",
]

[transform]

[[transform.investigate]]
label = "Process starts from the same parent"
description = ""
providers = [
  [
    { excluded = false, field = "event.category", queryType = "phrase", value = "process", valueType = "string" },
    { excluded = false, field = "host.id", queryType = "phrase", value = "{{host.id}}", valueType = "string" },
    { excluded = false, field = "process.parent.entity_id", queryType = "phrase", value = "{{process.parent.entity_id}}", valueType = "string" }
  ]
]
relativeFrom = "now-1h"
relativeTo = "now"

[[transform.investigate]]
label = "File activity for the alerting process"
description = ""
providers = [
  [
    { excluded = false, field = "event.category", queryType = "phrase", value = "file", valueType = "string" },
    { excluded = false, field = "host.id", queryType = "phrase", value = "{{host.id}}", valueType = "string" },
    { excluded = false, field = "process.entity_id", queryType = "phrase", value = "{{process.entity_id}}", valueType = "string" }
  ]
]
relativeFrom = "now-1h"
relativeTo = "now"

[[transform.investigate]]
label = "Alerts associated with the user"
description = ""
providers = [
  [
    { excluded = false, field = "event.kind", queryType = "phrase", value = "signal", valueType = "string" },
    { excluded = false, field = "user.id", queryType = "phrase", value = "{{user.id}}", valueType = "string" }
  ]
]
relativeFrom = "now-48h/h"
relativeTo = "now"

[[transform.investigate]]
label = "Alerts associated with the host"
description = ""
providers = [
  [
    { excluded = false, field = "event.kind", queryType = "phrase", value = "signal", valueType = "string" },
    { excluded = false, field = "host.id", queryType = "phrase", value = "{{host.id}}", valueType = "string" }
  ]
]
relativeFrom = "now-48h/h"
relativeTo = "now"

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1003"
name = "OS Credential Dumping"
reference = "https://attack.mitre.org/techniques/T1003/"

[[rule.threat.technique]]
id = "T1552"
name = "Unsecured Credentials"
reference = "https://attack.mitre.org/techniques/T1552/"

[[rule.threat.technique.subtechnique]]
id = "T1552.001"
name = "Credentials In Files"
reference = "https://attack.mitre.org/techniques/T1552/001/"

[[rule.threat.technique]]
id = "T1555"
name = "Credentials from Password Stores"
reference = "https://attack.mitre.org/techniques/T1555/"

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

[[rule.threat]]
framework = "MITRE ATT&CK"

[[rule.threat.technique]]
id = "T1016"
name = "System Network Configuration Discovery"
reference = "https://attack.mitre.org/techniques/T1016/"

[[rule.threat.technique]]
id = "T1082"
name = "System Information Discovery"
reference = "https://attack.mitre.org/techniques/T1082/"

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