Netskope - Repeated or Critical Policy Violations

Status: available
Severity: high
Time window: 1h
Group by: CsUsername, XCCountry, XCDevice
Source: github.com/Azure/Azure-Sentinel

Detects users with repeated policy violations or critical policy blocks. Monitors policy enforcement effectiveness and compliance.

MITRE ATT&CK coverage

Tactic	Techniques
Stealth	`T1562` Impair Defenses
Exfiltration	`T1048` Exfiltration Over Alternative Protocol

Rule body kusto

id: dacab67e-fcf3-41c6-a191-579c7be1814d
name: Netskope - Repeated or Critical Policy Violations
description: |
  Detects users with repeated policy violations or critical policy blocks. Monitors policy enforcement effectiveness and compliance.
severity: High
status: Available
requiredDataConnectors:
  - connectorId: NetskopeWebTxConnector
    dataTypes:
      - NetskopeWebTransactions_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - DefenseEvasion
  - Exfiltration
relevantTechniques:
  - T1562
  - T1048
query: |
  let violationThreshold = 5;
  NetskopeWebTransactions_CL
  | where TimeGenerated > ago(1h)
  | where isnotempty(CsUsername)
  | where isnotempty(XPolicyAction) and isnotempty(XPolicyName)
  | where XPolicyAction =~ 'block' or XPolicyAction =~ 'alert'
  | summarize 
      ViolationCount = count(),
      Policies = make_set(XPolicyName),
      PolicyActions = make_set(XPolicyAction),
      Apps = make_set(XCsApp),
      Hosts = make_set(CsHost),
      Activities = make_set(XCsAppActivity),
      BlockCount = countif(XPolicyAction =~ 'block'),
      AlertCount = countif(XPolicyAction =~ 'alert'),
      FirstViolation = min(TimeGenerated),
      LastViolation = max(TimeGenerated)
      by CsUsername, XCCountry, XCDevice
  | where ViolationCount >= violationThreshold or BlockCount > 0
  | extend ViolationSeverity = case(
      BlockCount > 10, 'Critical',
      BlockCount > 5, 'High',
      ViolationCount > 20, 'High',
      ViolationCount > 10, 'Medium',
      'Low')
  | project 
      TimeGenerated = LastViolation,
      User = CsUsername,
      TotalViolations = ViolationCount,
      BlockedAttempts = BlockCount,
      AlertedActions = AlertCount,
      ViolatedPolicies = Policies,
      PolicyActions,
      ApplicationsInvolved = Apps,
      TargetHosts = Hosts,
      Activities,
      Country = XCCountry,
      Device = XCDevice,
      ViolationSeverity,
      FirstOccurrence = FirstViolation,
      LastOccurrence = LastViolation
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: User
version: 1.0.0
kind: Scheduled

Stages and Predicates

Parameters

let violationThreshold = 5;

Stage 1: `source`

NetskopeWebTransactions_CL

Stage 2: `where`

| where TimeGenerated > ago(1h)

Stage 3: `where`

| where isnotempty(CsUsername)

Stage 4: `where`

| where isnotempty(XPolicyAction) and isnotempty(XPolicyName)

Stage 5: `where`

| where XPolicyAction =~ 'block' or XPolicyAction =~ 'alert'

Stage 6: `summarize`

| summarize 
    ViolationCount = count(),
    Policies = make_set(XPolicyName),
    PolicyActions = make_set(XPolicyAction),
    Apps = make_set(XCsApp),
    Hosts = make_set(CsHost),
    Activities = make_set(XCsAppActivity),
    BlockCount = countif(XPolicyAction =~ 'block'),
    AlertCount = countif(XPolicyAction =~ 'alert'),
    FirstViolation = min(TimeGenerated),
    LastViolation = max(TimeGenerated)
    by CsUsername, XCCountry, XCDevice

Stage 7: `where`

| where ViolationCount >= violationThreshold or BlockCount > 0

Stage 8: `extend`

| extend ViolationSeverity = case(
    BlockCount > 10, 'Critical',
    BlockCount > 5, 'High',
    ViolationCount > 20, 'High',
    ViolationCount > 10, 'Medium',
    'Low')

ViolationSeverity =

ifBlockCount > 10'Critical'

elifBlockCount > 5'High'

elifViolationCount > 20'High'

elifViolationCount > 10'Medium'

else'Low'

Stage 9: `project`

| project 
    TimeGenerated = LastViolation,
    User = CsUsername,
    TotalViolations = ViolationCount,
    BlockedAttempts = BlockCount,
    AlertedActions = AlertCount,
    ViolatedPolicies = Policies,
    PolicyActions,
    ApplicationsInvolved = Apps,
    TargetHosts = Hosts,
    Activities,
    Country = XCCountry,
    Device = XCDevice,
    ViolationSeverity,
    FirstOccurrence = FirstViolation,
    LastOccurrence = LastViolation

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
`BlockCount`	gt	`0` transforms: `cased`
`CsUsername`	is_not_null	(no value, null check)
`ViolationCount`	ge	`5` transforms: `cased`
`XPolicyAction`	eq	`alert` `block`
`XPolicyAction`	is_not_null	(no value, null check)
`XPolicyName`	is_not_null	(no value, null check)

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	Source
`Activities`	`project`
`AlertedActions`	`project`
`ApplicationsInvolved`	`project`
`BlockedAttempts`	`project`
`Country`	`project`
`Device`	`project`
`FirstOccurrence`	`project`
`LastOccurrence`	`project`
`PolicyActions`	`project`
`TargetHosts`	`project`
`TimeGenerated`	`project`
`TotalViolations`	`project`
`User`	`project`
`ViolatedPolicies`	`project`
`ViolationSeverity`	`project`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`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)

Netskope - Repeated or Critical Policy Violations

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `where`

Stage 5: `where`

Stage 6: `summarize`

Stage 7: `where`

Stage 8: `extend`

Stage 9: `project`

Indicators

Output fields

Keyboard shortcuts

Search operators

Netskope - Repeated or Critical Policy Violations

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Parameters

Stage 1: source

Stage 2: where

Stage 3: where

Stage 4: where

Stage 5: where

Stage 6: summarize

Stage 7: where

Stage 8: extend

Stage 9: project

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `where`

Stage 5: `where`

Stage 6: `summarize`

Stage 7: `where`

Stage 8: `extend`

Stage 9: `project`