Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Snowflake Brute Force Tuning #1477

Merged
merged 1 commit into from
Jan 17, 2025
Merged

Snowflake Brute Force Tuning #1477

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 14 additions & 1 deletion rules/snowflake_rules/snowflake_stream_brute_force_by_ip.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,7 +1,12 @@
def rule(event):
# Return true for any login attempt; Let Panther's dedup and threshold handle the brute force
# detection.
return event.get("EVENT_TYPE") == "LOGIN" and event.get("IS_SUCCESS") == "NO"
return (
event.get("EVENT_TYPE") == "LOGIN"
and event.get("IS_SUCCESS") == "NO"
and event.get("ERROR_MESSAGE") != "OVERFLOW_FAILURE_EVENTS_ELIDED"
# ^^ OVERFLOW_FAILURE_EVENTS_ELIDED are placeholder logs -> no point in alerting
)


def title(event):
Expand All @@ -12,6 +17,14 @@ def title(event):
)


def severity(event):
# If the error appears to be caused by an automation issue, downgrade to INFO
common_errors = {"JWT_TOKEN_INVALID_PUBLIC_KEY_FINGERPRINT_MISMATCH"}
if event.get("ERROR_MESSAGE") in common_errors:
return "INFO"
return "DEFAULT"


def dedup(event):
return event.get("CLIENT_IP", "<UNKNOWN IP>") + event.get(
"REPORTED_CLIENT_TYPE", "<UNKNOWN CLIENT TYPE>"
Expand Down
39 changes: 39 additions & 0 deletions rules/snowflake_rules/snowflake_stream_brute_force_by_ip.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -54,3 +54,42 @@ Tests:
"REPORTED_CLIENT_VERSION": "1.11.1",
"USER_NAME": "[email protected]"
}
- Name: Unsuccessful Login due to Invalid JWT Fingerprint
ExpectedResult: true
Log:
{
"p_event_time": "2024-10-08 14:38:46.061000000",
"p_log_type": "Snowflake.LoginHistory",
"p_source_label": "Snowflake Prod",
"CLIENT_IP": "1.2.3.4",
"ERROR_CODE": 394304,
"ERROR_MESSAGE": "JWT_TOKEN_INVALID_PUBLIC_KEY_FINGERPRINT_MISMATCH",
"EVENT_ID": "393754014361778",
"EVENT_TIMESTAMP": "2024-10-08 14:38:46.061000000",
"EVENT_TYPE": "LOGIN",
"FIRST_AUTHENTICATION_FACTOR": "PASSWORD",
"IS_SUCCESS": "NO",
"RELATED_EVENT_ID": "0",
"REPORTED_CLIENT_TYPE": "OTHER",
"REPORTED_CLIENT_VERSION": "1.11.1",
"USER_NAME": "[email protected]"
}
- Name: Overflow Failure
ExpectedResult: false
Log:
{
"p_event_time": "2024-11-15 00:12:24.288000000",
"p_log_type": "Snowflake.LoginHistory",
"p_parse_time": "2024-11-15 02:46:25.862374468",
"CLIENT_IP": "0.0.0.0",
"ERROR_CODE": 390156,
"ERROR_MESSAGE": "OVERFLOW_FAILURE_EVENTS_ELIDED",
"EVENT_ID": "16592193114297018",
"EVENT_TIMESTAMP": "2024-11-15 00:12:24.288000000",
"EVENT_TYPE": "LOGIN",
"IS_SUCCESS": "NO",
"RELATED_EVENT_ID": "0",
"REPORTED_CLIENT_TYPE": "OTHER",
"REPORTED_CLIENT_VERSION": "0",
"USER_NAME": "[email protected]"
}
15 changes: 14 additions & 1 deletion rules/snowflake_rules/snowflake_stream_brute_force_by_username.py
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,7 +1,12 @@
def rule(event):
# Return true for any login attempt; Let Panther's dedup and threshold handle the brute force
# detection.
return event.get("EVENT_TYPE") == "LOGIN" and event.get("IS_SUCCESS") == "NO"
return (
event.get("EVENT_TYPE") == "LOGIN"
and event.get("IS_SUCCESS") == "NO"
and event.get("ERROR_MESSAGE") != "OVERFLOW_FAILURE_EVENTS_ELIDED"
# ^^ OVERFLOW_FAILURE_EVENTS_ELIDED are placeholder logs -> no point in alerting
)


def title(event):
Expand All @@ -10,6 +15,14 @@ def title(event):
)


def severity(event):
# If the error appears to be caused by an automation issue, downgrade to INFO
common_errors = {"JWT_TOKEN_INVALID_PUBLIC_KEY_FINGERPRINT_MISMATCH"}
if event.get("ERROR_MESSAGE") in common_errors:
return "INFO"
return "DEFAULT"


def dedup(event):
return event.get("USER_NAME", "<UNKNOWN USER>") + event.get(
"REPORTED_CLIENT_TYPE", "<UNKNOWN CLIENT TYPE>"
Expand Down
39 changes: 39 additions & 0 deletions rules/snowflake_rules/snowflake_stream_brute_force_by_username.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -54,3 +54,42 @@ Tests:
"REPORTED_CLIENT_VERSION": "1.11.1",
"USER_NAME": "[email protected]"
}
- Name: Unsuccessful Login due to Invalid JWT Fingerprint
ExpectedResult: true
Log:
{
"p_event_time": "2024-10-08 14:38:46.061000000",
"p_log_type": "Snowflake.LoginHistory",
"p_source_label": "Snowflake Prod",
"CLIENT_IP": "1.2.3.4",
"ERROR_CODE": 394304,
"ERROR_MESSAGE": "JWT_TOKEN_INVALID_PUBLIC_KEY_FINGERPRINT_MISMATCH",
"EVENT_ID": "393754014361778",
"EVENT_TIMESTAMP": "2024-10-08 14:38:46.061000000",
"EVENT_TYPE": "LOGIN",
"FIRST_AUTHENTICATION_FACTOR": "PASSWORD",
"IS_SUCCESS": "NO",
"RELATED_EVENT_ID": "0",
"REPORTED_CLIENT_TYPE": "OTHER",
"REPORTED_CLIENT_VERSION": "1.11.1",
"USER_NAME": "[email protected]"
}
- Name: Overflow Failure
ExpectedResult: false
Log:
{
"p_event_time": "2024-11-15 00:12:24.288000000",
"p_log_type": "Snowflake.LoginHistory",
"p_parse_time": "2024-11-15 02:46:25.862374468",
"CLIENT_IP": "0.0.0.0",
"ERROR_CODE": 390156,
"ERROR_MESSAGE": "OVERFLOW_FAILURE_EVENTS_ELIDED",
"EVENT_ID": "16592193114297018",
"EVENT_TIMESTAMP": "2024-11-15 00:12:24.288000000",
"EVENT_TYPE": "LOGIN",
"IS_SUCCESS": "NO",
"RELATED_EVENT_ID": "0",
"REPORTED_CLIENT_TYPE": "OTHER",
"REPORTED_CLIENT_VERSION": "0",
"USER_NAME": "[email protected]"
}
Loading