Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects HTTP POST requests to a known suspicious endpoint ('/board.php') often used by the Chinotto Python backdoor. The rule monitors for outgoing web traffic containing 'data=' parameters or connections to known malicious domains, indicating potential exfiltration of base64-encoded command output.
Detects the execution of 'winget.exe' with the 'configure' command. This command is used to apply configuration files (typically YAML-based) to the system, which can automate software deployment, environment setup, or system changes. Adversaries may abuse this utility to facilitate malicious software deployment or system configuration changes via legitimate administrative tools.
Detects the execution of Windows Package Manager and configuration-related server binaries (WindowsPackageManagerServer.exe, ConfigurationRemotingServer.exe, DSCourier.exe) when not initiated by the authorized 'winget.exe' process. The rule further correlates these processes with the absence or delayed loading of the 'Microsoft.Management.Configuration' library, which may indicate unauthorized usage or tampering with package/configuration management components.
Detects the execution of the Windows ftp.exe binary using the -s parameter (or -s"": syntax) to execute a script file. This behavior is commonly associated with attackers using LOLBAS (Living Off the Land Binaries and Scripts) techniques to execute hidden or obfuscated scripts from mounted virtual hard disks (VHD) to facilitate malicious backdoor execution.
Detects the use of the Windows command shell 'copy' utility to concatenate separate files, such as 'header.doc' and 'body.doc', into an executable file named 'Windowsupdate.exe'. This technique is commonly used by adversaries to reassemble malicious payloads that were split to evade signature-based detection or bypass security controls.
Detects suspicious command-line strings stored in the Windows Explorer RunMRU registry key. Adversaries may use this location to store persistence commands or to obfuscate command-line arguments that are intended to be executed by the user or via automated processes.
Detects unauthorized access to VPN configuration files associated with common VPN providers (CyberGhost, NordVPN, ExpressVPN). This behavior is characteristic of the Hannibal Stealer, which attempts to exfiltrate these files to compromise user VPN sessions and credentials. The rule filters out legitimate process access to minimize false positives.
This rule detects the execution of common command-line or scripting tools (cmd.exe, powershell.exe, wscript.exe, cscript.exe, ftp.exe) or .lnk file handling triggered by explorer.exe immediately following the mounting of a VHD or VHDX file. This behavior is indicative of an attacker mounting a malicious virtual disk image and executing payloads contained within it.
This rule detects three distinct suspicious behaviors related to potential file manipulation and persistence mechanisms: 1. Use of 'copy /b' command to reconstruct files from fragments (e.g., header.doc, body.doc), commonly associated with file joining or data reconstruction. 2. File access within '_rels' directories targeting document fragments, often used in malicious document analysis or extraction. 3. Execution of 'Windowsupdate.exe' from the 'AppData\Local' directory, a technique often used for masquerading as a legitimate Windows service to establish persistence.
Detects reflective or beacon-style in-memory process injection where an injection-type action occurs in a target process, but no corresponding file creation event is recorded by the initiating process. This behavior is indicative of fileless malware loaders or reflective COFF-based execution, commonly used in adversary techniques like BOF (Beacon Object File) execution to bypass static disk-based security controls.
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