Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
222 detections
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Detects a Google Workspace OAuth application grant and application-specific password issuance occurring within 30 minutes of a suspicious/AiTM-flagged sign-in, indicating Gmail account takeover.
Detects anomalous OAuth application authorization behavior by a user, specifically monitoring for a spike in authorization events within a short timeframe. This activity is often indicative of consent phishing campaigns where an adversary tricks a user into granting excessive application permissions to a malicious OAuth app, or a compromised account performing bulk authorization grants.
This rule detects modifications to Google Workspace user account recovery methods, including the generation or deletion of 2SV (2-Step Verification) backup scratch codes, and changes to recovery email addresses or recovery phone numbers. These actions are often performed during account takeover attempts to establish persistence or facilitate bypassing MFA.
This rule detects the generation of 2-Step Verification (2SV) backup/scratch codes in Google Workspace. Backup codes allow a user to bypass standard MFA, making their generation a significant security event that may indicate an attacker is attempting to maintain persistent access to an account, often following a compromise or as a preparation for further malicious activity.
This rule detects modifications to administrative privileges in Google Workspace, including granting or revoking administrative roles and delegating administrative responsibilities. Such activities are critical security events that could indicate unauthorized privilege escalation, account compromise, or malicious administrative activity.
This rule detects potential data exfiltration by monitoring for anomalous user behavior across integrated SaaS applications. It flags accounts that perform high-frequency read, search, or view activities across three or more monitored SaaS platforms (Confluence, Jira, Slack, Google Workspace, Microsoft 365, or Bitbucket) within a 5-minute window, followed immediately by an upload or post activity to an external, non-integrated domain.
This rule detects potential data exfiltration by monitoring for anomalous user behavior across integrated SaaS applications. It flags accounts that perform high-frequency read, search, or view activities across three or more monitored SaaS platforms (Confluence, Jira, Slack, Google Workspace, Microsoft 365, or Bitbucket) within a 5-minute window, followed immediately by an upload or post activity to an external, non-integrated domain.
This rule detects the creation of email monitors or mail routing destinations within Google Workspace. These actions are indicative of persistent access methods where an attacker redirects or copies sensitive emails to an external or attacker-controlled account, enabling long-term intelligence gathering.
Detects authorization, token grants, or consent events for two specific Google Workspace application ClientIDs, which may be indicative of OAuth application consent abuse or malicious integration.
This rule detects new or anomalous Google Workspace OAuth authorization events by monitoring for actions related to OAuth, consent, tokens, or authorization from IP addresses, geographical locations, or devices that have not been observed for the specific user account within the past 30 days.
This rule detects potential phishing emails originating from the gasparinutrition.com domain. It identifies suspicious email delivery patterns involving the use of Google Workspace relay (gappssmtp.com) combined with DKIM misalignment and DMARC failures, indicating possible domain spoofing or unauthorized relay usage.
This rule monitors authentication events across various SaaS platforms (Jira, Okta, Azure AD, Google Workspace, Auth0, OneLogin) to detect suspicious activity. It calculates a risk score based on indicators such as impossible travel, high volume of distinct source IPs or geographic locations, and anomalous user agent activity, flagging sessions that exceed a defined risk threshold.
Detects incoming phishing emails sent from personal Gmail accounts that attempt to impersonate law firms by using legal-themed subjects (e.g., lawsuits, subpoenas, cease and desist). The rule specifically identifies the use of URL shorteners commonly used to obfuscate credential-harvesting destinations. The detection relies on email metadata and subject line patterns to identify potential spearphishing attempts.
Detects incoming emails containing suspicious legal-themed subjects (e.g., subpoenas, copyright infringement) from Gmail domains that include shortened URLs (e.g., bit.ly, goo.gl). The rule also checks for successful SPF or DKIM authentication results, which are common in mass phishing campaigns to bypass initial spam filters.
Detects spearphishing emails targeting high-value executive recipients (CEO, CFO, etc.) that contain PDF attachments and use subject lines related to settlement or distribution agreements. The rule specifically looks for inbound traffic routed through Google Workspace (gappssmtp.com) infrastructure, indicating potential use of compromised legitimate domains to distribute malicious lures.
Detects phishing emails associated with the TONResolver campaign that impersonate Booking.com guest complaints. The rule identifies suspicious emails containing .ics calendar file attachments or links to domains matching the pattern 'photo-[0-9]+.cfd', primarily targeting hospitality staff with subject lines related to hotel inquiries or issues.
Detects spearphishing emails delivered through Google Workspace infrastructure that fail DMARC strict alignment check. Specifically, this monitors instances where the DKIM signing domain is a gappssmtp.com subdomain that fails alignment with the envelope sender domain, while concurrently carrying a PDF attachment, consistent with known phishing campaign patterns.
This rule detects potential email spoofing or relay abuse by identifying emails that claim to be from the 'gasparinutrition.com' domain but fail DMARC authentication, despite showing a DKIM pass status specifically associated with 'gappssmtp.com' subdomains. This behavior is indicative of an adversary attempting to bypass email authentication mechanisms by leveraging legitimate third-party mail relay infrastructure to send spoofed messages.
Detects an account granting offline access, mail, files, directory, or user impersonation permissions shortly after anomalous authentication. This rule is designed to identify potential persistence mechanisms established by adversaries leveraging OAuth applications, as seen in campaigns like Tycoon 2FA AITM.
Detects the execution of known ransomware-related executables ('servertool.exe', 'encrypt.exe') when their command line arguments indicate interaction with cloud storage services such as OneDrive, SharePoint, GoogleDrive, Dropbox, or iCloud. This behavior is indicative of ransomware attempting to encrypt or exfiltrate data from cloud environments.
Detects a compromised account revoking refresh tokens, signing out other sessions, or replacing authentication state to retain exclusive access. This behavior is indicative of an attacker attempting to maintain exclusive control over a compromised account by invalidating other legitimate sessions or tokens.
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