Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Identify network traffic based on target country
Provides example usage of WHOIS data, detecting a DNS query for a domain that contains a specific string and is not registered with the defined domain registrar.
Detects potential Command and Control (C2) communication activity associated with the Peach Sandstorm APT group. The rule specifically looks for HTTP GET requests to '/api/Core/Command/Init' or '/api/Core/Command/Restart' endpoints, which are indicators of this group's C2 infrastructure.
Detects suspicious DNS queries to known Monero mining pools, indicating potential cryptocurrency mining activity on the network. This rule identifies specific domain names associated with various Monero mining operations.
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP. This activity can indicate an attacker exploiting a public-facing application to gain initial access and execute arbitrary commands on the F5 BIG-IP device.
Detects potential exploitation of CVE-2023-46214, a remote code execution (RCE) vulnerability in Splunk Enterprise. The rule looks for specific HTTP POST requests containing 'NO_BINARY_CHECK=1' and 'input.path' in the URI query, ending with '.xsl', and resulting in a 200 or 302 HTTP status code. These patterns are indicative of an attempt to leverage the insecure XML parsing vulnerability.
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP
This rule detects exploitation indicators for CVE-2023-20198, a privilege escalation vulnerability in Cisco IOS XE Software Web UI. It looks for specific log messages related to Web UI installation operations, system configuration changes, or successful web logins, in conjunction with the use of specific user accounts ('cisco_tac_admin', 'cisco_support', 'cisco_sys_manager') that are not typically created by default or used by Cisco representatives. The combination of these events suggests an attempt to exploit the vulnerability.
Detects exploitation attempts of CVE-2023-43261, an information disclosure vulnerability in Milesight UR5X, UR32L, UR32, UR35, UR41 routers before v35.3.0.7. Attackers can access sensitive router components, specifically the 'httpd.log' file, through proxy logs. This rule looks for GET requests to the '/lang/log/httpd.log' path with a successful HTTP status code (200).
Detects exploitation attempts of CVE-2023-43261, an information disclosure vulnerability in Milesight UR5X, UR32L, UR32, UR35, UR41 routers before v35.3.0.7. This vulnerability allows attackers to access sensitive router components by requesting the '/lang/log/httpd.log' file, which can contain passwords and other critical information.
Detects suspicious user agent strings commonly used by various malware families and Remote Access Trojans (RATs) in proxy logs. This rule identifies specific user-agent patterns associated with known threats like DragonOK, PlugX, HTTPBrowser RAT, njRAT, ZeroAccess, Dyre, Upatre, Ghost419, W32/Renos.Downloader, Kazy, Sality, Fareit, Toby web shell, Loki Bot, Pony, MacControl malware, Zebrocy, Ursnif, Emotet, Lockbit, Quasar RAT, Havana, AntSword, Racoon Stealer, AresLoader, Lilith Stealer, SVC Loader, WSHRAT, Zerobot, Nymaim, DarkCloud, BunnyStealer, SparkRAT, B4B3RAT, and Latrodectus loader.
Detects Kerberos Ticket-Granting Service (TGS) requests that utilize RC4 encryption. This is often indicative of Kerberoasting attacks, where adversaries request service tickets for Service Principal Names (SPNs) and then attempt to crack the RC4-encrypted hash offline to obtain plaintext credentials. The rule specifically excludes requests from computer accounts (service accounts ending with '$') to reduce false positives.
This rule detects suspicious user agent strings commonly used by various hacking tools, including vulnerability scanners, brute-force tools, and SQL injection tools, within proxy logs. The rule identifies specific strings indicative of tools like Arachni, Hydra, DirBuster, SQLMap, and others, which are often employed during reconnaissance, initial access, and credential access phases of an attack.
Detects exploitation attempts on Cisco ASA FTD systems exploiting CVE-2020-3452. The rule specifically looks for HTTP requests containing URI query strings indicative of the vulnerability, combined with a successful HTTP status code (200), suggesting a successful exploitation or at least a successful attempt to trigger the vulnerable endpoint.
This rule detects suspicious DNS queries that are characteristic of Cobalt Strike beacons. Specifically, it looks for DNS queries starting with 'aaa.stage.' or 'post.1', or containing '.stage.123456.'. These patterns are known indicators of Cobalt Strike's DNS command and control (C2) communication.
Detects suspicious and malformed user agent strings in proxy logs that may indicate malicious activity, including the use of specific malware or tools like Cobalt Strike, APT28 malware, Racoon Stealer, and Erbium stealer. The rule identifies various anomalies such as incorrect formatting, typos, and specific user agent strings known to be associated with adversary tools.
This rule detects suspicious DNS queries where the Z flag bit in the DNS protocol header is set to a non-zero value. The Z flag is reserved (unused) per IETF design, though it has recently been used in DNSSec. A non-zero Z flag value should be rare outside of legitimate DNSSec usage. The rule includes exclusions for common TLDs, query types (NS, MX), responses, and NetBIOS related traffic to reduce false positives. The rule's intent is to identify potential command and control (C2) or data exfiltration attempts leveraging DNS anomalies.
This rule detects suspicious user agent strings commonly associated with various Advanced Persistent Threat (APT) groups and malware families. It specifically targets patterns found in proxy logs, indicating potential command and control (C2) communications or other malicious web activity. The rule includes a broad list of user agent strings linked to specific APTs like Backspace, GrizzlySteppe, Comment Crew, Naikon, Sofacy (Xtunnel, Zebrocy), Derusbi, Winnti, APT17, Bronze Butler (Daserf), TSCookie, Delphi downloader, VPNFilter, FELIXROOT, RMS, Cmstar, KerrDown, APT33 (PowerTon), Hidden Cobra, Strong Pity, Mustang Panda, BackdoorDiplomacy, SideWalk, LitePower (WRITE), ZINC, PlugX, and RedCurl.
Detects DNS TXT records containing strings commonly used for command execution, such as 'IEX' (Invoke-Expression), 'Invoke-Expression', and 'cmd.exe'. This technique can be used by adversaries for command and control (C2) or data exfiltration by embedding commands within DNS responses.
This rule detects the usage of cleartext protocols over a network by monitoring firewall logs for allowed connections to specific destination ports commonly associated with unencrypted services. These ports include HTTP (80, 8080), FTP (21), Telnet (23), and various database or application-specific ports (e.g., 1433, 3306, 1521, 27017, 50000, 11211, 15672, 5900-5904). The rule specifically looks for 'forward' or 'accept' actions, or connections not marked as 'blocked', indicating active cleartext communication. The primary goal is to identify potential credential exposure or sensitive data transmission over insecure channels.
Detects exploitation attempts targeting the VMware vCenter Server using the file upload vulnerability CVE-2021-22005. The rule specifically looks for POST requests to the '/analytics/telemetry/ph/api/hyper/send?' URI, which is indicative of an attempt to leverage this vulnerability for file upload.
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