Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
696 detections
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Detects executable files with names containing PDF-related keywords (e.g., 'pdf', 'convert', 'editor') being dropped in the Downloads folder by a web browser process. This behavior is typical of users downloading potentially unwanted or malicious PDF converters, often delivered via SEO poisoning or malvertising campaigns.
This rule identifies the use of specific malicious code signing certificates by matching their SHA1 thumbprints against a predefined list. These certificates are known to be associated with various threat actors or malicious software, indicating potential supply chain compromise or the use of signed malware.
Detects known malicious file hashes associated with the VoidLink malware framework.
Detects MuddyWater Rust-based implants containing unstripped build artifacts, specifically the username 'Jacob' and other development environment paths.
Detects indicators of React2shell exploitation originating from 'node' or 'next' processes on web-facing or internet-facing assets. This rule identifies suspicious network connections to common web ports (3000, 8080, 443, 80) or process executions containing command-line arguments indicative of prototype pollution exploitation (e.g., '__proto__', 'constructor:constructor', 'process.mainModule.require', 'execSync', 'vm.runInThisContext', 'fs.readFileSync') or common post-exploitation commands ('whoami', '/etc/passwd', 'id', 'env', 'hostname').
Detects DNS queries to domains using common AWS typosquatting patterns such as 'awscloud', 'compute-aws', or billing/security lures.
This rule detects the execution of known proxyware applications such as Infatica, Honeygain, and IPRoyal by looking for specific command-line arguments. Proxyware applications monetize unused internet bandwidth by routing traffic through the user's device, which can pose security and privacy risks.
Detects network traffic to domains associated with the TAG-160 cluster's phishing campaigns, which primarily target the logistics sector.
This rule detects the download of Android Application Package (APK) files from Amazon S3 buckets, where the HTTP URI contains keywords related to gambling (slot, bet, play, jackpot). This activity is indicative of potential malware distribution, specifically targeting Android devices with gambling-themed applications, as observed in Indonesian gambling ecosystems.
Detects network connections to dedicated IP addresses previously used to host Evilginx phishing proxies. While the threat actor has reportedly shifted to using Cloudflare, these IPs represent past infrastructure and should be monitored for potential reuse.
Detects program executions in suspicious non-program folders related to malware or hacking activity
Detects when multiple distinct domains, where at least one is known malicious, share the same HTTP body SHA1 hash or favicon MD5 hash. This pattern is indicative of threat actor infrastructure reuse and templating, as described in analysis of campaigns like LaundryBear and FreeDrain.
SQL Database Version Discovery
Suricata
This rule detects attempts to discover the version of a SQL database, often a precursor to SQL injection attacks or other reconnaissance activities. It specifically looks for SQL queries containing keywords like 'select' and 'version' in various common formats used to retrieve database version information.
Detects the execution of a Sysinternals Tool via the creation of the "accepteula" registry key
Detects the execution of some potentially unwanted tools such as PsExec, Procdump, etc. (part of the Sysinternals suite) via the creation of the "accepteula" registry key.
ET MALWARE Observed Malicious Domain (tamku .shoplerter .opnetorologies .net in TLS SNI)
This rule detects attempts by an unauthorized user to trigger a full data export from Bitbucket. This activity could indicate an adversary attempting to collect sensitive information, such as source code or credentials, from the code repository.
This rule detects when an end-user within an Okta environment reports suspicious activity associated with their account. This event indicates that a user has actively flagged an action or login as potentially unauthorized or malicious, prompting further investigation.
Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal.
_ldap._tcp.dc._msdcs.ad.domain.com is a DNS query used by AD clients to locate Domain Controllers that can provide LDAP services for the ad.domain.com domain, ensuring users and computers can authenticate, query directory data, and function inside the AD forest.
This SPL query flags IP addresses returned by DNS for the AD DC-locator SRV query (_ldap._tcp.dc._msdcs.ad.domain.com.) that are not known/approved Domain Controllers in your inventory, and that show up frequently (more than 10 hits in the selected time range).
This can be for the use case where an attacker has compromised or poisoned a DNS server / resolver and is advertising their IP(s) as Domain Controllers (SRV/A glue in _msdcs) so clients attempt LDAP/Kerberos against attacker-controlled hosts.
This SPL query flags IP addresses returned by DNS for the AD DC-locator SRV query (_ldap._tcp.dc._msdcs.ad.domain.com.) that are not known/approved Domain Controllers in your inventory, and that show up frequently (more than 10 hits in the selected time range).
This can be for the use case where an attacker has compromised or poisoned a DNS server / resolver and is advertising their IP(s) as Domain Controllers (SRV/A glue in _msdcs) so clients attempt LDAP/Kerberos against attacker-controlled hosts.
This rule detects the creation of temporary files within the WebDAV TfsStore directory that have suspicious file extensions. Attackers can leverage WebDAV to force authentication or to drop malicious files onto a system. The presence of executable or archive file extensions in this specific temporary directory is highly indicative of malicious activity, potentially related to initial access or resource development.
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