What is AsyncRAT?
AsyncRAT (S1087) is a sophisticated Remote Access Trojan (RAT) that gives threat actors covert control over compromised systems.
AsyncRAT malware uses a flexible, modular design, with a core component that can be updated with different plugins or modules. It also uses asynchronous communication to evade detection, where it sends a signal and then disconnects. It checks back later for new commands.
Attackers use AsyncRAT for various remote actions, including logging keystrokes for capturing credentials, capturing the screen or accessing the webcam for surveillance, and managing files. It is typically delivered via phishing emails that exploit vulnerabilities in unpatched systems.
How to Defend Against AsyncRAT?
Defending against AsyncRAT requires a layered strategy focused on preventing its initial infection and detecting its C2 activity.
- Be cautious with phishing emails, as they are the primary delivery vector for this RAT.
- Keep all operating systems and applications patched to limit the vulnerabilities that can be exploited for initial access.
- Deploy endpoint detection and antivirus to identify and block the RAT’s execution and its malicious modules.
- Integrate threat intelligence from platforms like Lumu Maltiverse, to provide IoCs and behavioral signatures to enhance detection and automate incident response.
- Use network detection (NDR) with integrated threat intelligence to spot and block AsyncRAT’s C2 communications.
