Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects mailbox items being accessed or bound by an OAuth-based application (app-only context) in Microsoft 365, filtering out expected interactive client signatures like Outlook or OWA. This behavior is indicative of potential post-compromise mailbox enumeration or data harvesting by malicious applications using stolen or illicitly granted OAuth access tokens.
Detects unauthorized non-browser processes attempting to access Chrome browser master keys or bypass App-Bound Encryption by interacting with the Chrome IElevator service, DPAPI routines, or the 'Local State' configuration file. This behavior is indicative of infostealer activity aiming to decrypt browser-stored session cookies and credentials.
Detects a sequence of events where a user performs a risky or anomalous login to Azure AD, such as from an anonymous network or an non-compliant device, followed shortly after by the registration of a new MFA method or security information. This behavior is indicative of an attacker who has compromised credentials and is attempting to establish persistence or bypass authentication controls by enrolling their own MFA device.
Detects anomalous, high-volume file download or sync activity by a single user within a 10-minute window in M365 (SharePoint/OneDrive). This behavior is indicative of bulk data exfiltration, potentially occurring after a session hijacking or account takeover, where the attacker leverages legitimate user credentials to access and export sensitive data.
Detects interactive (Logon Type 10) or network (Logon Type 3) authentication to Windows hosts originating from external, non-RFC1918 IP addresses using 'Negotiate' authentication. This pattern is indicative of potential lateral movement from a cloud-connected environment into on-premises infrastructure, specifically where an adversary might be leveraging stolen session artifacts or credentials to bypass standard Kerberos-based domain authentication.
Detects modifications to AWS S3 bucket Access Control Lists (ACLs) using the 'PutBucketAcl' API call that grant public read or write permissions. This could indicate an attempt to make sensitive data stored in S3 publicly accessible, potentially leading to data exfiltration.
Detects modifications to AWS S3 bucket Access Control Lists (ACLs) using the 'PutBucketAcl' API call that grant public read or write permissions. This could indicate an attempt to make sensitive data stored in S3 publicly accessible, potentially leading to data exfiltration.
Detects modifications to IAM role trust policies (UpdateAssumeRolePolicy) or the creation of new roles (CreateRole) where the Principal is configured with a wildcard or generic open access. This configuration enables any AWS account to assume the role, representing a significant risk for privilege escalation and persistence establishment by attackers.
Detects unauthorized attempts to stop, delete, modify, or change event selectors for AWS CloudTrail logs. This activity is indicative of an attacker attempting to disable audit logging to evade detection while performing further malicious actions in the environment.
Detects 'CreateAccessKey' API calls in AWS CloudTrail where the principal making the request is different from the target IAM user. This pattern is commonly associated with persistence mechanisms where an attacker creates additional access keys on legitimate administrator accounts to maintain stealthy access.
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