Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

3,001 detections

Detects the creation of a new user account. Such accounts may be used for persistence that do not require persistent remote access tools to be deployed on the system.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
This rule detects instances where PowerShell (powershell.exe or pwsh.exe) spawns 'node.exe' with command-line arguments containing '-e' and the process path is located within the 'AppData\Roaming' or 'AppData\Local' directories. This behavior can be indicative of malicious activity, such as the execution of Node.js-based scripts or malware by PowerShell, potentially for persistence or further execution within user-specific application data folders.
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Marshall Yang@marshop
SPL Learner
1 year ago
60195
Detects various sensitive configuration modifications in AWS that could indicate malicious activity, such as privilege escalation, defense evasion, or data exposure. This rule looks for a curated list of API calls related to changes in IAM, EC2 security groups, S3 bucket policies, and logging configurations.
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ᴅᴜᴛᴄʜʙᴏʏ 😎@dutchboy
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DROID
1 year ago
180222
This rule detects new device registrations in Azure Active Directory (AAD) that originate from an IP address not previously associated with the user's account within the last 29 days. It filters out registrations from corporate IP ranges and common mobile operating systems (iOS, Android) to reduce noise. The rule categorizes the risk level of the IP address based on historical sign-in counts, focusing on 'High Risk - New IP' events. It then enriches these events with additional sign-in details like device name, risk level during sign-in, country, and city.
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Benjamin Zulliger@benscha
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Detections.ai Community
1 year ago
1649842
Detects attempts to exploit the Triofox authentication bypass vulnerability (CVE-2025-12480) by sending a request with a 'localhost' Host header from an external IP address to access administrative pages. This allows an attacker to create a new administrative account.
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Tim Peck@timpeck
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Detections.ai Community
1 year ago
2084
This detection looks for administrative activity that creates or updates Cross-Tenant Access Settings or Cross-Tenant Identity Synchronization Settings in Microsoft Entra ID (Azure AD). These settings control how identities, claims, and trust relationships are shared between Microsoft Entra tenants.
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RHys ElLis@rhysx
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Detections.ai Community
1 year ago
320358
ET WEB_SPECIFIC_APPS TVT queryDevInfo Information Disclosure (CVE-2024-7339)
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Tim Peck@timpeck
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Proofpoint Emerging Threats Rules
1 year ago
0018
See what commands are being input into the device by other people, full credentials can be in the history
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
Modifications to a config that will serve an adversary's impacts or persistence
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
Various protocols maybe used to put data on the device for exfil or infil
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
Show when a monitor or a span/rspan is setup or modified
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
Detects the Installation of a Exchange Transport Agent
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
11 months ago
000
This rule detects the presence of 'activeMQConnectionURL' and 'tcp://' within HTTP response bodies, which is indicative of a Commvault server exposing its hostname or connection details. This information could be leveraged by attackers for reconnaissance or to identify vulnerable Commvault instances.
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Tim Peck@timpeck
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Proofpoint Emerging Threats Rules
1 year ago
0019
Detects the creation of a new administrator account on a Fortinet FortiGate Firewall. This activity could indicate an attacker establishing persistence or escalating privileges within the network infrastructure.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
40143
Detects when a new administrator role assignment is created within Okta. This activity can indicate privilege escalation, where an attacker gains higher-level permissions, or persistence, where an attacker establishes a way to maintain access to the system over time.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0057
This rule detects when GitHub's push protection feature is disabled. This feature helps prevent sensitive information, such as secrets, from being accidentally committed to repositories. Disabling it could indicate an attempt to bypass security controls, potentially allowing secrets to be exposed in code.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
2056
Detects when an administrator role is assigned to a user or group within Okta. This could indicate privilege escalation or persistence by an attacker, or a legitimate administrative action.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0055
Detects when a full data export is initiated in Bitbucket. This event indicates that a complete backup or export of all data within the Bitbucket instance has been triggered. This could be a legitimate administrative action but also a precursor to data exfiltration by an attacker who has gained administrative access to the Bitbucket server.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
1053
Detects when a new member is added or invited to a GitHub organization. This activity could indicate an attempt by an adversary to gain persistence within an organization's GitHub environment by adding a controlled account or inviting a malicious user.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
1053
This rule detects when a user disables critical security features within a GitHub organization or repository. This includes disabling advanced security features, OAuth app access restrictions, or two-factor authentication requirements. Such actions can significantly weaken the security posture of a GitHub environment, potentially leading to unauthorized access or compromise.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
2050
Detects when an organization member or an outside collaborator is added to or removed from a project board or has their permission level changed or when an owner removes an outside collaborator from an organization or when two-factor authentication is required in an organization and an outside collaborator does not use 2FA or disables 2FA.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
1050
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