Query.VPC.DNS.Tunneling

Source: github.com/panther-labs/panther-analysis

Detect activity similar to DNS tunneling traffic in AWS VPC Logs

Rule body yaml

AnalysisType: scheduled_query
QueryName: "Query.VPC.DNS.Tunneling"
Enabled: false
Description: >
  Detect activity similar to DNS tunneling traffic in AWS VPC Logs
Query: |
  SELECT
    account_id,
    region,
    vpc_id,
    srcAddr, -- outside
    srcIds:instance as instance, -- inside

    COUNT(1) as message_count,
    ARRAY_AGG(DISTINCT query_name) as query_names
  FROM
    panther_logs.public.aws_vpcdns
  WHERE
    p_occurs_since(3600) -- 1 hour in seconds
    AND
    -- simple allowlisting
    query_name NOT LIKE '%amazonaws.com'
  GROUP BY
    1,2,3,4,5
  HAVING
    message_count >= 1000   -- decent amount of activity in an hour
    AND
    ARRAY_SIZE(query_names) <= 2 -- only a small number of distinct domains (not likely a real dns server!)
Schedule:
  RateMinutes: 60
  TimeoutMinutes: 1

Detection logic

Stage 1: `source`

panther_logs.public.aws_vpcdns

Stage 2: `filter`

query_name not wildcard "*amazonaws.com"

Stage 3: `having`

message_count ge "1000"

This rule also runs imperative logic the parser cannot express as a filter; the conditions above are the structured part it could extract.

Exclusions

Top-level NOT(...) conjuncts: predicates this rule actively suppresses.

Field	Kind	Excluded values
`query_name`	ends_with	`amazonaws.com`

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
`message_count`	ge	`1000`

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
`account_id`
`region`
`vpc_id`
`srcAddr`
`instance`	`srcIds:instance`
`message_count`	`COUNT ( 1 )`
`query_names`	`ARRAY_AGG ( DISTINCT query_name )`

`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)

Query.VPC.DNS.Tunneling

Rule body yaml

Detection logic

Stage 1: `source`

Stage 2: `filter`

Stage 3: `having`

Exclusions

Indicators

Output fields

Keyboard shortcuts

Search operators

Query.VPC.DNS.Tunneling

Rule body yaml

Detection logic

Stage 1: source

Stage 2: filter

Stage 3: having

Exclusions

Indicators

Output fields

Stage 1: `source`

Stage 2: `filter`

Stage 3: `having`