Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal.
This rule detects attempts to access non-existent AWS S3 buckets, indicated by the 'NoSuchBucket' error code in CloudTrail logs. This could signify reconnaissance activities by an attacker attempting to enumerate accessible S3 buckets or misconfigurations in applications trying to access buckets that no longer exist or have incorrect names. The rule extracts the bucket name and host from the request parameters for further investigation.
Detects activity when someone is changing passwords on behalf of other users.
An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
An attacker with the "iam:UpdateLoginProfile" permission on other users can change the password used to login to the AWS console on any user that already has a login profile setup.
Detects when a transfer lock was removed from a Route 53 domain. It is recommended to refrain from performing this action unless intending to transfer the domain to a different registrar.
Detects the use of TruffleHog for AWS credential validation by identifying GetCallerIdentity API calls where the userAgent indicates TruffleHog.
Threat actors leverage TruffleHog to enumerate and validate exposed AWS keys.
Successful exploitation allows threat actors to confirm the validity of compromised AWS credentials, facilitating further unauthorized access and actions within the AWS environment.
Threat actors leverage TruffleHog to enumerate and validate exposed AWS keys.
Successful exploitation allows threat actors to confirm the validity of compromised AWS credentials, facilitating further unauthorized access and actions within the AWS environment.
Detects failed AWS console login attempts due to authentication failures. Monitoring these events is crucial for identifying potential brute-force attacks or unauthorized access attempts to AWS accounts.
Detects the use of the EnableRegion command in AWS CloudTrail logs.
While AWS has 30+ regions, some of them are enabled by default, others must be explicitly enabled in each account separately.
There may be situations where security monitoring does not cover some new AWS regions.
Monitoring the EnableRegion command is important for identifying potential persistence mechanisms employed by adversaries, as enabling additional regions can facilitate continued access and operations within an AWS environment.
While AWS has 30+ regions, some of them are enabled by default, others must be explicitly enabled in each account separately.
There may be situations where security monitoring does not cover some new AWS regions.
Monitoring the EnableRegion command is important for identifying potential persistence mechanisms employed by adversaries, as enabling additional regions can facilitate continued access and operations within an AWS environment.
This analytic detects instances where an internal host attempts to communicate with over 500 ports on a single destination IP address. It includes filtering criteria to exclude applications performing scans over ephemeral port ranges, focusing on potential reconnaissance or scanning activities. Monitoring network traffic logs allows for timely detection and response to such behavior, enhancing network security by identifying and mitigating potential threats promptly.
Detects the use of AWS IAM Policy Simulator APIs (SimulatePrincipalPolicy, SimulateCustomPolicy), which can indicate a threat actor is enumerating permissions to find privilege escalation paths.
Detects modification of an AWS IAM role's trust policy to include a principal from an unknown or untrusted AWS account. This is a common persistence technique used by attackers to maintain access to a compromised environment by allowing their external account to assume the role.
The following analytic detects attempts to impair or disable AWS security services by monitoring specific deletion operations across GuardDuty, AWS WAF (classic and v2), CloudWatch, Route 53, and CloudWatch Logs. These actions include deleting detectors, rule groups, IP sets, web ACLs, logging configurations, alarms, and log streams. Adversaries may perform such operations to evade detection or remove visibility from defenders. By explicitly pairing eventName values with their corresponding eventSource services, this detection reduces noise and ensures that only security-related deletions are flagged. It leverages CloudTrail logs to identify specific API calls like "DeleteLogStream" and "DeleteDetector." This activity is significant because it indicates potential efforts to disable security monitoring and evade detection. If confirmed malicious, this could allow attackers to operate undetected, escalate privileges, or exfiltrate data without triggering security alerts, severely compromising the security posture of the AWS environment.
This analytic identifies instances where an internal host has attempted to communicate with 250 or more destination IP addresses using the same port and protocol. Horizontal port scans from internal hosts can indicate reconnaissance or scanning activities, potentially signaling malicious intent or misconfiguration. By monitoring network traffic logs, this detection helps detect and respond to such behavior promptly, enhancing network security and preventing potential threats.
This analytic identifies instances where an internal host has attempted to communicate with 250 or more destination IP addresses using one of the NMAP top 20 ports. Horizontal port scans from internal hosts can indicate reconnaissance or scanning activities, potentially signaling malicious intent or misconfiguration. By monitoring network traffic logs, this detection helps detect and respond to such behavior promptly, enhancing network security and preventing potential threats.
Detects potential data exfiltration from cloud storage or SaaS platforms based on a large volume of data transferred or a high number of distinct files accessed by a single user or application within a one-hour window. This is a common TTP for threat actors like ShinyHunters who aim to steal large datasets.
This rule detects potential enumeration of AWS S3 buckets by looking for the 'ListBuckets' API call in AWS CloudTrail logs. It specifically filters out activities performed by 'AssumedRole' identities to reduce false positives from legitimate automated processes or services.
Detects a single S3 object download event where the volume of data transferred exceeds a defined threshold. This can be an indicator of bulk data exfiltration. Attackers may download large archives or databases from compromised S3 buckets.
Detects the addition of a new network route to a route table in AWS. This activity can be indicative of an adversary attempting to reroute traffic for C2, exfiltration, or to bypass network controls.
This rule detects when AWS Config service components, specifically delivery channels or configuration recorders, are disabled. Adversaries may disable these services to impair an organization's ability to monitor and audit changes within their AWS environment, thereby hindering detection of malicious activities.
This rule detects critical changes to AWS CloudTrail configurations, specifically when a CloudTrail is stopped (StopLogging), updated (UpdateTrail), or deleted (DeleteTrail). These actions can indicate an attempt by an attacker to evade detection by disabling or modifying logging capabilities to obscure their activities within the AWS environment.
This rule detects the creation of new network Access Control List (ACL) entries within an AWS route table. Such an event could indicate that new network access vectors have been opened, potentially allowing unauthorized access or facilitating malicious activities within the AWS environment. This is a critical security event as it directly impacts network segmentation and access control.
A post-authentication vulnerability (CVE-2025-53786) in Microsoft Exchange hybrid-joined configurations.
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