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Arnold Chan

@slaz
Trusted contributorCompletionist
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7,555 detections

Detects modifications to the 'crond' daemon binary followed closely (within 5 minutes) by a restart or start command via common system management utilities. This behavior is highly indicative of potential persistence mechanisms where an adversary replaces a system binary with a malicious version.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects the CurlRAT malware interactive shell behavior where legitimate Linux system daemons (atd, crond, agetty, polkitd) are trojanized or abused to execute shell commands with attacker-supplied network endpoints (IP:Port).
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Arnold Chan@slaz
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Hunters
2 months ago
001
This rule detects potential unauthenticated access or unauthorized configuration modifications to an AI agent management backend. It monitors HTTP logs for requests targeting configuration endpoints that lack proper authentication, specifically identifying attempts to retrieve sensitive information like Dify or Coze keys, or attempts to inject new agent configurations via unauthenticated POST requests.
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Arnold Chan@slaz
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Hunters
2 months ago
001
This rule detects the use of 'mshta.exe' to execute a file from a remote location by inspecting the command line for 'http' protocols and a specific suspicious domain. Adversaries often abuse mshta.exe to proxy the execution of malicious HTML Application (HTA) files or scripts to bypass security controls.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects outbound web requests directed at public NPM mirrors and CDNs (unpkg, npmmirror, yarnpkg, jsdelivr) that contain strings matching known malicious package names associated with the 'Beamglea/ClickFix' campaign. This activity is typically indicative of a victim visiting a deceptive Cloudflare CAPTCHA phishing page designed to execute malicious scripts in the browser.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects unexpected child process execution (php, bash, sh) by web server processes (php-fpm, apache, nginx) while accessing specific Magento application directories (var/report, var/log/system.log) or parameters often associated with the StyleSmuggler exploitation technique, indicating potential Remote Code Execution.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects a PHP TypeError in Magento system logs where array_merge() is called with an integer argument following an include statement. This signature is indicative of exploitation attempts targeting Magento sites using the StyleSmuggler vulnerability, which often involves malicious file inclusion and code execution.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects evidence of persistence mechanisms associated with the StyleSmuggler implant. The rule monitors for malicious crontab entries and file system activity related to gvfsd-user, .gvfsd, and /tmp/.kw_ artifacts.
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Arnold Chan@slaz
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Hunters
2 months ago
001
Detects processes named 'kworker' (in bracket notation) that are not initiated by the legitimate 'kthreadd' parent process, which is indicative of a process masquerading as a kernel worker thread. Legitimate kworker processes are kernel threads managed by kthreadd. Processes masquerading as these can be used by malware to hide in plain sight.
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Arnold Chan@slaz
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Hunters
2 months ago
001
This rule detects a high volume of inbound network connection attempts to the default Redis port (6379) originating from local loopback or local host addresses, excluding known legitimate Redis and web server processes. This activity is indicative of potential unauthorized access attempts or exploitation of local Redis instances.
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Arnold Chan@slaz
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Hunters
2 months ago
001
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