Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects network connections to a predefined list of malicious domains, many of which are hosted on Vercel and appear to be associated with phishing campaigns. The domains often mimic legitimate services or financial documents, suggesting an attempt to deliver malware or steal credentials through phishing. The rule specifically looks for these domains in the 'RemoteUrl' field of 'DeviceNetworkEvents'.
Detects network traffic to fallback command and control (C2) domains generated by the 'Children Protection' malicious browser extension. The extension uses a Domain Generation Algorithm (DGA) based on the current date to provide resilient C2 infrastructure.
Esta detección identifica posibles conexiones relacionadas con el uso de VPNs dentro del entorno corporativo, correlacionando puertos asociados a protocolos VPN, dominios no habituales, procesos iniciadores y adaptadores de red virtuales o tunelizados. El objetivo es descubrir actividad de VPN no autorizada, conexiones cifradas ocultas dentro de tráfico HTTPS y el uso de extensiones de navegador que actúan como túneles tipo VPN.
La lógica de esta consulta aplica múltiples capas de filtrado para reducir falsos positivos:
- Filtra conexiones salientes hacia puertos característicos de IPsec, OpenVPN, WireGuard, L2TP y PPTP.
- Detecta túneles sobre puerto 443 cuando el proceso iniciador no corresponde a aplicaciones del sistema.
- Excluye ruido generado por procesos de Windows y dominios legítimos asociados a Microsoft, Google y servicios cloud corporativos.
- Identifica adaptadores TAP, TUN, Wintun, WireGuard, Tailscale o ZeroTier presentes en el host.
- Clasifica el tipo probable de VPN según el puerto utilizado y el proceso que inicia la conexión.
Esta detección permite encontrar:
- Clientes VPN instalados sin autorización.
- Extensiones de navegador que establecen túneles SSL-VPN encubiertos.
- Herramientas de túneles encubiertos como WireGuard stealth, Tailscale o ZeroTier.
- Actividad anómala desde navegadores que podría indicar proxies cifrados o VPNs embebidas.
La lógica de esta consulta aplica múltiples capas de filtrado para reducir falsos positivos:
- Filtra conexiones salientes hacia puertos característicos de IPsec, OpenVPN, WireGuard, L2TP y PPTP.
- Detecta túneles sobre puerto 443 cuando el proceso iniciador no corresponde a aplicaciones del sistema.
- Excluye ruido generado por procesos de Windows y dominios legítimos asociados a Microsoft, Google y servicios cloud corporativos.
- Identifica adaptadores TAP, TUN, Wintun, WireGuard, Tailscale o ZeroTier presentes en el host.
- Clasifica el tipo probable de VPN según el puerto utilizado y el proceso que inicia la conexión.
Esta detección permite encontrar:
- Clientes VPN instalados sin autorización.
- Extensiones de navegador que establecen túneles SSL-VPN encubiertos.
- Herramientas de túneles encubiertos como WireGuard stealth, Tailscale o ZeroTier.
- Actividad anómala desde navegadores que podría indicar proxies cifrados o VPNs embebidas.
A widespread campaign employs malvertising to distribute converter tools that secretly install persistent Remote Access Trojans. These droppers establish scheduled tasks and leverage code signing to load and execute further malicious .NET assemblies from command-and-control servers, enabling continuous system access and data exfiltration.
Detects network connections from a node.js process to a known C2 server address (87.236.177.9:3000) used by DPRK-linked threat actors.
This rule detects network connections to known cryptocurrency mining pools or domains associated with cryptocurrency mining activities. It specifically looks for keywords like 'miningpool', 'stratum', 'xmr', 'ethash', 'moneropool' in the remote URL or specific IP addresses like 'connect.moneropool.com' and 'pool.supportxmr.com'. This activity often indicates unauthorized resource hijacking (cryptojacking) on the affected device.
Detects processes, other than legitimate web browsers or the official Telegram client, making DNS queries for the Telegram Bot API. This behavior is indicative of malware using Telegram for command-and-control (C2) or data exfiltration, as seen in a campaign leveraging Amnesia RAT.
This rule detects common chromium browser processes establishing outbound network connections to known C2 domains associated with malicious 'ChatGPTStealer' infostealer extension. Detections by this rule indicates a high likelihood that a malicious chromium infostealer extension is currently or had been installed on an endpoint.
Detects large volumes of outbound data transfers using the Cyberduck application to known cloud storage providers. The Qilin ransomware group has been observed using Cyberduck for data exfiltration.
This rule detects outbound network connections initiated by 'chrome.exe' to a predefined list of known Command and Control (C2) domains over HTTPS (port 443). This indicates potential communication with malicious infrastructure.
This rule detects network connections initiated by 'tor.exe' or 'meek-client.exe', indicating potential use of the Tor anonymity network. It enriches the events with process and certificate information to provide context about the initiating process and its trust status.
This rule detects common chromium browser processes establishing outbound network connections to known C2 domains associated with malicious 'ChatGPTStealer' infostealer extension. Detections by this rule indicates a high likelihood that a malicious chromium infostealer extension is currently or had been installed on an endpoint.
Detects Microsoft Word making an outbound network connection and subsequently spawning the Equation Editor process (EQNEDT32.EXE). This behavior is associated with the exploitation of CVE-2017-11882 via a malicious remote template.
This query detects network communication to known Command and Control (C2) IP addresses used by the Medusa ransomware group, often via malicious SimpleHelp RMM servers.
This detection identifies outbound network traffic to domains, IP addresses, or a specific port known to be associated with the PHALT#BLYX campaign's infrastructure. The campaign uses these for malware delivery and DCRat command and control (C2). The rule specifically looks for connections to known malicious IPs or domains, or connections on port 3535 (used by DCRat) originating from processes associated with the malware (staxs.exe, tybd7.exe, aspnet_compiler.exe).
Detects outbound network traffic with a User-Agent header indicating the use of the Rust 'reqwest' HTTP client library. This User-Agent is used by the RustyWater implant, associated with the MuddyWater APT group, for command and control (C2) communications.
vvs-stealer
KQL
This rule detects activities associated with the VVS Stealer malware, as described in the Palo Alto Networks Unit 42 blog. It identifies the malware through specific SHA256 hashes of known VVS Stealer executables, network connections to hardcoded Discord webhook URLs used for exfiltration, persistence mechanisms via creation of executables in Windows startup folders, creation of '_vault.zip' files (likely containing stolen data), and suspicious Discord-related process activity indicative of the stealer's operation.
Detects network communication patterns
This rule detects network connections from devices to a predefined list of known malicious domains. It identifies attempts by internal systems to communicate with command and control servers, phishing sites, or other infrastructure associated with threat actors.
This rule detects outbound network connections to domains associated with the Tykit malware family or domains matching a specific regular expression pattern often used for credential harvesting (e.g., 'loginmicr.s*.cc'). It leverages an external intelligence feed for known Tykit domains and a regex for common phishing/credential theft patterns.
This rule detects potential command and control (C2) activity by identifying devices that first query 'api.ipify.org' (often used by malware to determine external IP addresses) and then subsequently establish an outbound network connection on port 7712 to a non-private IP address. This sequence of events can indicate a compromised host attempting to beacon out to a C2 server after initial reconnaissance.
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