avatar

Arnold Chan

@slaz
Trusted contributorCompletionist
2 followers2,100 downloads4,386 copies51 likes26,184 views

7,555 detections

Detects a suspicious multi-step process injection sequence originating from an obfuscated PowerShell process. The rule identifies PowerShell executing with common obfuscation flags (e.g., -enc, -nop, IEX) and performing multiple API calls (such as NtAllocateVirtualMemoryRemote, NtSetContextThreadRemote, CreateRemoteThread, or OpenProcess) targeting specific executables like csc.exe, chrome.exe, msedge.exe, or SearchIndexer.exe.
avatar
Arnold Chan@slaz
avatar
Detections.ai Community
2 months ago
003
This rule detects potential unauthorized use of MeshAgent RMM software by correlating process execution events (mvtcs.exe, MeshAgent) with network traffic to specific IP addresses identified as associated with Settra command-and-control infrastructure. It specifically filters for MeshAgent activity and validates the threat by requiring an established network connection to known malicious endpoints.
avatar
Arnold Chan@slaz
avatar
Midnight Slayer
2 months ago
003
This rule detects the presence, installation, or execution attempts of the known vulnerable GIGABYTE driver (gdrv.sys). Monitoring for this specific driver is a common practice to identify attempts to perform 'Bring Your Own Vulnerable Driver' (BYOVD) attacks, which can be used for kernel-mode code execution and privilege escalation.
avatar
Arnold Chan@slaz
avatar
Hunters
2 months ago
003
This rule detects the presence, installation, or execution attempts of the known vulnerable GIGABYTE driver (gdrv.sys). Monitoring for this specific driver is a common practice to identify attempts to perform 'Bring Your Own Vulnerable Driver' (BYOVD) attacks, which can be used for kernel-mode code execution and privilege escalation.
avatar
Arnold Chan@slaz
Defender - KQL
2 months ago
003
This rule detects potential unauthorized use of MeshAgent RMM software by correlating process execution events (mvtcs.exe, MeshAgent) with network traffic to specific IP addresses identified as associated with Settra command-and-control infrastructure. It specifically filters for MeshAgent activity and validates the threat by requiring an established network connection to known malicious endpoints.
avatar
Arnold Chan@slaz
avatar
Detections.ai Community
2 months ago
003
This rule detects potential ransomware activity by correlating three distinct events: the execution of a suspicious, potentially obfuscated binary (matching a specific naming pattern of _win64.exe) from an untrusted location (e.g., Temp, AppData, Downloads), followed by a high volume of file modifications or renames with specific ransomware-related extensions (.locked), and the dropping of a known ransom note file (RESTORE_FILES.txt) within a short 15-minute time window.
avatar
Arnold Chan@slaz
avatar
Detections.ai Community
2 months ago
003
Detects instances where AI coding assistants or tools (e.g., Claude, Copilot, Gemini) invoke git.exe to clone or fetch repositories from non-standard (non-GitHub) hosts, followed by a checkout operation within a short timeframe. This behavior may indicate an attacker using automated tools to stage or exfiltrate sensitive code repositories to unauthorized infrastructure.
avatar
Arnold Chan@slaz
Defender - KQL
2 months ago
003
This rule detects potential attempts to tamper with or bypass Windows Defender by monitoring for files or processes named 'ShieldCrash' occurring in close temporal proximity to the creation or modification of files within Windows Defender's shadow or scan directories (BaseNamedObjects\Restricted\WD_SHADOW_ or WD_SCAN). This behavior is often associated with malware attempting to evade security detection.
avatar
Arnold Chan@slaz
Defender - KQL
2 months ago
21042
Detects post-exploitation shell activity spawned from the IIS worker process (w3wp.exe), narrowed to command lines carrying encoded/obfuscated PowerShell flags, remote-download cradles, or basic recon/persistence commands (whoami, certutil, bitsadmin, schtasks, reg add). This reduces noise from benign w3wp.exe-initiated automation while retaining the behavioral pattern seen in the Telerik UI for ASP.NET AJAX unauthenticated RCE chain (webshell/in-memory DLL execution dropping to a shell).
avatar
Arnold Chan@slaz
Defender - KQL
2 months ago
209
This rule monitors endpoint telemetry (File, Process, and Network events) to identify activity associated with a pre-defined set of known malicious file hashes, IP addresses, and domains. It correlates these indicators to detect potential malware execution, persistence, or command-and-control communication on monitored devices.
avatar
Arnold Chan@slaz
avatar
Detection & Hunting Community
2 months ago
104
Page 308 of 756