Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects outbound network connections (HTTPS/TLS) to known malicious domains used by TA419 for AitM (Adversary-in-the-Middle) phishing campaigns. These domains are identified as part of a spoofed OneDrive document/file sharing theme intended to steal user credentials.
Detects DNS queries and TLS SNI traffic associated with known lookalike domains used by the threat actor TA419 for organization impersonation, which are commonly utilized in spearphishing campaigns.
Detects DNS queries, HTTP host headers, and TLS SNI traffic associated with known credential-phishing domains used by the threat actor TA419. The rule monitors for communication to a specific list of domains identified as malicious or used in phishing campaigns.
Detects outbound HTTPS traffic to domains using file-sharing or cloud-sync themed keywords in combination with specific top-level domains (TLD) often associated with suspicious infrastructure. The rule specifically excludes well-known legitimate services such as OneDrive, SharePoint, Dropbox, Box, iCloud, and Google, and includes a detection threshold to minimize alerts for incidental traffic.
Detects outbound HTTPS traffic to domains using file-sharing or cloud-sync themed keywords in combination with specific top-level domains (TLD) often associated with suspicious infrastructure. The rule specifically excludes well-known legitimate services such as OneDrive, SharePoint, Dropbox, Box, iCloud, and Google, and includes a detection threshold to minimize alerts for incidental traffic.
This rule detects established TLS connections to external hosts that utilize a specific self-signed certificate associated with TA419 phishing infrastructure. The rule specifically flags connections presenting a TLS certificate with Subject and Issuer fields containing 'C=US, ST=Kansas, L=Millsstad, O=Castro Inc, CN=CI'.
This rule detects established TLS connections to external hosts that utilize a specific self-signed certificate associated with TA419 phishing infrastructure. The rule specifically flags connections presenting a TLS certificate with Subject and Issuer fields containing 'C=US, ST=Kansas, L=Millsstad, O=Castro Inc, CN=CI'.
This rule detects established TLS connections to external hosts that utilize a specific self-signed certificate associated with TA419 phishing infrastructure. The rule specifically flags connections presenting a TLS certificate with Subject and Issuer fields containing 'C=US, ST=Kansas, L=Millsstad, O=Castro Inc, CN=CI'.
This rule detects established TLS connections to external hosts that utilize a specific self-signed certificate associated with TA419 phishing infrastructure. The rule specifically flags connections presenting a TLS certificate with Subject and Issuer fields containing 'C=US, ST=Kansas, L=Millsstad, O=Castro Inc, CN=CI'.
This rule detects an exploitation attempt targeting a memory overflow vulnerability in Citrix NetScaler Gateway, specifically identifying oversized DTLS handshake length fields in UDP traffic. The rule triggers when a DTLS packet exceeds the specified size threshold, which is indicative of a buffer overflow attack intended to cause a service crash (Denial of Service).
This rule detects an exploitation attempt targeting a memory overflow vulnerability in Citrix NetScaler Gateway, specifically identifying oversized DTLS handshake length fields in UDP traffic. The rule triggers when a DTLS packet exceeds the specified size threshold, which is indicative of a buffer overflow attack intended to cause a service crash (Denial of Service).
This rule detects an exploitation attempt targeting a memory overflow vulnerability in Citrix NetScaler Gateway, specifically identifying oversized DTLS handshake length fields in UDP traffic. The rule triggers when a DTLS packet exceeds the specified size threshold, which is indicative of a buffer overflow attack intended to cause a service crash (Denial of Service).
Detects unauthenticated HTTP POST requests to the /prompt endpoint of a ComfyUI instance, which is indicative of an attempt to remotely execute workflows on an exposed instance.
Detects inbound HTTP POST requests to the /generate endpoint of a Hugging Face Text Generation Inference (TGI) server. Such requests indicate attempts to use or interact with the inference API, potentially without authentication, which could lead to unauthorized resource utilization or model interaction if the service is not properly secured.
This rule monitors for a rapid sequence of TCP SYN packets directed towards common administrative ports (SSH/22, RDP/3389, SMB/445) within a short window, indicative of an automated lateral movement scanning attempt or a brute-force discovery phase originating from within the internal network.
This rule detects external reconnaissance attempts targeting MLflow Tracking Servers by monitoring for inbound HTTP GET requests to the default MLflow API path '/api/2.0/mlflow/'. This behavior is indicative of an adversary scanning for exposed machine learning infrastructure, potentially to facilitate subsequent unauthorized access or exploitation of the tracking server.
Detects outbound HTTP traffic from internal hosts directed toward a known IP address identified as hosting AdaptixC2 infrastructure, specifically associated with the distribution of a trojanized 'mscopilot.exe' executable.
This rule detects established TLS connections to external domains that exhibit characteristics often associated with phishing campaigns. Specifically, it looks for domain names in the SNI field that contain common brand names (e.g., microsoft, google, paypal) combined with typical login-related keywords (e.g., login, verify, auth) on high-churn or suspicious Top-Level Domains (TLDs) such as .top, .xyz, or .icu.
Detects network traffic associated with Adversary-in-the-Middle (AiTM) phishing kits that impersonate Microsoft and Google login pages. The rules identify the presence of specific HTML elements (like Cloudflare Turnstile anti-bot gates) and authentication session cookie headers served from non-authorized/non-official domains, indicating a reverse-proxy phishing attack.
Detects outbound network traffic associated with the Azazel operation, including connections to identified C2 infrastructure, open directory/upload listeners, domain-specific staging servers, and exfiltration attempts to MEGA cloud storage endpoints.
Detects attempts to exploit Oracle WebLogic Server vulnerabilities, specifically those leveraging the T3 protocol to transmit malicious Java serialized payloads, as seen in CVE-2026-70756. The rule identifies suspicious T3 handshake patterns and the presence of common Java deserialization gadget chains.
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