Snowflake File Downloaded

Severity: informational
Log types: Snowflake.QueryHistory
Tags: Snowflake, [MITRE] Exfiltration, [MITRE] Exfiltration Over C2 Channel
Reference: https://cloud.google.com/blog/topics/threat-intelligence/unc5537-snowflake-data-theft-extortion/
Source: github.com/panther-labs/panther-analysis

A file was downloaded from a stage.

MITRE ATT&CK coverage

Tactic	Techniques
Exfiltration	`T1041` Exfiltration Over C2 Channel

Rule body yaml

AnalysisType: rule
Filename: snowflake_stream_file_downloaded.py
RuleID: Snowflake.Stream.FileDownloaded
DisplayName: Snowflake File Downloaded
Enabled: true
LogTypes:
  - Snowflake.QueryHistory
Severity: Info
CreateAlert: false
Reports:
  MITRE ATT&CK:
    - TA0010:T1041 # Exfiltration Over C2 Channel
Description: A file was downloaded from a stage.
Reference: 
  https://cloud.google.com/blog/topics/threat-intelligence/unc5537-snowflake-data-theft-extortion/
Tags:
  - Snowflake
  - '[MITRE] Exfiltration'
  - '[MITRE] Exfiltration Over C2 Channel'
Tests:
  - Name: Worksheet File Downloaded
    ExpectedResult: false
    Log:
      {
        "p_event_time": "2024-10-09 19:38:06.158000000",
        "p_log_type": "Snowflake.QueryHistory",
        "p_source_label": "SF-Ben",
        "EXECUTION_STATUS": "SUCCESS",
        "QUERY_TEXT": "GET '@~/worksheet_data/metadata' 'file:///'",
        "QUERY_TYPE": "GET_FILES",
        "ROLE_NAME": "PUBLIC",
        "USER_NAME": "CLARK_KENT"
      }
  - Name: Other File Downloaded
    ExpectedResult: true
    Log:
      {
        "p_event_time": "2024-10-09 19:38:06.158000000",
        "p_log_type": "Snowflake.QueryHistory",
        "p_source_label": "SF-Ben",
        "EXECUTION_STATUS": "SUCCESS",
        "QUERY_TEXT": "GET @PANTHER_LOGS.PUBLIC.data_exfil/DATA.csv 'file:///Users/lex.luthor/Documents'",
        "QUERY_TYPE": "GET_FILES",
        "ROLE_NAME": "PUBLIC",
        "USER_NAME": "LEX_LUTHOR"
      }

Detection logic

Condition

QUERY_TYPE eq "GET_FILES"
EXECUTION_STATUS eq "SUCCESS"
QUERY_TEXT ne "GET '@~/worksheet_data/metadata' 'file:///'"

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
`EXECUTION_STATUS`	eq	`SUCCESS`
`QUERY_TEXT`	ne	`GET '@~/worksheet_data/metadata' 'file:///'`
`QUERY_TYPE`	eq	`GET_FILES`

`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)