Darshan Thummar
@MightyCompletionist
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2,107 detections
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This rule detects attempts to perform SID History Injection via DCSync Replication. Specifically, it looks for TCP traffic on port 445 (SMB) directed to the home network, containing the string "DsAddSidHistory" case-insensitively. This activity is indicative of an attacker attempting to add a Security Identifier (SID) from another account to a target account's SIDHistory attribute, often as part of a privilege escalation technique like DCSync attacks, to gain unauthorized access or maintain persistence within an Active Directory environment.
This rule detects when the 'sIDHistory' attribute is added to a domain account. This is a common technique used in privilege escalation, particularly in Active Directory environments, where an attacker adds the SID of a highly privileged account (like a Domain Admin) to a compromised account's sIDHistory. This grants the compromised account the privileges of the added SID without changing its primary SID.
This rule detects the download of Office template files (such as .dot, .dotm, .xlt, .xltm, .pot, .potm) that contain VBA project content. This is indicative of potentially malicious Office documents designed to execute macros, often used for initial access or persistence by attackers.
This rule detects attempts to force the installation of browser extensions via a policy page. It specifically looks for the string "ExtensionInstallForcelist" in HTTP response data flowing to the client, indicating a mechanism used to programmatically install extensions, often abused by malware or unwanted programs to maintain persistence or inject malicious functionality into browsers.
This rule detects the download of a Chrome extension file (.crx) from an HTTP server to a client. It specifically looks for the string ".crx" in the HTTP URI and the string "CrOD" within the first 4 bytes of the file data, which is a common magic number for Chrome extension files. This combination suggests a potential malicious Chrome extension download, often used for persistence or other malicious activities.
This rule detects network traffic containing the string ".bashrc" on TCP port 22 (SSH). This could indicate an attempt to modify a user's shell profile for persistence, as .bashrc is a common file used to configure the Bash shell environment and can be leveraged by attackers to execute malicious commands upon login.
This rule detects network traffic over SMB (port 445) containing the string "SCRNSAVE.EXE" in a case-insensitive manner. This is indicative of a potential persistence mechanism where the screensaver executable has been replaced with a malicious one, and its name is being transmitted over the network, possibly during file transfer or command and control activities. The rule specifically looks for traffic flowing to the server on an established connection.
This rule detects HTTP POST requests to a web server where the URI contains both 'plugin' and 'install' (case-insensitive). This combination of keywords in a POST request URI could indicate an attempt to install a malicious plugin on a web application.
This rule detects attempts to modify the SSH daemon configuration file (sshd_config) remotely over an established TCP connection to port 22. The detection is based on the presence of the string "sshd_config" within the network flow, indicating potential remote manipulation of SSH authentication settings.
This rule detects attempts to modify Identity Provider authentication settings within Microsoft Graph. Specifically, it looks for HTTP PATCH requests to the 'authentication' endpoint on 'graph.microsoft.com'. This activity could indicate an attacker attempting to alter authentication mechanisms, potentially for persistence or to facilitate further access.
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