User Logged in wihout MFA

Severity: high
Log types: Gravitational.TeleportAudit
Tags: Teleport
Reference: https://goteleport.com/docs/management/admin/
Source: github.com/panther-labs/panther-analysis

A local User logged in without MFA

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1078` Valid Accounts

Rule body yaml

AnalysisType: rule
Filename: teleport_local_user_login_without_mfa.py
RuleID: Teleport.LocalUserLoginWithoutMFA
DisplayName: User Logged in wihout MFA
Enabled: true
LogTypes:
  - Gravitational.TeleportAudit
Tags:
  - Teleport
Severity: High
Description: A local User logged in without MFA
DedupPeriodMinutes: 60
Reports:
  MITRE ATT&CK:
    - TA0001:T1078
Reference: https://goteleport.com/docs/management/admin/
Runbook: >
  A local user logged in without Multi-Factor Authentication
SummaryAttributes:
  - event
  - code
  - user
  - success
  - mfa_device
Tests:
  - Name: User logged in with MFA
    ExpectedResult: false
    Log:
      {
        "addr.remote": "[2001:db8:feed:face:c0ff:eeb0:baf00:00d]:65123",
        "cluster_name": "teleport.example.com",
        "code": "T1000I",
        "ei": 0,
        "event": "user.login",
        "method": "local",
        "mfa_device":
          {
            "mfa_device_name": "1Password",
            "mfa_device_type": "WebAuthn",
            "mfa_device_uuid": "88888888-4444-4444-4444-222222222222",
          },
        "success": true,
        "time": "2023-09-20T19:00:00.123456Z",
        "uid": "88888888-4444-4444-4444-222222222222",
        "user": "max.mustermann",
        "user_agent": "Examplecorp Spacedeck-web/99.9 (Hackintosh; ARM Cortex A1000)",
      }
  - Name: User logged in without MFA
    ExpectedResult: false
    Log:
      {
        "addr.remote": "[2001:db8:face:face:face:face:face:face]:65123",
        "cluster_name": "teleport.example.com",
        "code": "T1000I",
        "ei": 0,
        "event": "user.login",
        "method": "local",
        "success": true,
        "time": "2023-09-20T19:00:00.123456Z",
        "uid": "88888888-4444-4444-4444-222222222222",
        "user": "max.mustermann",
        "user_agent": "Examplecorp Spacedeck-web/99.9 (Hackintosh; ARM Cortex A1000)",
      }

Detection logic

Condition

event eq "user.login"
success eq "true"
method eq "local"
mfa_device is_null

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`event`	eq	`user.login`
`method`	eq	`local`
`mfa_device`	is_null	(no value, null check)
`success`	eq	`true`

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

Field
`user`
`cluster_name`

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`f`	Follow link (`Shift` = new tab)
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`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)