Votiro - File Blocked from Connector

Severity: low
Time window: 10m
Group by: FileWithConnectorDetails, LogSeverity, SrcFileSHA256, fileName, policyName, sanitizationResult
Source: github.com/Azure/Azure-Sentinel

'The analytic rule is intended to detect when a file is blocked by Votiro Sanitization Engine due to a specific policy, and notify the appropriate parties so that they can take appropriate action. The alert message will state that a file with a specific name and hash value was blocked by Votiro Sanatization Engine due to a specific policy name, and that more details can be found at a specific incident URL.'

MITRE ATT&CK coverage

Tactic	Techniques
Stealth	`T1036` Masquerading
Discovery	`T1057` Process Discovery, `T1082` System Information Discovery, `T1083` File and Directory Discovery
Impact	`T1498` Network Denial of Service, `T1565` Data Manipulation
Impact	`T0837` Loss of Protection

Rule body kusto

id: 17bf3780-ae0d-4cd9-a884-5df8b687f3f5
name: Votiro - File Blocked from Connector
description: |
 'The analytic rule is intended to detect when a file is blocked by Votiro Sanitization Engine due to a specific policy, and notify the appropriate parties so that they can take appropriate action. The alert message will state that a file with a specific name and hash value was blocked by Votiro Sanatization Engine due to a specific policy name, and that more details can be found at a specific incident URL.'
severity: Low
requiredDataConnectors:
  - connectorId: Votiro
    dataTypes:
      - CommonSecurityLog 
  - connectorId: CefAma
    dataTypes:
      - CommonSecurityLog
queryFrequency: 10m
queryPeriod: 10m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - DefenseEvasion
  - Discovery
  - Impact
relevantTechniques:
  - T1036
  - T1083
  - T1057
  - T1082
  - T1565
  - T1498
  - T0837
query: let Votiro_view  = view () {
  VotiroEvents
  | where sanitizationResult has "Blocked" and passwordProtected == "false" and from =~ "null"
  | extend FileWithConnectorDetails = strcat_delim(' ', fileName, 'with the hash', SrcFileSHA256, 'that was sent from connector', connectorName)
  | summarize count() by fileName, SrcFileSHA256, FileWithConnectorDetails, policyName, tostring(incidentURL), sanitizationResult, LogSeverity
  | extend FileHashAlgo = "SHA256", FileHashValue = SrcFileSHA256};Votiro_view
entityMappings:
- entityType: FileHash
  fieldMappings:
    - identifier: Algorithm
      columnName: FileHashAlgo
    - identifier: Value
      columnName: FileHashValue
incidentConfiguration:
  createIncident: true
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride: 
   alertDisplayNameFormat: File with hash {{SrcFileSHA256}} was blocked
   alertDescriptionFormat: The {{FileWithConnectorDetails}} was blocked by Votiro due to Policy rules, see more detail in the following link {{incidentURL}}
   alertTacticsColumnName: sanitizationResult
   alertSeverityColumnName: LogSeverity
version: 1.0.1
kind: Scheduled

Stages and Predicates

Let binding: `Votiro_view`

let Votiro_view = view () { VotiroEvents | where sanitizationResult has "Blocked" and passwordProtected == "false" and from =~ "null" | extend FileWithConnectorDetails = strcat_delim(' ', fileName, 'with the hash', SrcFileSHA256, 'that was sent from connector', connectorName) | summarize count() by fileName, SrcFileSHA256, FileWithConnectorDetails, policyName, tostring(incidentURL), sanitizationResult, LogSeverity | extend FileHashAlgo = "SHA256", FileHashValue = SrcFileSHA256};

Stage 1: `source`

VotiroEvents

Stage 2: `where`

where from =~ "null" and passwordProtected =~ false and sanitizationResult contains "Blocked"

Stage 3: `extend`

extend FileWithConnectorDetails

Stage 4: `summarize`

summarize by fileName, SrcFileSHA256, FileWithConnectorDetails, policyName, sanitizationResult, LogSeverity

Stage 5: `extend`

extend FileHashAlgo, FileHashValue

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
`from`	eq	`null`
`passwordProtected`	eq	`false` transforms: `cased`
`sanitizationResult`	match	`Blocked` transforms: `term`

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
`FileWithConnectorDetails`	`summarize`
`LogSeverity`	`summarize`
`SrcFileSHA256`	`summarize`
`fileName`	`summarize`
`policyName`	`summarize`
`sanitizationResult`	`summarize`
`FileHashAlgo`	`extend`
`FileHashValue`	`extend`

`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)

Votiro - File Blocked from Connector

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Let binding: `Votiro_view`

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`

Stage 4: `summarize`

Stage 5: `extend`

Indicators

Output fields

Keyboard shortcuts

Search operators

Votiro - File Blocked from Connector

MITRE ATT&CK coverage

Rule body kusto

Stages and Predicates

Let binding: Votiro_view

Stage 1: source

Stage 2: where

Stage 3: extend

Stage 4: summarize

Stage 5: extend

Indicators

Output fields

Let binding: `Votiro_view`

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`

Stage 4: `summarize`

Stage 5: `extend`