Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects data exfiltration split into many small HTTP POST requests
This rule detects anomalous DNS query activity that may indicate command and control (C2) or data exfiltration over the DNS protocol. It monitors for three specific indicators: excessive query volume to a single domain family within a short timeframe, the use of abnormally long DNS subdomain labels, and the transmission of TXT record queries from endpoints not acting as designated DNS servers.
Tracks network connections from non-browser processes that transmit an abnormally large volume of outbound bytes, indicating active data exfiltration. This rule specifically excludes common browser processes (chrome.exe, msedge.exe, firefox.exe) and OneDrive (onedrive.exe) to reduce false positives. It aggregates outbound network activity over 10-minute intervals and flags any instance where the total outbound bytes exceed 100MB.
Credential and browser data stealer distributed via OXLOADER campaigns
Credential and browser data stealer distributed via OXLOADER campaigns
This rule detects outbound network connections to common webhook and temporary storage services (e.g., discord.com webhooks, webhook.site, pipedream.net) initiated by processes other than standard web browsers. Such behavior is often indicative of automated data exfiltration, command-and-control (C2) communication, or malicious script activity using these services to bypass traditional network defenses.
Detects network traffic over SMB targeting the SYSVOL or NETLOGON network shares that includes the transfer or reference of common executable file extensions. This behavior is indicative of an adversary attempting to stage malicious payloads for deployment via Group Policy Objects (GPOs), a common method for lateral movement and persistence.
Detects HTTP PUT requests directed at Wasabi Cloud Storage domains that originate from an Rclone user agent. This pattern is commonly indicative of data exfiltration activities where an attacker uses the Rclone utility to synchronize or upload sensitive data to unauthorized cloud storage.
Detects network traffic over SMB targeting the SYSVOL or NETLOGON network shares that includes the transfer or reference of common executable file extensions. This behavior is indicative of an adversary attempting to stage malicious payloads for deployment via Group Policy Objects (GPOs), a common method for lateral movement and persistence.
Detects outbound HTTP POST requests where the Content-Length header indicates a data transfer of 5MB or greater. This pattern is indicative of potential unauthorized data exfiltration over the web protocol.
Detects repeated use of the FTP 'STOR' command to transmit data to an external host within a short timeframe. The STOR command is used in the File Transfer Protocol (FTP) to upload a file to the server. An unusual frequency of this command toward external destinations may indicate data exfiltration.
Detects large HTTP POST requests (over 5MB) directed at external hosts that utilize multipart or chunked encoding, which are commonly used to obfuscate or stream large volumes of data during an exfiltration event.
Detects encrypted WebSocket sessions over non-standard ports or TLS traffic patterns indicative of Bluekit Phishing-as-a-Service (PaaS) session token exfiltration to unauthorized command and control (C2) infrastructure.
This rule monitors for FTP 'STOR' commands followed by large data transfers (exceeding 64KB) initiated from internal hosts to external destinations. This pattern is often indicative of data exfiltration using the File Transfer Protocol (FTP).
Detects outbound HTTP POST requests where the Content-Length header indicates a data transfer of 5MB or greater. This pattern is indicative of potential unauthorized data exfiltration over the web protocol.
This rule detects HTTP POST requests containing a Content-Length header value indicating a body size exceeding 10MB. Large POST requests may indicate data exfiltration, large file uploads, or misuse of HTTP channels for data transfer to external destinations.
Detects anomalous browser activity where an endpoint retrieves configuration or scriptlets from the BadBlocker-related API, followed shortly by outbound network connections to suspicious domains or the exfiltration of sensitive browser-based session data like document.cookie, localStorage, or sessionStorage.
This rule detects outbound network connections to common webhook and temporary storage services (e.g., discord.com webhooks, webhook.site, pipedream.net) initiated by processes other than standard web browsers. Such behavior is often indicative of automated data exfiltration, command-and-control (C2) communication, or malicious script activity using these services to bypass traditional network defenses.
This rule detects outbound network connections to common webhook and temporary storage services (e.g., discord.com webhooks, webhook.site, pipedream.net) initiated by processes other than standard web browsers. Such behavior is often indicative of automated data exfiltration, command-and-control (C2) communication, or malicious script activity using these services to bypass traditional network defenses.
Detects network traffic on port 443 originating from non-browser processes destined for known DNS-over-HTTPS (DoH) providers (Cloudflare, Google, Quad9). This behavior can indicate an attempt to bypass standard network DNS filtering or to establish Command and Control (C2) communication channels using the DoH protocol.
Detects network traffic on port 443 originating from non-browser processes destined for known DNS-over-HTTPS (DoH) providers (Cloudflare, Google, Quad9). This behavior can indicate an attempt to bypass standard network DNS filtering or to establish Command and Control (C2) communication channels using the DoH protocol.
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