Detections

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

2,982 detections

Detects phishing emails containing QR codes rendered using HTML tables. This technique is used to evade image-based scanning and OCR security controls by representing the QR code as a grid of small, colored table cells (<td>) instead of a traditional image file.
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Tim Peck@timpeck
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Detections.ai Community
10 months ago
93116
This detects events in Okta where there is the eventType of "user.session.impersonation.grant".
This grants access in the context of the user. This could be high privilege admin access.
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Danny Y@zendannyy
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Detections.ai Community
10 months ago
60141
Detects events in Okta where there is the eventType of ~'policy.lifecycle' and the policy of 'OktaSignOn'.
This will capture when new signon policies are created or updated. This could allow users to authenticate to Okta where the current policy does not apply. (i.e: enforcing MFA)
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Danny Y@zendannyy
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Detections.ai Community
10 months ago
1067
Detects events in Okta where there is the eventType of "user.session.impersonation.grant".
This grants access in the context of the user. This could be high privilege admin access.
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Danny Y@zendannyy
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Detections.ai Community
10 months ago
6054
Detects suspicious email inbox rule creation indicative of account compromise. Focuses on rules with randomly-generated names or rules that move emails to low-visibility folders combined with hiding actions (mark as read, delete, stop processing).
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Tim Peck@timpeck
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Detections.ai Community
10 months ago
91200
This Query is oriented to identify Malicious URL sent via Microsoft Teams and detect possible hits based on online Malware sites reported by the TI Feed URL Haus.
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Sergio Albea@Sergio_Albea
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01 | 🇨🇭 Swiss Cyber Hunters
11 months ago
584451
Detects anomalous Okta sign-on policy evaluations originating from Cloudflare, which could indicate an Adversary-in-the-Middle (AiTM) phishing attempt. The associated campaign uses Cloudflare to host its phishing infrastructure.
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Tim Peck@timpeck
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Detections.ai Community
11 months ago
210141
Detects when an internal user successfully authenticates as a guest to an external Microsoft Teams tenant. This could be legitimate B2B collaboration, but it can also be abused by attackers to lure users into a malicious tenant where security controls (like Safe Links/Safe Attachments) are not enforced.
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Mehulkumar Savajani@Msavajani
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Detections.ai Community
11 months ago
412384
Detects creation of branches and files matching indicators used by Shai-Hulud 2.0 for exfiltration
Effy Elden@ineffyble
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Detections.ai Community
11 months ago
30156
Detects GitHub Actions activity matching indicators used by Shai-Hulud 2.0 for exfiltration and persistence
Effy Elden@ineffyble
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Detections.ai Community
11 months ago
40138
Detects when an internal user successfully authenticates as a guest to an external Microsoft Teams tenant. This could be legitimate B2B collaboration, but it can also be abused by attackers to lure users into a malicious tenant where security controls (like Safe Links/Safe Attachments) are not enforced.
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Mehulkumar Savajani@Msavajani
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Detections.ai Community
11 months ago
140151
Detects emails containing URLs with patterns characteristic of the Tycoon 2FA phishing kit. These URLs often contain a base64-encoded email address in the path, preceded by a special character.
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Tim Peck@timpeck
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Detections.ai Community
11 months ago
182241
This rule detects the creation of a public GitHub repository with the specific description "Sha1-Hulud: The Second Coming". This is an indicator of compromise (IOC) associated with the Shai-Hulud 2.0 worm, which uses these repositories to exfiltrate stolen credentials.
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Mehulkumar Savajani@Msavajani
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Detections.ai Community
11 months ago
20116
This search detects the creation of a public GitHub repository with the description "Sha1-Hulud: The Second Coming". This is a specific indicator of compromise (IOC) associated with the Shai-Hulud 2.0 worm, which uses these repositories to exfiltrate stolen credentials.
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Mehulkumar Savajani@Msavajani
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Detections.ai Community
11 months ago
0092
Detects when an administrator or help desk agent resets a user's password or deactivates/resets their MFA factors. This activity, while often legitimate, is a key tactic used by social engineering groups like Muddled Libra (aka Scattered Spider) who are known to 'vishing' (voice-phishing) IT help desks to take over accounts.
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Mehulkumar Savajani@Msavajani
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Detections.ai Community
11 months ago
5099
Detects phishing emails with malicious HTML attachments designed to harvest credentials and exfiltrate them via the Telegram Bot API. The detection looks for specific attachment filenames (e.g., RFQ, INQUIRY) or content patterns indicative of this threat.
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Tim Peck@timpeck
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Detections.ai Community
1 year ago
120205
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 successful multi-factor authentication (MFA) occurs due to the use of a bypass code in Cisco Duo. Bypass codes are temporary passcodes created by administrators for specific users to access Duo-protected applications, typically used as backup codes when users cannot use their enrolled devices. This rule identifies instances where such a bypass code facilitates a successful authentication.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
2154
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
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