Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects access to file sharing and exfiltration services reported in the Unit 42 Muddled Libra operational playbook, including S3 Browser and multiple upload services.
This rule detects activity associated with the RenEngine campaign, which utilizes HijackLoader to deliver Lumma Stealer and ACR Stealer. It identifies malicious activity through three main methods: 1) Endpoint detection of known MD5 hashes associated with the malware, 2) Network traffic (proxy/DNS/netflow) to distribution sites used by the campaign, and 3) Network traffic (proxy/DNS/netflow) to known Lumma Stealer C2 domains.
Detects downloads of the Huorong themed archive name reported in a ValleyRAT delivery chain.
This rule detects various indicators associated with the Booking.com phishing campaign targeting hotels and customers. It identifies suspicious web requests to non-Booking.com domains containing 'op_token' and 'complaint' or 'reservation' keywords, especially when combined with punycode, 'booklng' typos, or management-related subdomains. It also looks for partner kit patterns involving 'sign-in/?tpo_token=' and 'booklng' in URLs. Additionally, it identifies suspicious emails from newly generated Gmail accounts with specific subjects ('Automatic reply', 'Availability', 'Reservation') containing 'op_token' in the subject or body.
This rule detects potential exploitation attempts against Grandstream GXP1600 series IP phones related to 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 could indicate an attempt to trigger a buffer overflow or similar vulnerability.
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.
Detects access to Huorong typosquat and intermediary redirector domains reported by Malwarebytes as part of a ValleyRAT distribution campaign.
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 attempts to exploit CVE-2026-2329, a critical unauthenticated stack buffer overflow vulnerability in Grandstream GXP1600 series VoIP phones. The detection logic specifically looks for HTTP requests to the '/cgi-bin/api.values.get' endpoint, with a particular focus on the 'request' parameter within the query string. A request parameter with a length greater than or equal to 65 characters is indicative of a potential exploit attempt, as this length is likely to trigger the buffer overflow.
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)
Detects a high count of DNS queries from a single source IP to a specific query name, indicating potential C2 beaconing.
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.
Detects network traffic to local proxy on port 7152 associated with malicious NuGet package C2 behavior.
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