Ibrahim Saud
@tektrixIndiaCompletionist
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This rule detects administrative changes to Conditional Access (CA) policies in Entra ID (Azure AD), specifically monitoring for the disabling of policies, transitioning them to report-only mode, or the removal of critical security grant controls such as MFA or Compliant Device requirements. It also alerts on the outright deletion of any CA policy, which could indicate an adversary attempting to bypass security controls or maintain persistent access.
Detects instances where a user grants OAuth consent or assigns roles to an application that lacks a verified publisher and requests broad permissions across multiple sensitive categories (e.g., Mail, Files, and Directory). This behavior is characteristic of consent-phishing campaigns designed to harvest data from cloud environments.
This rule detects when a new password credential (client secret) is added to an existing Azure AD Service Principal or application. This activity is a common method for adversaries to establish persistence in a cloud environment that survives password resets or MFA enforcement on the original administrative account.
Detects anomalous cross-account AssumeRole activities, including chained role assumptions, which are often used by cloud-native intrusion sets to launder access, evade single-account logging detection, and move laterally across AWS environments. The rule identifies AssumeRole events targeting non-allowlisted accounts or sequences where credentials are immediately used to perform further cross-account assumptions.
Detects modifications to EBS or RDS snapshot permissions that grant access to the public 'all' group or an external AWS account ID. This activity is a common method for exfiltrating sensitive data via unauthorized cross-account sharing, bypassing standard VPC egress monitoring and DLP controls.
Detects unauthorized attempts to stop, delete, or reduce the scope of AWS CloudTrail logging. Attackers frequently perform these actions to blind defenders before conducting large-scale resource abuse or ransomware activities. This rule monitors for StopLogging, DeleteTrail, and configuration changes (UpdateTrail, PutTrail) that weaken log integrity such as disabling multi-region tracking, global service events, or log file validation.
Detects the creation of a new AWS IAM access key by a user for an account other than their own. This is a common persistence technique where an attacker, having obtained sufficient permissions, creates a new credential set for an existing, potentially dormant user account to maintain long-term access while blending in with legitimate activity.
Detects anomalous, large-scale provisioning of GPU-intensive cloud instances (such as p3, p4, g4dn, g5, and trn1 families) in AWS. This activity is indicative of cloud cryptojacking campaigns where adversaries hijack resources to rapidly spin up compute clusters for cryptomining, potentially incurring significant financial damage within a short period.
Detects attempts to tamper with or disable AWS security monitoring controls, specifically GuardDuty detectors and AWS Config recording. Attackers frequently disable these services to evade detection after gaining administrative permissions in a cloud environment.
This rule detects the creation of compute resources (EC2 instances, launch templates, or spot instances) within AWS regions that are designated as dormant or rarely used. This behavior is a common indicator of regional 'region-hopping,' used by attackers for cryptojacking or establishing C2 infrastructure to evade detection, particularly in regions where monitoring and cost-based alerts are less mature.
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