* [New Rule] Web Server Unusual User Agent Request
* [New Rule] Web Server Suspicious User Agent Request Spike
* Update reconnaissance_web_server_unusual_user_agents.toml
* Update reconnaissance_web_server_unusual_user_agents.toml
* ++
* ++
* Rename rule for suspicious user agent requests
* fixing from indices formatting
---------
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: terrancedejesus <terrance.dejesus@elastic.co>
* [New] Alerts in Different ATT&CK Tactics by Host
Using ES|QL and alerts risk score to identify top risky hosts based on presence of multiple alert touching at least 4 unique tactics in a 24h time Window.
* Update multiple_alerts_risky_host_esql.toml
* Update multiple_alerts_risky_host_esql.toml
* Update multiple_alerts_risky_host_esql.toml
* Update multiple_alerts_risky_host_esql.toml
* Update multiple_alerts_risky_host_esql.toml
* Update non-ecs-schema.json
* ++
* Update multiple_alerts_edr_elastic_defend_by_host.toml
---------
Co-authored-by: shashank-elastic <91139415+shashank-elastic@users.noreply.github.com>
* [New] SOCKS Traffic from an Unusual Process
This detection correlates FortiGate's application control SOCKS events with Elastic Defend network event to identify the
source process performing SOCKS traffic. Adversaries may use a connection proxy to direct network traffic between systems
or act as an intermediary for network communications to a command and control server to avoid direct connections to their
infrastructure.
* Update command_and_control_socks_fortigate_endpoint.toml
* Update command_and_control_socks_fortigate_endpoint.toml
* Update rules/cross-platform/command_and_control_socks_fortigate_endpoint.toml
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Update command_and_control_socks_fortigate_endpoint.toml
* add fortinet schema and manif
* Update rules/cross-platform/command_and_control_socks_fortigate_endpoint.toml
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
* Update rules/cross-platform/command_and_control_socks_fortigate_endpoint.toml
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
* Update pyproject.toml
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
* rule-tuning: Elastic Agent service termination improve for detection
* [Rule Tuning]: Elastic Agent Service terminated, updated date field
* Enhance detection rules for stopping Elastic Agent
* Fix syntax for process name checks in TOML file
---------
Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
* Revise USB device mounting detection rule
Updated detection rule for USB device mounting to use device serial number instead of friendly name. Enhanced investigation steps and response actions for better clarity.
* Update initial_access_exfiltration_new_usb_device_mounted.toml
* Update rules/cross-platform/initial_access_exfiltration_new_usb_device_mounted.toml
* Update initial_access_exfiltration_new_usb_device_mounted.toml
---------
Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
* adjusted Potential Widespread Malware Infection Across Multiple Hosts
* adjusted Microsoft Azure or Mail Sign-in from a Suspicious Source
* adjusted AWS EC2 Multi-Region DescribeInstances API Calls
* adjusted AWS Discovery API Calls via CLI from a Single Resource
* adjusted AWS Service Quotas Multi-Region Requests
* adjusted AWS EC2 EBS Snapshot Shared or Made Public
* adjusted AWS S3 Bucket Enumeration or Brute Force
* adjusted AWS EC2 EBS Snapshot Access Removed
* adjusted Potential AWS S3 Bucket Ransomware Note Uploaded
* adjusted AWS S3 Object Encryption Using External KMS Key
* adjusted AWS S3 Static Site JavaScript File Uploaded
* adjusted AWS Access Token Used from Multiple Addresses
* adjusted AWS Signin Single Factor Console Login with Federated User
* adjusted AWS IAM AdministratorAccess Policy Attached to Group
* adjusted AWS IAM AdministratorAccess Policy Attached to Role
* adjusted AWS IAM AdministratorAccess Policy Attached to User
* adjusted AWS Bedrock Invocations without Guardrails Detected by a Single User Over a Session
* adjusted AWS Bedrock Guardrails Detected Multiple Violations by a Single User Over a Session
* adjusted AWS Bedrock Guardrails Detected Multiple Policy Violations Within a Single Blocked Request
* adjusted Unusual High Confidence Content Filter Blocks Detected
* adjusted Potential Abuse of Resources by High Token Count and Large Response Sizes
* AWS Bedrock Detected Multiple Attempts to use Denied Models by a Single User
* Unusual High Denied Sensitive Information Policy Blocks Detected
* adjusted Unusual High Denied Topic Blocks Detected
* adjusted AWS Bedrock Detected Multiple Validation Exception Errors by a Single User
* adjusted Unusual High Word Policy Blocks Detected
* adjusted Microsoft Entra ID Concurrent Sign-Ins with Suspicious Properties
* adjusted Azure Entra MFA TOTP Brute Force Attempts
* adjusted Microsoft Entra ID Sign-In Brute Force Activity
* adjusted Microsoft Entra ID Exccessive Account Lockouts Detected
* adjusted Microsoft 365 Brute Force via Entra ID Sign-Ins
* deprecated Azure Entra Sign-in Brute Force Microsoft 365 Accounts by Repeat Source
* adjusted Microsoft Entra ID Session Reuse with Suspicious Graph Access
* adjusted Suspicious Microsoft OAuth Flow via Auth Broker to DRS
* adjusted Potential Denial of Azure OpenAI ML Service
* adjusted Azure OpenAI Insecure Output Handling
* adjusted Potential Azure OpenAI Model Theft
* adjusted M365 OneDrive Excessive File Downloads with OAuth Token
* adjusted Multiple Microsoft 365 User Account Lockouts in Short Time Window
* adjusted Potential Microsoft 365 User Account Brute Force
* adjusted Suspicious Microsoft 365 UserLoggedIn via OAuth Code
* adjusted Multiple Device Token Hashes for Single Okta Session
* adjusted Multiple Okta User Authentication Events with Client Address
* adjusted Multiple Okta User Authentication Events with Same Device Token Hash
* adjusted High Number of Okta Device Token Cookies Generated for Authentication
* adjusted Okta User Sessions Started from Different Geolocations
* adjusted High Number of Egress Network Connections from Unusual Executable
* adjusted Unusual Base64 Encoding/Decoding Activity
* adjusted Potential Port Scanning Activity from Compromised Host
* adjusted Potential Subnet Scanning Activity from Compromised Host
* adjusted Unusual File Transfer Utility Launched
* adjusted Potential Malware-Driven SSH Brute Force Attempt
* adjusted Unusual Process Spawned from Web Server Parent
* adjusted Unusual Command Execution from Web Server Parent
* adjusted Rare Connection to WebDAV Target
* adjusted Potential PowerShell Obfuscation via Invalid Escape Sequences
* adjusted Potential PowerShell Obfuscation via Backtick-Escaped Variable Expansion
* adjusted Unusual File Creation by Web Server
* adjusted Potential PowerShell Obfuscation via High Special Character Proportion
* adjusted Potential Malicious PowerShell Based on Alert Correlation
* adjusted Potential PowerShell Obfuscation via Character Array Reconstruction
* adjusted Potential PowerShell Obfuscation via String Reordering
* adjusted Potential PowerShell Obfuscation via String Concatenation
* adjusted Potential PowerShell Obfuscation via Reverse Keywords
* adjusted PowerShell Obfuscation via Negative Index String Reversal
* adjusted Dynamic IEX Reconstruction via Method String Access
* adjusted Potential Dynamic IEX Reconstruction via Environment Variables
* adjusted Potential PowerShell Obfuscation via High Numeric Character Proportion
* adjusted Potential PowerShell Obfuscation via Concatenated Dynamic Command Invocation
* adjusted Rare Connection to WebDAV Target
* adjusted Potential PowerShell Obfuscation via Invalid Escape Sequences
* adjusted Potential PowerShell Obfuscation via Backtick-Escaped Variable Expansion
* adjusted Potential PowerShell Obfuscation via Character Array Reconstruction
* adjusted Potential PowerShell Obfuscation via High Special Character Proportion
* adjusted Potential PowerShell Obfuscation via Special Character Overuse
* adjusted Potential PowerShell Obfuscation via String Reordering
* adjusted Suspicious Microsoft 365 UserLoggedIn via OAuth Code
* adjusted fields that were inconsistent
* adjusted additional fields
* adjusted esql to Esql
* adjusted several rules for common field names
* updating rules
* updated dates
* updated dates
* updated ESQL fields
* lowercase all functions and logical operators
* adjusted dates for unit tests
* Update Esql_priv to Esql_temp as these don't hold PII
* PowerShell adjustments
* Make query comments consistent
* update comment
* reverted 2856446a-34e6-435b-9fb5-f8f040bfa7ed
* Update rules/windows/discovery_command_system_account.toml
* removed dot notation
---------
Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com>
* [Rule Tuning] Tighten Up Windows EventLog Indexes, Improve tags
* Format & order
* Update pyproject.toml
* Update credential_access_cookies_chromium_browsers_debugging.toml
* [Rule Tuning] Linux DR Tuning - Part 6
* Update privilege_escalation_ld_preload_shared_object_modif.toml
* Update privilege_escalation_ld_preload_shared_object_modif.toml
* rule tuning Okta and AWS lookback times
* adjusted Query Registry using Built-in Tools
* adjusted My First Rule
* Update rules/cross-platform/guided_onboarding_sample_rule.toml
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
* Update rules/integrations/okta/lateral_movement_multiple_sessions_for_single_user.toml
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
---------
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
* [Rule Tuning] Active Directory Forced Authentication from Linux Host - SMB Named Pipes
* Update rules/cross-platform/credential_access_forced_authentication_pipes.toml
* updating ES|QL rules to include KEEP command
* fixed some ES|QL rules with typos; added validation for KEEP command
* fixed ES|QL errors from missing fields
* fixed flake errors
* updated date
* added best practices to hunt docs
Ruben Groenewoud