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Arnold Chan

@slaz
Trusted contributorCompletionist
2 followers2,100 downloads4,385 copies51 likes26,175 views

7,555 detections

Detects anomalous SSH authentication patterns characterized by a high volume of failed logon attempts (>= 10) originating from a specific IP address within a short timeframe (30 minutes), followed by a successful authentication to the same target device. This pattern is indicative of a successful credential brute-force or password guessing attack against an exposed SSH service.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
000
This rule detects potentially malicious use of residential proxies by monitoring for outbound HTTP CONNECT requests originating from consumer devices in the internal network. The use of HTTP CONNECT is a common method for establishing tunnels through proxies to mask C2 communication or facilitate unauthorized access, often associated with botnets or malicious proxy networks.
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Arnold Chan@slaz
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Hunters
2 months ago
000
This rule detects potentially malicious use of residential proxies by monitoring for outbound HTTP CONNECT requests originating from consumer devices in the internal network. The use of HTTP CONNECT is a common method for establishing tunnels through proxies to mask C2 communication or facilitate unauthorized access, often associated with botnets or malicious proxy networks.
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Arnold Chan@slaz
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Midnight Slayer
2 months ago
000
This rule detects the execution of processes associated with CLI proxy routers (such as CLIProxyAPI or router-for-me) that establish network connections to multiple AI provider APIs (e.g., Anthropic, OpenAI, Google Gemini) within a short window. This pattern is indicative of efforts to bypass rate-limiting or allowlisting mechanisms commonly used by corporate environments to control and audit AI service interactions.
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Arnold Chan@slaz
Defender - KQL
2 months ago
000
Detects high-volume filesystem activity (exceeding 300 operations in 5 minutes) initiated by 'claude-code' or 'claude' processes. This behavior may indicate an autonomous, patched, or jailbroken AI coding assistant performing mass file operations or reconnaissance without user confirmation.
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Arnold Chan@slaz
Defender - KQL
2 months ago
000
Detects high-volume filesystem activity (exceeding 300 operations in 5 minutes) initiated by 'claude-code' or 'claude' processes. This behavior may indicate an autonomous, patched, or jailbroken AI coding assistant performing mass file operations or reconnaissance without user confirmation.
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Arnold Chan@slaz
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Hunters
2 months ago
000
This rule detects high-frequency TCP SYN connection attempts originating from external networks targeting common administrative or tunneling ports (1723/PPTP, 1701/L2TP, 22/SSH) on internal systems. The detection uses a threshold of 100 connection attempts within 120 seconds, which is characteristic of automated reconnaissance and network scanning behavior.
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Arnold Chan@slaz
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Hunters
2 months ago
000
Detects anomalous authentication behavior where a user account utilizes the same authentication session (LogonId) or material to authenticate across multiple distinct destination hosts in a short timeframe. This rule monitors for both NTLM (Type 3) and Kerberos (TGS/TGT) events, which are indicative of lateral movement techniques such as Pass-the-Hash or Pass-the-Ticket.
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Arnold Chan@slaz
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Detections.ai Community
2 months ago
207
Detects anomalous cloud authentication events occurring within a 3-hour window after suspected unauthorized access to sensitive configuration or credential files on a Vite development server. The rule flags sign-ins with high risk, anomalous location, or missing device compliance information, excluding trusted corporate locations and devices, serving as an indicator of potential post-exfiltration account takeover.
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Arnold Chan@slaz
Defender - KQL
2 months ago
001
Detects successful exploitation attempts targeting Vite development servers via chained access-control bypass vulnerabilities (CVE-2025-30208, CVE-2025-31125, CVE-2024-45811). The rule identifies malicious GET requests using the /@fs/ endpoint with specific query parameters, resulting in a successful HTTP 200 response, while originating from non-internal IP addresses.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
001
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