Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the installation of a Microsoft Edge extension followed by an outbound network connection to known StegoAd C2 infrastructure after a 3-5 day dormancy period, a behavior characteristic of time-gated sandbox evasion.
Detects unusual SSH activity originating from or involving Cisco vManage systems, specifically monitoring outbound SSH connections to internal network segments (10.0.0.0/8) or the execution of SSH processes with command-line arguments indicative of management tasks (vsmart, vbond).
Detects network connections to the typosquatted domain 'perplexity-ai.online', associated with a malicious browser extension used for data exfiltration. Additionally, it detects the creation or modification of 'background.js' files within common web browser extension directories, which is a common persistence mechanism for malicious extensions.
This rule detects installation artifacts, configuration file modifications, registry changes, and network activity associated with a specific malicious Chromium extension ('flkebkiofojicogddingbdmcmkpbplcd') that hijacks the default browser search provider via declarativeNetRequest rules and communicates with a typosquatted domain 'perplexity-ai.online'.
Detects potentially unauthorized or malicious behavior associated with the RustDesk remote access tool. The rule monitors for unsigned screen capture attempts, spawning of shell or scripting processes, cross-process input injection, and network communication over non-standard or unexpected ports.
Detects artifacts and behaviors associated with a malicious Chromium extension identified as 'Search for perplexity ai' (extension ID: flkebkiofojicogddingbdmcmkpbplcd). The rule monitors for unauthorized extension installation, registry modifications to the browser's default search provider settings pointing to a suspicious domain (perplexity-ai.online), and outbound browser network traffic or DNS queries directed toward the same domain for potential data exfiltration.
Detects outbound network traffic from common web browsers (Chrome, Edge, Brave, etc.) to the typosquatted domain 'perplexity-ai.online'. This rule identifies behavior associated with a malicious browser extension ('Search for perplexity ai') that exfiltrates keystrokes and search queries captured via the browser's Omnibox functionality to an attacker-controlled server.
Detects anomalous SSH lateral movement originating from the Cisco SD-WAN Manager (vManage) to other control plane components (vSmart/vBond). This rule correlates network connections on port 22 with successful SSH logins using privileged or service-related accounts, which is indicative of potential post-exploitation activity or pivoting within an SD-WAN control plane environment.
This rule detects network connections to a list of domains identified as associated with phishing activities associated with Crimson Kingsnake. Monitoring these connections can help identify compromised systems or users attempting to access malicious sites.
Detects modifications to the 'SSLKEYLOGFILE' environment variable in the Windows Registry. This variable is often used by applications like web browsers to log SSL/TLS session keys to a file, which can then be used to decrypt encrypted network traffic. Malicious actors might enable this to capture sensitive data.
This rule detects potential command and control (C2) activity associated with a known npm RAT, identified by network connections to specific C2 infrastructure (95.216.92.207:8080) or DNS resolution of 'nvidiadriver.net'. The rule specifically flags these events when performed by common execution tools like 'python.exe' or 'chost.exe', or when the process image is running from a temporary directory, which is a common persistence or execution indicator for malware.
This rule monitors for suspicious activity associated with Flowise Model Context Protocol (MCP) implementations, specifically detecting environment variable bypasses using Node.js --require, potential Server-Side Request Forgery (SSRF) attempts targeting internal infrastructure and cloud metadata services, and the creation of known proof-of-concept (PoC) artifacts.
Detects indicators of a specific malicious browser extension, including file-system artifacts (extension directory placement), registry-based persistence mechanisms, and network communication to associated command-and-control (C2) or onboarding domains. The rule specifically monitors for known malicious identifiers related to a typosquatted domain campaign impacting popular web browsers.
This rule detects unauthorized attempts to extract credentials from the Veeam Backup and Replication PostgreSQL database. It identifies malicious activity involving the use of PowerShell to interact with the database, including direct psql.exe command line execution, PowerShell scripts referencing sensitive database keywords, WMI-spawned PowerShell processes, and network connections to the PostgreSQL service port (5432).
Detects unauthorized or anomalous modifications to local vector database files by non-standard processes.
Detects outbound HTTP requests exhibiting a User-Agent string hardcoded to mimic Firefox 20.0 (Mozilla/5.0 (Windows NT 6.2; rv:20.0) Gecko/20121202 Firefox/20.0), which is characteristic of the Adaptix C2 framework. This pattern is commonly used by adversaries for command-and-control communication.
Detects anomalous outbound connections to Microsoft Teams TURN relays from non-Teams processes. This behavior can be indicative of malware, such as Backdoor.Turn, abusing legitimate Microsoft Teams infrastructure for command and control or data exfiltration, by masquerading malicious traffic as legitimate conferencing application traffic.
Identifies anomalous requests to Microsoft TURN relays, potentially requesting anonymous visitor tokens. This rule looks for a high volume of network connections to 'turn.teams.microsoft.com' or 'relay.teams.microsoft.com' from processes other than the legitimate Microsoft Teams application, indicating potential abuse of the Teams infrastructure for malicious traffic tunneling.
Detects network traffic associated with known Cobalt Strike Beacon request URI patterns. This rule utilizes network signature inspection to flag outbound connections containing URI fragments commonly used by Cobalt Strike default profiles.
Detects anomalous network communication patterns and file system changes indicative of SoftEther VPN usage, particularly when linked to processes masquerading as VMware or communicating with known malicious C2 infrastructure. The rule monitors for network connections on common SoftEther ports, connections to specific command-and-control IP addresses, and the creation of SoftEther configuration files like 'hamcore.se2' or 'vpn_bridge.config'.
This rule monitors for network connections that occur over non-standard ports (STUN, MQTT) or to specific suspicious IP addresses and domains, while excluding known legitimate user-facing applications. The detection aims to identify potentially malicious command and control (C2) communication or unauthorized network activity performed by non-standard processes.
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