Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects Booking.com partner phishing lures described by Bridewell by identifying complaint/reserv URLs with op_token hosted on punycode or lookalike domains, plus the booklng sign-in tpo_token pattern.
This rule detects potential exploitation attempts against Grandstream GXP1600 series IP phones targeting CVE-2026-2329. It specifically looks for HTTP requests to the `/cgi-bin/api.values.get` endpoint where the `request` parameter in the URI query string has a length greater than or equal to 65 characters, which is indicative of an oversized request parameter often used in buffer overflow or similar vulnerabilities.
This rule detects activities associated with UNC6201 exploitation of Dell RecoverPoint VM, specifically looking for three distinct phases: Tomcat Manager WAR file deployment, modification of a persistence script on Linux, and communication with a GRIMBOLT C2 endpoint. The first part identifies WAR file deployments via Tomcat Manager. The second part looks for modifications to a specific persistence script file. The third part identifies network connections to a known GRIMBOLT C2 IP address or URL pattern.
This rule detects network connections or email URLs that match a list of known Indicators of Compromise (IOCs) associated with Signal-targeted phishing infrastructure and explicit phishing destination domains. These IOCs were identified in Unit 42's research on QR code attack vectors. The rule queries email URL information, URL click events, device network events, and common security logs (proxy/firewall/WAF) to identify activity related to these malicious domains.
This rule detects attempts to exploit CVE-2026-2329, a critical unauthenticated stack buffer overflow vulnerability in Grandstream GXP1600 VoIP phones. The detection is based on requests to the '/cgi-bin/api.values.get' URI path, which is associated with the vulnerability.
This rule detects various indicators associated with the SSHStalker botnet on Linux systems, including outbound IRC-like network connections, modifications to cron files for persistence, log tampering (specifically utmp/wtmp/lastlog files), and the execution of compilers from suspicious directories like /tmp or /dev/shm. Each section of the rule targets a specific behavior of the botnet.
This rule detects HTTP requests targeting the '/cgi-bin/api.values.get' endpoint with a 'request' parameter, which is indicative of exploitation attempts for CVE-2026-2329 in Grandstream GXP1600 series IP phones. This vulnerability allows for information disclosure.
This rule detects the presence of hardcoded tokens associated with the dYdX supply chain attack. These tokens were used for C2 authentication and as an API key for data exfiltration. The rule searches across process command lines, network URLs, network headers, and common security logs for these specific tokens.
Detects likely exploitation attempts for CVE-2026-2329 by matching requests to /cgi-bin/api.values.get where the first identifier in the request= parameter exceeds the 64-byte stack buffer described by Rapid7.
This rule detects network connections or DNS queries to a list of domains identified as phishing campaign infrastructure. These domains are associated with a 'Signal Phishing Campaign' and are likely used for malicious purposes such as credential harvesting or malware distribution. The rule checks for these domains in `RemoteUrl` or `DestinationHost` fields across various network-related logs.
This rule detects attempts to exploit CVE-2026-2329, a critical unauthenticated stack buffer overflow vulnerability in Grandstream GXP1600 VoIP phones. The detection logic looks for HTTP requests to the vulnerable endpoint '/cgi-bin/api.values.get' and specifically for an oversized 'request' parameter where the first identifier before a colon is 65 characters or longer, indicating a likely buffer overflow attempt.
Detects abuse of uncommon DNS record types for tunneling (CNAME, MX, NULL)
This rule detects network connections to malicious infrastructure associated with a supply chain attack targeting dYdX npm and PyPI packages. The infrastructure is used for credential exfiltration and as a C2 for a RAT.
Detects DNS queries to known OAST (Out-of-Band Application Security Testing) domains like oastify.com, oast.pro, and oast.fun where the subdomain is unusually long (over 50 characters). Long subdomains may indicate encoded data exfiltration, a technique observed in the exploitation of vulnerabilities like CVE-2026-1731 to bypass egress filtering.
This detection identifies network connections from non-browser processes to known Large Language Model (LLM) API endpoints. While some connections may be legitimate developer or application traffic, unexpected processes connecting to these services could indicate unauthorized data exfiltration, corporate espionage, or misuse of AI services.
Detects HTTP requests to vulnerable Ivanti EPMM endpoints containing URI patterns associated with active exploitation of CVE-2026-1281 and CVE-2026-1340. The rule looks for specific URI paths and the presence of a 'gPath' parameter, which is indicative of an exploitation attempt.
Detects outgoing network connections using the User-Agent 'ArkanixStealer/1.0', which is hardcoded in the C++ variant of the Arkanix Stealer.
This rule set detects attempts to download an 'install.sh' script from the domains 'clawd.bot' or 'openclaw.ai' using various methods. The first rule, 'openclaw_curl_install_script', specifically targets command-line tools like curl, wget, aria2c, and fetch. The 'openclaw_powershell_download' rule focuses on PowerShell commands (Invoke-WebRequest, iwr, Invoke-RestMethod, irm) used for downloading. The 'openclaw_aria2c_fetch_download' rule is redundant with the first rule, as it also targets aria2c and fetch. The 'openclaw_lolbin_download' rule identifies the use of Living Off The Land Binaries (LOLBins) such as certutil, bitsadmin, and mshta for the same download activity. Finally, the 'openclaw_http_install_sh' rule detects direct HTTP network requests to the 'install.sh' path on these domains. Collectively, these rules aim to identify potential initial access or execution attempts involving a suspicious installation script from specific domains.
Detects a potential attempt to downgrade a password manager client's encryption to a legacy, non-authenticated mode (e.g., AES-CBC). A malicious or compromised server can send a specially crafted response during login or synchronization that forces the client to use weaker cryptography. This can compromise the integrity and confidentiality of the user's vault, enabling further attacks like vault modification or padding oracles.
Detects a sequence of HTTP requests where the User-Agent shifts from 'WordPressAgent' to 'FingerPrint' within a short time window, a behavior associated with OysterLoader C2 registration and payload retrieval.
Detects potential exploitation of Apache bRPC command injection vulnerability (CVE-2025-60021) via the /pprof/heap endpoint.
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