Remcos (Remcos RAT)

Posted: December 23, 2023
from Cybersecurity Glossary
Remcos RAT
RemcosRAT Pro, RemcosRAT Cracked, RemcosRAT Lite
Account Takeover, Disabling User Account Control (UAC), Introducing Backdoor Vulnerabilities, Data Theft, Keylogging, Secret Recording
Risk Level:

Remcos, developed by the German IT company Breaking Security, is marketed as legitimate software but can be exploited by hackers as a component of malware. Functioning as a remote access tool, Remcos enables attackers to establish backdoors in the victim's device, eventually leading to full system access.

Possible symptoms

  • Unusual network traffic patterns, especially increased data transfer to external servers.
  • Unexpected system behavior, such as slow performance, crashes, or freezes.
  • Elevated CPU or memory usage without apparent cause.
  • Changes in system settings or configurations made without user intervention.
  • Unexplained modifications to files or registry entries.
  • Unauthorized access to sensitive information or accounts.

Sources of the infection

  • Malicious email attachments or links, often delivered through phishing campaigns.
  • Compromised or malicious websites hosting exploit kits that deliver the RAT upon visiting.
  • Infected removable media, such as USB drives, used to transfer the malware between systems.
  • Exploitation of software vulnerabilities in outdated or unpatched applications.
  • Malvertising campaigns that deliver the RAT through online advertisements.
  • Social engineering tactics, including fraudulent downloads or software updates.


Remcos, also known as Remcos RAT, is a remote administration tool developed by Breaking Security. While marketed as legitimate software, it's often utilized by hackers for malicious purposes, allowing them to take control of targeted systems.

Functioning as a Remote Access Trojan (RAT), Remcos facilitates unauthorized access and control over victim devices. Its capabilities include account takeover, disabling User Account Control (UAC), introducing backdoor vulnerabilities, data theft, keylogging, and secret recording.

Symptoms of a Remcos RAT infection may include unusual network traffic patterns, unexpected system behavior like slow performance or crashes, elevated CPU/memory usage, unexplained changes in settings or files, and unauthorized access to sensitive information or accounts.

Common sources of infection include malicious email attachments or links via phishing campaigns, compromised websites hosting exploit kits, infected removable media like USB drives, exploiting software vulnerabilities, malvertising, and social engineering tactics.

If you suspect a Remcos RAT infection, immediate steps include disconnecting from the network, running a full system scan with anti-malware tools, changing passwords, reviewing system logs, and seeking professional cybersecurity assistance.

To prevent Remcos RAT infections, maintain updated software and OS, use reputable anti-malware solutions, avoid untrusted downloads, verify email attachments, employ strong passwords, and regularly monitor system logs for any suspicious activities.

🤔 What to do?

If you suspect that your system is infected with Remcos RAT, take the following steps:

  1. Disconnect the infected device from the network to prevent further communication with the attacker.
  2. Run a full system scan using a Gridinsoft Anti-Malware to detect and remove the Remcos RAT.
  3. Change all passwords for sensitive accounts, including banking, email, and social media, to prevent unauthorized access.
  4. Review system logs to identify any unusual activities and investigate potential points of entry for the malware.
  5. Consider seeking assistance from a cybersecurity professional or IT support to ensure complete removal of the RAT and any associated vulnerabilities.

🛡️ Prevention

To prevent Remcos RAT infections, follow these security measures:

  • Keep your operating system and all software up to date with the latest security patches.
  • Use a Gridinsoft Anti-Malware and keep it regularly updated.
  • Avoid downloading and executing files or programs from untrusted sources.
  • Be cautious of email attachments, especially from unknown senders, and verify their legitimacy before opening.
  • Implement strong and unique passwords for all accounts, including system and network credentials.
  • Regularly monitor and review system logs for any suspicious activities.

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