Rewterz Threat Alert – AsyncRAT – Active IOCs

Severity

High

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. More 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.

Impact

• Unauthorized Access
• Information Theft

Indicators of Compromise

MD5

b444577fcd5b2700747b84e0df60d98e
d6cbddee8e09d125f5fc0dc1941edcf5

SHA-256

c6441d3e239de8baafd6bb59c11f8fdd18955c75720441f4970494ab11e579e0
30255586e52bbc7f0baf824e7ad244be1bf0bb7850a4939e15b0f0b129b2e683

SHA-1

24e689cbc39433eddcfe679c9651cda6a7bf42ed
742c08c48b91183ef770658ff439322576c74216

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
• Do not download documents attached in emails from unknown sources and strictly refrain from enabling macros when the source isn’t reliable.
• Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets
• Patch and upgrade any platforms and software timely and make it into a standard security policy.
• Enforced Access Management Policies.
• 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.