Arnold Chan
@slazTrusted contributorCompletionist
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7,555 detections
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Detects instances where the outbound byte count to external (non-private) IP addresses for a source host significantly exceeds its historical hourly baseline. This detection is designed to identify potential data exfiltration stages occurring after system or network compromise.
Detects the silent installation of remote monitoring and management (RMM) software using 'msiexec.exe' initiated by scripting engines (powershell.exe, wscript.exe, or cscript.exe). The rule targets installations occurring in user-writable directories, such as Temp or Downloads, which are common staging locations for malicious droppers, while excluding known legitimate software deployment paths.
This rule detects network connections or process command lines associated with known malicious domains, IP addresses, or payload URLs. Additionally, it correlates connections to common public file-sharing platforms or APIs (e.g., Gofile, Telegram) if these events occur on the same device within a 60-minute window of a confirmed malicious infrastructure event, reducing false positives from legitimate uses of shared infrastructure.
Detects DNS queries and TLS SNI traffic directed towards domains identified as part of Storm-3121/Storm-3032 phishing campaigns. These domains are themed around passkey management and single sign-on (SSO) services, likely intended for credential harvesting.
Detects the execution of base64 encoded PowerShell commands initiated by conhost.exe with the --headless flag. The decoded command contains specific suspicious patterns, including accessing environment variables, reading file content, and deleting files, which is characteristic of malicious scripts attempting to stealthily interact with the environment.
Detects the execution of base64 encoded PowerShell commands initiated by conhost.exe with the --headless flag. The decoded command contains specific suspicious patterns, including accessing environment variables, reading file content, and deleting files, which is characteristic of malicious scripts attempting to stealthily interact with the environment.
Detects the execution of PowerShell with encoded commands, specifically when initiated by a 'conhost.exe' process running with the '--headless' flag. The rule further inspects the decoded command to identify patterns indicative of .NET reflection-based code execution, often used in malicious activity such as reflective assembly loading.
Detects the execution of PowerShell with encoded commands, specifically when initiated by a 'conhost.exe' process running with the '--headless' flag. The rule further inspects the decoded command to identify patterns indicative of .NET reflection-based code execution, often used in malicious activity such as reflective assembly loading.
Detects the execution of PowerShell with encoded commands, specifically when initiated by a 'conhost.exe' process running with the '--headless' flag. The rule further inspects the decoded command to identify patterns indicative of .NET reflection-based code execution, often used in malicious activity such as reflective assembly loading.
This rule detects attempts to tamper with the Anti-Malware Scan Interface (AMSI) or suspicious modifications to the memory of common scripting and proxy processes (powershell.exe, pwsh.exe, rundll32.exe, mshta.exe, wscript.exe, cscript.exe). Such activities are often indicative of an adversary attempting to bypass security detection mechanisms to execute malicious code or hide their presence.
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