Rewterz Threat Alert – AsyncRAT – Active IOCs

Severity

Medium

Analysis Summary

AsyncRAT is an open-source tool designed for remote monitoring via encrypted connections. However, it could be utilized by threat actors as it provides keylogging, remote access, and other functionality that could damage a victim’s computer or system. This tool can be used to send malicious files to the system which once executed can be a source to other malicious software. These can also be used to transfer malicious programs into USB drives and can infect other systems. Numerous malware campaigns and threat actors have utilized AsyncRAT in various recent attacks. Recently, a social engineering campaign that targeted Thailand pass (an online travel agency) consumers were observed. Additionally, the Follina Outbreak in Australia spread AsyncRAT as a malicious payload. AsyncRAT can be delivered through a number of techniques, including spear-phishing, malicious advertising, exploit kits, and others.

One of the key features of AsyncRAT is its use of advanced encryption and obfuscation techniques to evade detection by anti-malware software. It also has the ability to update itself and download additional modules or plugins, which can be used to add new features or expand its capabilities. To protect against AsyncRAT and similar malware, it’s important to maintain up-to-date software and security patches, use strong access controls and passwords, and regularly back up important data. It’s also recommended to use anti-malware software and to be cautious of suspicious emails or links. If a system is suspected of being infected with AsyncRAT, it’s important to isolate it from the network and seek the assistance of a security professional.

Impact

• Unauthorized Access
• Information Theft

Indicators of Compromise

MD5

• 64fa214052828aa0e860c4df39ce2062
• 84b1ff6727940fe1ef2b8f31410e8dc1
• 5529958a4ba98f02f80e411f6a4f4523
• 4424941775f22885ab6898c1c1c60b1c

SHA-256

• 9ffac5cfce4255e57ad84ef7619e30cc8fd8ef9635524ef418aa9e038f130e95
• d071c4ad717b4f4fbfc6842ef23c1885f3649b98a332b3544b17228ffdf97d9f
• e905f262f2ec981ddf92c94fe44d96c14195f9bf0815f204c2c4197b16dbb053
• 2823dd4656b8073526d5a4db5dcd8f26877ddef0a51a11600bb7d9895c2e3c95

SHA-1

• 3c1a52b4da807dde91f6f971ca10a1f2279a571a
• 0fbeed7500e98c58ab35c2bbb4aa74283546af70
• 1f81cd5860244fba778da1d1bb04a3f828425531
• 1570a41dbfec4461d198354608f7a8fed51ef50c

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
• Maintain Offline Backups – In a ransomware attack, the adversary will often delete or encrypt backups if they have access to them. That’s why it’s important to keep offline (preferably off-site), encrypted backups of data and test them regularly.
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.
• Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
• Along with network and system hardening, code hardening should be implemented within the organization so that their websites and software are secure. Use testing tools to detect any vulnerabilities in the deployed codes.
• Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets