Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
7 followers9,573 downloads10,246 copies160 likes55,587 views
8,655 detections
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Detects the execution of MassLogger RAT components where the command line contains 'masslogger', 'mass.logger', or 'logger.exe', specifically when initiated by PowerShell or a process associated with 'RemotePC'. This rule aims to identify the loading or execution phase of the MassLogger RAT.
This rule detects attempts by a process, potentially a Remcos RAT loader identified by 'GST*.com' or 'GST' in its command line, to evade sandbox or virtual machine environments. It looks for the presence of common sandbox/VM indicators in the command line.
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'.
This rule detects processes that contain cryptocurrency-related keywords in their command line, specifically when initiated by common Windows executables like cmd.exe, powershell.exe, notepad.exe, or notepad++.exe. This behavior can indicate a ransomware infection attempting to display payment instructions or interact with cryptocurrency wallets.
Detects HTTP C2 communication patterns associated with Remcos RAT loader by monitoring network events for specific URLs and known malicious IP addresses. This rule identifies outbound network connections to hardcoded malicious IPs and specific URL paths often used for command and control by Remcos.
Detects the creation of archive files (ZIP, RAR, 7Z) or executables with specific naming conventions (GST_, Debit_, Invoice_, NEFT_, RTGS_) often associated with Remcos RAT loaders. This rule focuses on the initial file creation event on a device.
Detects potential Remcos RAT loader activity involving process hollowing or injection into browser processes. This rule specifically looks for common browser executables (iexplore.exe, chrome.exe, firefox.exe) where the initiating parent process is 'Optimax.dll' or contains 'SystemOptimizer', which are indicators associated with the Remcos RAT loader.
Detects remote PowerShell execution initiated by processes associated with Remcos RAT or Optimax. The rule specifically looks for PowerShell or cmd.exe processes executing commands containing 'IEX', 'Invoke-Expression', 'DownloadString', or a specific IP address (62.102.148.212), where the initiating parent process is identified as 'Remcos' or 'Optimax'. This indicates a potential compromise and execution of malicious code via a known RAT.
This rule detects suspicious process command lines that indicate the extraction of steganographically hidden payloads, potentially associated with the Remcos RAT. It specifically looks for processes with 'GST' in their name or initiating process file name, combined with keywords related to bitmap or image resource manipulation in the command line.
This rule detects the creation of common media file types (audio and video) within user-specific application data, temporary, or user profile directories. This activity could be indicative of various malicious behaviors, including data exfiltration, staging of malicious payloads, or the dropping of decoy files by malware.
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