Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
7 followers9,573 downloads10,253 copies160 likes55,634 views
8,655 detections
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Detects the use of native Windows utilities (vssadmin.exe, wbadmin.exe, bcdedit.exe, and diskshadow.exe) to delete volume shadow copies, clear backup catalogs, or modify boot configuration to inhibit system recovery, a common behavior observed in ransomware attacks.
Detects potential lateral movement via Windows Management Instrumentation (WMI) by monitoring for WMI processes spawning interactive shells (cmd, powershell) or executing remote process calls using the /node syntax. Includes exclusions for common administrative tools associated with Microsoft management platforms.
Detects instances where non-browser processes attempt to open a handle to common web browsers (Chrome, Edge, Firefox). This behavior is indicative of unauthorized memory access or process injection techniques often used to harvest session cookies or other sensitive data stored in browser memory space.
Detects unauthorized processes, such as shells, scripting engines, or command-line utilities, that attempt to display or access environment variables containing sensitive cloud credential patterns (e.g., AWS_ACCESS, API_KEY). This behavior often indicates an attempt to steal cloud provider credentials from the host environment.
Detects suspicious execution patterns (such as encoded commands, downloading files via web clients, or using administration utilities) originating from third-party update, monitoring, or deployment agents. This behavior is indicative of a supply chain compromise or malicious activity leveraging trusted binaries to execute arbitrary code.
This rule detects suspicious process activity indicative of the Remcos RAT attempting to extract credentials from web browsers like Chrome, Firefox, or Opera. It specifically looks for `Remcos` related processes initiating browser executables with command-line arguments often associated with credential dumping or unusual browser behavior, such as `--allow-file-access`, `--no-sandbox`, `--headless`, or referencing a 'profile'.
Detects the modification of the 'UseLogonCredential' registry value to '1' within the WDigest security package settings. Enabling this setting allows the WDigest authentication protocol to cache cleartext credentials in the LSASS process memory, which is a common technique used by attackers to facilitate credential dumping and facilitate lateral movement.
Detects techniques used to bypass PowerShell Constrained Language Mode (CLM) including version downgrades, execution from trusted binary proxy hosts (such as InstallUtil, MSBuild, or Regasm), and manipulation of the __PSLockDownPolicy environment variable.
Detects the creation or modification of Named Locations within Conditional Access policies that include IP ranges. This behavior could indicate an attacker whitelisting their own IP addresses to maintain persistence or bypass Conditional Access security controls. The rule correlates changes with administrative context, such as non-standard business hours, weekends, or modifications by unexpected accounts.
Detects Entra ID guest (B2B) users performing a sign-in from a previously unseen IP address or country (observed over the last 30 days), followed within a 4-hour window by sensitive file operations in SharePoint, OneDrive, or Teams (e.g., file downloads, exports, or sensitivity label changes). This pattern is indicative of potential account takeover or unauthorized access to sensitive corporate data.
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