Carbon Black Data Forwarder Stopped

Severity: high
Log types: CarbonBlack.Audit
Tags: Defense Evasion, Impair Defenses, Disable or Modify Cloud Logs
Reference: https://docs.vmware.com/en/VMware-Carbon-Black-Cloud/services/carbon-black-cloud-user-guide/GUID-E8D33F72-BABB-4157-A908-D8BBDB5AF349.html
Source: github.com/panther-labs/panther-analysis

Detects when a user disables or deletes a Data Forwarder.

MITRE ATT&CK coverage

Tactic	Techniques
Stealth	`T1562.008` Impair Defenses: Disable or Modify Cloud Logs

Rule body yaml

AnalysisType: rule
RuleID: "CarbonBlack.Audit.Data.Forwarder.Stopped"
LogTypes:
  - CarbonBlack.Audit
Description: "Detects when a user disables or deletes a Data Forwarder."
DisplayName: "Carbon Black Data Forwarder Stopped"
Enabled: true
Filename: cb_audit_data_forwarder_stopped.py
Severity: High
Tags:
  - Defense Evasion
  - Impair Defenses
  - Disable or Modify Cloud Logs
Reports:
  MITRE ATT&CK:
    - TA0005:T1562.008
Reference: https://docs.vmware.com/en/VMware-Carbon-Black-Cloud/services/carbon-black-cloud-user-guide/GUID-E8D33F72-BABB-4157-A908-D8BBDB5AF349.html
Threshold: 1
DedupPeriodMinutes: 60
Tests:
  - Name: Endpoint event forwarder disabled
    ExpectedResult: true
    Log:
      {
        "clientIp": "12.34.56.78",
        "description": "Updated Config: {\"id\":\"b6ab1fb9-61f6-11ee-9e9b-5655adf4bf96\",\"org_key\":\"A1234567\",\"name\":\"endpoint event\",\"enabled\":false,\"s3_bucket_name\":\"carbonblackbucket\",\"s3_prefix\":\"endpoint\",\"type\":\"endpoint.event\",\"create_time\":\"2023-10-03T14:11:14Z\",\"update_time\":\"2023-11-14T19:16:43Z\"}\n",
        "eventId": "58bef441832211ee83ef1721d866b8d6",
        "eventTime": "2023-11-14 19:16:43.123000000",
        "flagged": false,
        "loginName": "bob.ross@acme.com",
        "orgName": "bob.ross@acme.com",
        "requestUrl": "/data_forwarder/v2/orgs/A1234567/configs/b6ab1fb9-61f6-11ee-9e9b-5655adf4bf96",
        "verbose": false,
      }
  - Name: Endpoint event forwarder updated
    ExpectedResult: false
    Log:
      {
        "clientIp": "12.34.56.78",
        "description": "Updated Config: {\"id\":\"b6ab1fb9-61f6-11ee-9e9b-5655adf4bf96\",\"org_key\":\"A1234567\",\"name\":\"endpoint event\",\"enabled\":true,\"s3_bucket_name\":\"carbonblackbucket\",\"s3_prefix\":\"endpoint\",\"type\":\"endpoint.event\",\"create_time\":\"2023-10-03T14:11:14Z\",\"update_time\":\"2023-11-14T19:16:43Z\"}\n",
        "eventId": "58bef441832211ee83ef1721d866b8d6",
        "eventTime": "2023-11-14 19:16:43.123000000",
        "flagged": false,
        "loginName": "bob.ross@acme.com",
        "orgName": "bob.ross@acme.com",
        "requestUrl": "/data_forwarder/v2/orgs/A1234567/configs/b6ab1fb9-61f6-11ee-9e9b-5655adf4bf96",
        "verbose": false,
      }

Detection logic

Condition

requestUrl starts_with "/data_forwarder/"
description starts_with "Deleted Config: " or (description starts_with "Updated Config: " and description contains "\"enabled\":false")

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

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
`description`	contains	`"enabled":false`
`description`	starts_with	`Deleted Config:` `Updated Config:`
`requestUrl`	starts_with	`/data_forwarder/`

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
`loginName`
`clientIp`

`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)