Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
117 detections
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Detects connections to common proxy ports on potentially compromised servers
This rule detects an unusually high volume of network connections to common proxy ports (3128, 8080, 80, 443) initiated by critical system processes such as 'services.exe', 'svchost.exe', or 'rundll32.exe'. This behavior can indicate the installation and use of a trojan proxy or other malicious software attempting to exfiltrate data or establish command and control through a proxy.
Detects CONNECT tunneling via compromised VPS servers used as proxy relay
This rule detects the use of an external proxy service to mask Command and Control (C2) origin. It specifically looks for HTTP traffic where the 'X-Forwarded-For' header is present and the HTTP method is 'CONNECT'. A threshold of 10 occurrences within 60 seconds from the same source IP is applied to reduce false positives.
Detects svchost hosting RDP termsvcs communicating with the loopback address
Detects CL-UNK-1068's custom-compiled Fast Reverse Proxy (FRP) variant based on unique command-line artifacts.
This rule detects suspicious activity related to WebView2 processes interacting with AI webchat domains, potentially indicating covert command and control (C2) proxying or other malicious use. It looks for WebView2 traffic to specific AI domains (Grok, Copilot) originating from unusual parent processes, WebView2 access to Grok with URL parameter-driven prompt execution, and suspicious child process execution (cmd.exe, powershell.exe, calc.exe) where WebView2 is the parent process.
Detects the execution of iptables commands used for Single Packet Authorization (SPA), a technique observed being used by UNC6201. This rule identifies when iptables is configured to inspect traffic on port 443 for a specific hex string, which is a key component of the actor's C2 proxying tradecraft.
Hunts for Indicators of Compromise (IOCs) associated with the upStage proxyware campaign, which distributes malware via fake software installers (e.g., 7-Zip). This query searches for known file hashes, file paths, and network connections.
The analytic detects the execution of `gpupdate.exe` without command line arguments and with an active network connection. This behavior is identified using Endpoint Detection and Response (EDR) telemetry, focusing on process execution and network traffic data. It is significant because `gpupdate.exe` typically runs with specific arguments, and its execution without them, especially with network activity, is often associated with malicious software like Cobalt Strike. If confirmed malicious, this activity could indicate an attacker leveraging `gpupdate.exe` for lateral movement, command and control, or other nefarious purposes, potentially leading to system compromise.
This rule detects successful or failed logon attempts originating from IP addresses identified by threat intelligence as associated with botnets, command and control (C2) infrastructure, or proxies. The rule specifically looks for 'LogOn' or 'FailedLogOn' activity types where the source IP's threat intelligence indicator type is 'Botnet', 'C2', or 'Proxy', and where activity insights are available.
This rule detects potential proxy bypass attempts by identifying network connections on common web ports (80, 443) that are allowed by the network firewall but do not appear in the proxy logs. It correlates network traffic from the Network_Traffic data model with proxy traffic from the Web data model. The rule specifically filters for external-bound traffic by excluding private and multicast IP addresses.
Detects Odyssey Infostealer, a macOS malware known for stealing sensitive data and establishing persistence. This rule identifies specific strings related to its C2 communication, data theft, and persistence mechanisms.
Detects the creation of the Tor process from a specific directory using command line arguments indicative of controlling and logging ports.
Detects the execution of the NightEagle APT group's Chisel-based malware, SynologyUpdate.exe, with specific command-line arguments indicating C2 communication and proxy functionality. This malware is used for internal network penetration and data exfiltration.
KQL Query from file: External Attack Surface Monitoring KQL
KQL Query from file: Check for Azure Outdated Security Protocols
KQL Query
KQL Query from file: Muddled Libra
Detects svchost hosting RDP termsvcs communicating with the loopback address
Detects an executable accessing the portmap.io domain, which could be a sign of forbidden C2 traffic or data exfiltration by malicious actors
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