Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the sequential activation of Android Accessibility services followed by Device Administrator activation by the same application within a short timeframe. This behavior is indicative of sophisticated Android malware, such as RatHat, establishing persistence and preventing uninstallation by combining Accessibility-based control with Device Admin-based device management capabilities (e.g., remote wipe or anti-uninstall).
Detects reconnaissance and persistence behaviors associated with the Akira ransomware attack chain, specifically the execution of the Cloudflare Tunnel daemon for remote access or the creation/modification of local user accounts via standard Windows tools.
This rule detects potentially malicious search activity in Microsoft SharePoint by monitoring for high-frequency queries that include specific site class patterns ('STS_Site' or 'STS_Web') and a document ID range search pattern ('indexdocid'). This behavior is characteristic of an adversary attempting to enumerate or scrape documents within a SharePoint environment.
Detects activity from known Storm-3168 (JADEPUFFER) campaign IP addresses across Azure control-plane, sign-in, and App Service logs. The rule monitors for malicious indicators in Azure Activity logs, Azure Sign-in logs, and Service Principal sign-ins, as well as specific sensitive URI paths (e.g., shells, admin login paths) within App Service HTTP logs.
Detects evidence of account persistence and potential mailbox manipulation following an anomalous sign-in event in Google Workspace. The rule identifies suspicious post-compromise activity such as the addition of new MFA methods, new OAuth application grants, or mailbox forwarding/inbox rules, which are consistent with the reuse of captured authenticated sessions.
Detects instances where a privileged account (such as an administrator or helpdesk user) removes MFA security information or resets a password for a target account, followed shortly (within 4 hours) by a sign-in attempt from that same target account exhibiting risk characteristics such as impossible travel or unfamiliar features. This pattern is often associated with social engineering attacks, such as those attributed to Scattered Spider, where an attacker coerces support staff to disable MFA protections for an account.
Detects a sequence of events where a user with a high-risk or compromised sign-in status registers a new device in Entra ID shortly after the event, followed by subsequent sign-ins from that device that bypass multi-factor authentication (MFA) via Conditional Access policies.
Detects high-privilege user accounts (e.g., executives, administrators) undergoing a credential or MFA reset, followed by an atypical sign-in event within a two-hour window. This pattern is indicative of potential account takeover or identity-compromise scenarios, often associated with help-desk vishing attacks where an attacker induces a user or administrator to reset credentials or MFA methods.
Detects MFA or credential reset activities on high-value or privileged accounts that lack a corresponding out-of-band verification signal, such as manager approval or identity proofing, within a one-hour window. This behavior is indicative of social engineering attempts where attackers manipulate help-desk procedures to bypass identity protections.
Detects the addition or modification of federated identity credentials within Microsoft Entra ID (Azure AD). Adversaries may add these credentials to service principals or applications to achieve persistent access and potentially bypass traditional password-based authentication mechanisms.
Detects modifications to Microsoft Exchange mailbox folder permissions where the 'Default' user is granted 'Owner' access. This activity, which may involve operations such as 'UpdateFolder', 'Add-MailboxFolderPermission', or 'Set-MailboxFolderPermission', is a known server-side persistence mechanism. By granting 'Owner' rights to the 'Default' user, an attacker can bypass standard authentication and device-level controls to access mailbox contents, often following initial exploitation such as OWA XSS.
Detects post-exploitation indicators of CVE-2026-62911, an authentication-bypass-by-capture-replay vulnerability in Microsoft Exchange. The rule identifies anomalous behavior following a potential bypass: either the assignment of the ApplicationImpersonation management role or a single impersonation session accessing an abnormally high number of distinct mailboxes (FolderBind, MessageBind, or SendAs).
Detects unauthorized or suspicious configuration changes on Cisco IOS XR devices, specifically targeting the creation of SPAN/mirroring sessions, ACL modifications to bypass traffic filtering, and changes to AAA or local user authentication settings. These patterns are consistent with post-compromise activities by adversaries seeking persistence and traffic interception.
Detects tenant-level enablement of Microsoft Teams external/federated access or addition of an unfamiliar external domain shortly before a spike in inbound Teams calls to helpdesk/IT-support-tagged users — models CrowdStrike's 2026 Financial Services Threat Landscape Report on 'Mutant Spider,' the most active threat to financial services, whose primary technique is voice phishing over Microsoft Teams impersonating internal IT.
Detects the creation of an administrative-level user account (e.g., 'ops') on a MikroTik RouterOS device shortly after an anomalous login attempt using the '-2' username. This sequence is indicative of the exploit chain associated with specific MikroTik RouterOS vulnerabilities where an unauthenticated or specially crafted login is used to facilitate unauthorized user creation.
Detects the presence of an unauthorized administrative account (e.g., 'ops') on MikroTik RouterOS devices following a system 'Flagged' indicator. This rule correlates administrative account creation or modification events with system-reported compromise indicators to identify post-exploitation persistence mechanisms related to known RouterOS vulnerabilities.
This rule detects scenarios where a user account modifies Conditional Access (CA) policies (specifically targeting user or group inclusion/exclusion settings) within one hour of that same user account modifying authentication method policies. This pattern is potentially indicative of an adversary weakening security controls by adjusting authentication requirements and subsequently tampering with CA policies to maintain persistence or bypass MFA.
Detects rapid, automated-style creation of an application, associated service principal, and delegated permission grants within a 60-second window. This behavior is indicative of the TrustSink technique or similar automated adversary infrastructure setup in Microsoft Entra ID (formerly Azure AD), where an attacker establishes persistence or elevated access through newly created apps.
Detects the creation of suspicious O365 inbox rules designed to hide (via mark-as-read, move, or delete actions) or forward/redirect email messages containing keywords associated with financial transactions such as payment, wire, or invoice. This behavior is indicative of post-compromise activity, specifically targeted at invoice fraud or email thread hijacking.
Detects evidence of account persistence and potential mailbox manipulation following an anomalous sign-in event in Google Workspace. The rule identifies suspicious post-compromise activity such as the addition of new MFA methods, new OAuth application grants, or mailbox forwarding/inbox rules, which are consistent with the reuse of captured authenticated sessions.
Remote Scheduled Task Creation via RPC
Cortex XDR
This rule detects the creation of scheduled tasks on a remote host via the Task Scheduler RPC interface (opnum 1, RegisterTask). This interface is commonly abused by lateral movement tools such as Impacket's atexec, SharpTask, and SynkLoader to execute code or establish persistence on a remote system.
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