Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
3,324 detections
Filters
Last updated
All Time
Detection languages
1,225
935
481
239
184
Contributors
626
512
469
337
261
Categories
20,437
11,828
5,871
5,150
4,864
3,324
Platforms
1,411
1,220
873
142
138
Products / Services
973
444
393
392
360
MITRE Techniques
1,525
1,085
885
593
540
CVEs
42
28
26
26
24
IDS Classtypes
390
220
127
40
26
IDS Protocols
671
150
30
18
12
This rule monitors NetScaler ADC logs for indicators associated with the PitScaler campaign, specifically targeting exploitation of CVE-2026-88771 and CVE-2026-88772. It detects exploitation artifacts (DTLS handshake errors, NSPPE crashes), deployment of WHIPSHOT/SLAPSHOT malware, web shell installation, httpd.conf configuration tampering, persistence mechanisms involving privilege escalation (chmod), and connections to known malicious infrastructure.
Detects high-frequency, short-duration UDP flow activity on NetScaler VPN ports (443/4433) indicative of volumetric or malformed DTLS handshake probing, potentially associated with exploitation attempts like CVE-2026-88772.
Detects signs of exploitation targeting a PAN-OS GlobalProtect authentication bypass vulnerability (CVE-2026-0257). The rule identifies an initial network request with invalid or malformed session cookies aimed at GlobalProtect endpoints, followed immediately by unauthorized access attempts to administrative portal interfaces from the same source IP address.
Detects an attempt to exploit CVE-2026-88772 by identifying an oversized DTLS handshake record on a NetScaler Gateway. The rule looks for UDP traffic on port 443 where the initial handshake record exceeds the expected size threshold, indicative of a potential buffer overflow attempt.
This rule detects indicators of the PitScaler campaign targeting Citrix NetScaler ADC and Gateway appliances, exploiting vulnerabilities (CVE-2026-88771, CVE-2026-88772). It identifies the full attack chain including initial DTLS heap corruption exploitation, WHIPSHOT web shell C2 patterns, SLAPSHOT tunneling artifacts, web shell deployment files, httpd.conf PHP configuration tampering for persistence, privilege escalation via setuid /bin/sh modification, and anti-forensic log tampering.
Detects potential exploitation attempts targeting unpatched Citrix NetScaler ADC or Gateway devices, specifically looking for unauthenticated requests to management or sensitive endpoints that contain command execution indicators. This rule is designed to identify activity associated with vulnerabilities similar to CVE-2026-88771.
Detects attempts to bypass authentication on Citrix NetScaler Gateway or management interfaces by using alternate URI paths, double-encoding, or path traversal techniques to reach restricted administrative endpoints. This is consistent with exploitation attempts targeting vulnerabilities like CVE-2026-19490.
Detects potential scanning and exploitation attempts against Oracle PeopleSoft Environment Management Hub (PSEMHUB) endpoints, specifically targeting CVE-2026-35273. The rule monitors Azure Application Gateway logs for suspicious HTTP methods (PUT, DELETE, OPTIONS, TRACE) or parameters (e.g., directory traversal strings, command injection indicators) combined with high-frequency sequential probing patterns.
Detects an SSL_HANDSHAKE_FAILURE syslog event on a Citrix NetScaler appliance characterized by a DTLSv1.0 client version and a 'Handshake failure-Internal Error' reason. This pattern is indicative of exploitation attempts against CVE-2026-88772, specifically associated with the WHIPSHOT/SLAPSHOT campaign. This is a high-sensitivity precursor signal that should be correlated with system crash events on the appliance for increased confidence.
Detects an exploitation attempt against PoeLLM or LiteLLM MCP test/connection endpoint using a python3 stdio payload that fetches data from port 81.
Detects network exploitation attempts targeting Fortinet FortiOS and FortiProxy vulnerabilities (CVE-2024-55591, CVE-2025-24472) involving authentication bypass via HTTP header manipulation (Forwarded, X-Forwarded-For) and unauthorized access to the /jsconsole endpoint.
This rule detects HTTP requests containing both Content-Length and Transfer-Encoding headers, which is a technique used in HTTP Request Smuggling attacks. This specific signature targets attempts to exploit CVE-2026-88773 in Citrix NetScaler.
Detects exploitation attempts against Microsoft SharePoint leveraging the ToolShell exploit chain, as well as subsequent post-exploitation webshell activity involving anomalous 'layoutNsp.aspx' naming conventions. This covers initial exploitation of vulnerabilities such as CVE-2025-49704 and associated variants, followed by the deployment of webshells associated with the ToolShell campaign.
Detects exploitation attempts against Microsoft SharePoint leveraging the ToolShell exploit chain, as well as subsequent post-exploitation webshell activity involving anomalous 'layoutNsp.aspx' naming conventions. This covers initial exploitation of vulnerabilities such as CVE-2025-49704 and associated variants, followed by the deployment of webshells associated with the ToolShell campaign.
Detects a multi-stage compromise sequence involving anomalous authentication followed by VPN session establishment and a burst of outbound connections from Citrix ADC/Gateway appliances. Tightened to reduce false positives from legitimate admin access, routine VPN sessions, and authorized appliance telemetry/updates.
This rule detects potential post-exploitation activity on a NetScaler appliance where a crontab modification occurs within a short window (1 hour) following suspicious syslog entries indicative of oversized-parameter buffer overflow exploitation attempts (CVE-2026-88771/CVE-2026-88772).
Detects potential exploitation attempts targeting the vulnerable Oracle PeopleSoft PSEMHUB Environment Management Hub endpoint (associated with CVE-2026-35273 and UNC6240). The rule identifies suspicious bursts of POST requests where the URI path uses percent-encoding or mixed-case characters to evade Web Application Firewall (WAF) filtering.
Detects potential exploitation attempts against CVE-2026-76504, an authentication bypass vulnerability in Cisco Catalyst SD-WAN Manager. The rule monitors web server logs for requests to 'j_security_check' that include URL-encoded characters (specifically %6a, representing 'j'), which is a known pattern used to bypass security filters.
This rule detects potentially malformed or truncated DTLS records on NetScaler appliances, specifically on port 443. The rule looks for packets with a specific record length configuration that may indicate a buffer overflow or other exploitation attempt targeting CVE-2026-88772. The detection logic relies on analyzing the DTLS handshake sequence and packet sizing, and the rule authors recommend correlating these events with SSL_HANDSHAKE_FAILURE (DTLSv1.0, Handshake failure-Internal Error) and appliance crash log entries to confirm potential exploitation.
This rule detects potential command injection attacks targeting the Zimbra 'swatchdog' service, specifically involving the abuse of SNMP trap notifications (CVE-2026-73570). The attack works by injecting malicious shell metacharacters into the 'zimbra-MIB::zmServiceName' argument, which is processed by a Perl-invoked 'swatchdog' script. The rule monitors process execution events for shell commands spawned by the swatchdog utility that contain suspicious shell operators and the targeted MIB parameter.
Detects a multi-stage compromise sequence involving anomalous authentication followed by VPN session establishment and a burst of outbound connections from Citrix ADC/Gateway appliances. Tightened to reduce false positives from legitimate admin access, routine VPN sessions, and authorized appliance telemetry/updates.
Page 5 of 159