Darshan Thummar
@MightyCompletionist
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2,107 detections
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Detects bulk download of AWS S3 objects indicating cloud data theft
This rule detects a multi-stage command and control (C2) domain rotation pattern by identifying DNS queries for domains that match a specific regular expression. The pattern looks for domains consisting of 6 to 12 lowercase alphanumeric characters followed by one of several top-level domains (xyz, top, icu, club, online). A threshold of 5 such queries from the same source within 60 seconds is used to trigger the alert, indicating potential malicious activity like fast flux or domain generation algorithms (DGAs) used by malware for C2 communication.
Detects cmd.exe spawned from web server process
Detects DNS-based data exfiltration via high-volume TXT record queries
Detects Cobalt Strike based on default TLS certificate patterns
Detects bulk cloning of GitHub repositories for source code collection
This rule detects attempts to overwrite the Master Boot Record (MBR) or disk structure using the 'dd' command via a remote SSH connection. Specifically, it looks for the string 'dd if=/dev/zero of=/dev/sda' within TCP traffic on port 22 (SSH). This command, if executed, would wipe the primary disk, leading to system destruction.
Detects suspicious AWS STS AssumeRole calls for temporary elevated access
Detects HID keystroke injection attacks from hardware implants
Detects use of strip or UPX to remove debug information from malware
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