Daniel Jeremiah
@daniyyellUnited KingdomTrusted contributorCompletionist
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978 detections
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Detects a remote support or loader process spawning a suspended process or invoking commands associated with RunPE and hollowing. This rule specifically looks for processes initiated by 'ScreenConnect', 'SimpleRunPE', or 'ClientService' that include command-line arguments indicative of process hollowing or injection techniques such as 'CREATE_SUSPENDED', 'NtUnmapViewOfSection', 'RunPE', 'hollow', or 'process injection'.
Detects command-line clearing of security, system, application, or PowerShell event logs to impede investigation. This rule specifically looks for the use of 'wevtutil.exe', 'powershell.exe', or 'cmd.exe' with command-line arguments indicative of clearing event logs, such as 'wevtutil.*(cl|clear-log)', 'Clear-EventLog', or 'Remove-EventLog'.
Detects PowerShell or command-line modification of Defender real-time monitoring immediately before ransomware activity. This rule specifically looks for commands that disable real-time monitoring within Microsoft Defender.
Detects a game-related child process collecting username, language, timezone, keyboard layout, and regional settings in one sequence. This rule specifically looks for command-line executions using 'cmd.exe', 'powershell.exe', or 'wmic.exe' that include commands like 'whoami', 'Get-WinSystemLocale', 'Get-TimeZone', 'Get-WinUserLanguageList', 'keyboard layout', or 'Win32_TimeZone'.
This rule detects the creation of a '_vault.zip' archive, which is characteristic of the VVS Stealer malware, followed by network activity to Discord from the same process within a 15-minute window. VVS Stealer uses these archives to store stolen browser data (passwords, cookies, history, autofill) before exfiltrating it, often via Discord webhooks.
Detects a rapid burst of file upload activity to cloud storage applications from a single account, including unusual proxy or device context. This rule identifies scenarios where an account performs 20 or more upload events or uploads 20 or more distinct objects within a 15-minute time window to common cloud storage services like Google Drive, Dropbox, Box, MEGA, OneDrive, or ShareFile. It also highlights if any of these uploads originate from an anonymous proxy.
This rule targets suspicious process launches where an executable, specifically a `.exe` file, is executed from a temporary directory (e.g., `temp` or `appdata\local\temp`). The detection is further refined by looking for a command line pattern where the executable is followed by a numeric argument (1 to 10 digits) and then a long Base64-like string (at least 40 characters long, optionally padded with '=='). This pattern is often observed in malware that uses temporary files and obfuscated command-line parameters for execution.
Detects a successful self-service password reset for a privileged or high-value account when the initiating context does not match an approved helpdesk workflow. This could indicate an attacker attempting to gain access to an account by resetting its password without proper authorization.
Detects thousands of OneDrive or SharePoint file downloads by a single account during a short period, indicating automated collection rather than ordinary user activity.
Detects execution of a SimpleRunPE-style loader from common user-writable directories such as Downloads, Temp, AppData, or Public paths. This behavior is often associated with malware attempting to evade detection by executing from non-standard locations.
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