Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects a sequence of events on Linux hosts involving a remote interactive or network logon from an external IP, followed within 5 minutes by root-level process execution, and subsequently within 2 hours by an outbound SSH connection to a private or known attacker IP. Also includes a separate branch for direct logons from known malicious IPs.
Detects AWS OIDC role assumption by a GitHub workflow running on a ci-sync-<6 chars> branch followed within an hour by Secrets Manager reads using the same session credentials, as seen in the Gheist campaign.
This rule aggregates software inventory, vulnerability assessments, network connection events, and exposure graph data to prioritize patching and identify internet-facing devices running PHP with known vulnerabilities or active web listeners.
This analytic detects multipart POST traffic with a serialized PHP structure in an uploaded filename, which may indicate an attempt to exploit PHP session upload-progress handling and can be associated with PHP2Shell activity.
Suricata EVE's standard HTTP events do not expose multipart form field names, so this Suricata variant cannot confirm the PHP_SESSION_UPLOAD_PROGRESS field without additional request-body inspection.
Suricata EVE's standard HTTP events do not expose multipart form field names, so this Suricata variant cannot confirm the PHP_SESSION_UPLOAD_PROGRESS field without additional request-body inspection.
Hunting query for the ConnectWise Cloud Backup (SkyKick) application credential abuse reported in October 2026. It returns three signals, sorted by a Priority column. First, sign-ins by the seven ConnectWise and SkyKick application IDs from a public IP address. ConnectWise states the Cloud Backup app normally signs in from Azure private IPv6 addresses. Second, service principals that sign in from a public IP address in a country not seen in their 14-day baseline. This signal evaluates apps with at least 20 prior sign-ins. Third, Entra audit events initiated by applications. These include an application adding itself or another non-user identity to a directory role, an application adding or changing credentials for the first time in the baseline window and any credential change by an application named ConnectWise or SkyKick. Role additions with an unidentified target appear with Review priority. Audit events initiated by applications carry no source IP, so the IP indicator applies to the sign-in signals only. Routine credential changes by Azure services can still appear with Review priority. The query follows the Microsoft Defender advanced hunting schemas and runs without errors in Advanced Hunting. The audit signal was exercised against live Entra audit events in a Microsoft 365 tenant. Indicator columns are short-lived and used for enrichment only.
Detects instances where web server processes or PHP interpreters (apache2, httpd, php-fpm, php) spawn a shell process (sh, bash, dash). This behavior is often indicative of post-exploitation activity such as remote code execution (RCE) via PHP session upload progress or web shell activity.
Detects a potential multi-stage social engineering attack where a user first receives a high volume of emails (mail-bomb burst) within a short window, followed shortly by an external Microsoft Teams message from a suspicious throwaway tenant using an IT help desk display name.
Detects an inbound public network or remote interactive logon to a device, followed within 24 hours by credential-dumping activity, and subsequently within 7 days by email data staging (creation or modification of PST, OST, EML, or MBOX files) on the same device.
Detects instances where the Apache web server spawns a shell process (sh, dash, bash) which subsequently executes common discovery or callback utilities (such as id, curl, wget, php, hostname, or uname), typically indicative of web application exploitation or remote code execution.
Detects node.exe or npm spawning command shells or Living-off-the-Land Binaries (LOLBins) as part of npm preinstall or postinstall lifecycle scripts.
Detects potential SQL injection probing followed by a successful authentication response (HTTP 302) from the same external client IP within a short timeframe on IIS web servers.
Correlates a CVE-2026-76504 encoded /%6a_security_check login POST with a follow-on /dataservice/admin/user request from the same client to the same vManage within 10 minutes. Summarized and sorted by follow-on count.
Detects web server processes (apache2, httpd) spawning a Unix shell (sh, dash, bash) which subsequently executes curl, wget, or php to perform an external HTTP fetch or download. This behavior is commonly associated with PHP or web application post-exploitation callbacks (webshells).
Hunting query for the ConnectWise Cloud Backup (SkyKick) application credential abuse reported in October 2026. It returns three signals, sorted by a Priority column. First, sign-ins by the seven ConnectWise and SkyKick application IDs from a public IP address. ConnectWise states the Cloud Backup app normally signs in from Azure private IPv6 addresses. Second, service principals that sign in from a public IP address in a country not seen in their 14-day baseline. This signal evaluates apps with at least 20 prior sign-ins. Third, Entra audit events initiated by applications. These include an application adding itself or another non-user identity to a directory role, an application adding or changing credentials for the first time in the baseline window and any credential change by an application named ConnectWise or SkyKick. Role additions with an unidentified target appear with Review priority. Audit events initiated by applications carry no source IP, so the IP indicator applies to the sign-in signals only. Routine credential changes by Azure services can still appear with Review priority. The query follows the Microsoft Defender advanced hunting schemas and runs without errors in Advanced Hunting. The audit signal was exercised against live Entra audit events in a Microsoft 365 tenant. Indicator columns are short-lived and used for enrichment only.
Detects command execution patterns on NetScaler appliances involving the extraction of system details (id, uname, hostname, nsrelease) and writing or echoing them into HTML files within NetScaler web directories, indicative of web shell installation or staging.
Detects administrative access to the DLP console from an unfamiliar address. Console
access permits policy change, violation review and exception approval — everything
needed to make data loss invisible, in one place.
Onboarding: TRELLIX-DLP is ingested via Syslog (XML) (Bloo extractor 805).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=authentication where sourcename='TRELLIX-DLP' and action='LOGIN'
| groupby user, srcip, authproto
access permits policy change, violation review and exception approval — everything
needed to make data loss invisible, in one place.
Onboarding: TRELLIX-DLP is ingested via Syslog (XML) (Bloo extractor 805).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=authentication where sourcename='TRELLIX-DLP' and action='LOGIN'
| groupby user, srcip, authproto
Detects Microsoft Entra ID sign-ins to specific third-party applications related to Updraft (TeamUpdraft, UpdraftCentral, UpdraftVault, UpdraftClone, UpdraftPlus) with anomalous characteristics such as multi-IP access, distinct countries, or failed-then-successful access attempts, indicating possible credential compromise or misuse.
Detects a successful device code flow sign-in followed within one hour by a successful sign-in from the same user using a different IP address and country. This pattern can indicate device code phishing or abuse of the OAuth 2.0 device authorization grant flow.
Detects successful administrative login events originating from IP addresses outside of configured trusted management networks on Fortinet devices.
Detects the execution of the public Horizon3.ai PoC exploit for CVE-2026-106173 (FortiSIEM gRPC path traversal RCE) utilizing python interpreters with specific command-line arguments indicative of the exploit tool.
Detects web server processes (Apache httpd, apache2, php-cgi, php-fpm) spawning a Unix shell (sh, bash, dash) that executes a wget or curl command piped directly into the shell for execution, indicative of potential remote code execution or web shell activity.
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