Ibrahim Saud
@tektrixIndiaCompletionist
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This rule detects anomalous activity involving cloud-based shell services (AWS CloudShell, Azure Cloud Shell, GCP Cloud Shell). It triggers on two main conditions: (1) First-time usage of these shell environments by a principal within the detection window, and (2) The execution of commands associated with data staging, ingress tool transfer, or exfiltration (e.g., curl, wget, storage copy commands).
Detects unauthorized or suspicious modifications to audit and logging configurations across AWS, Azure, and GCP. The rule identifies actions such as stopping, deleting, or updating logging trails, diagnostic settings, or logging sinks, which may indicate an adversary attempting to impair visibility into their activities (Anti-Forensics).
Detects the assignment of high-privilege Azure directory roles to a service principal identity. Threat actors may leverage this behavior to establish persistent, non-interactive backdoor access in a cloud tenant, bypassing MFA and sign-in scrutiny.
Detects modifications to Azure AD/Entra ID security configurations that lower the security posture, specifically the disabling of Security Defaults, per-user MFA requirements, or strong authentication enforcement. This is often a precursor to account takeover or persistence following unauthorized administrative access.
Detects the creation or modification of Kubernetes RoleBindings or ClusterRoleBindings that grant highly privileged roles (e.g., cluster-admin or wildcard permissions) to a subject. The detection includes behavioral analysis to identify ServiceAccount usage from unusual source IP addresses within a short timeframe, which may indicate account compromise and unauthorized privilege escalation.
Detects high-volume or multi-type destructive operations against cloud backup, snapshot, and recovery infrastructure, including the disabling of immutability policies or soft-delete protections. This activity is consistent with ransomware actors attempting to eliminate recovery options before encrypting data.
Detects the modification of an Azure Storage account configuration to enable public access (allowBlobPublicAccess: true). This activity is often associated with attackers attempting to facilitate anonymous data exfiltration by enabling public access to blobs and subsequently reading them.
This rule detects potential browser-based credential and session theft by monitoring for a process that accesses multiple sensitive web browser artifacts (cookies, local state, session storage) across several user profiles in a short timeframe. It correlates this activity with the subsequent creation of a compressed archive in a temporary directory followed by an outbound network connection, indicating a multi-stage exfiltration workflow.
Detects two distinct suspicious patterns: first, the deletion of executable files residing in common user-writable temporary directories (e.g., Temp, Downloads, AppData) using command-line tools like 'del' or 'erase', which is often indicative of anti-forensic activity after malware execution. Second, it monitors for network traffic involving HTTP POST requests or specific SOAP headers related to 'tempuri.org', which are commonly associated with default .NET WCF service scaffolding and may be used by adversaries for C2 communication or exfiltration.
Detects instances where a user account associated with a detected infostealer malware infection (e.g., Redline, Raccoon, Vidar) successfully authenticates to a cloud service from a suspicious network location, such as a VPN, residential proxy, or Tor exit node, within 24 hours of the infection alert.
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