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

• 533f876556e02dec453f6fa4c2536967
• 70488131ff53f7f73f351f27f86a10ce
• 808371d24bd7ce681e45a4893a0c2db8
• 797a96f11dbaf5a64bde51be8ae1b0d0

SHA-256

• cd2c63e16f4c1e79e7763c278146acae54dca752c25ad46d47167f69d70d714a
• 308f16cf7000655a28f21e6d159ac68740d6c8437b2a83baaa563912a2bf7a19
• 05012029f292958279ee1e9a71f5760a438b2524d40dec747970a304e526377e
• 18bd70f00050748d95afc8186bb8d4eca32f6933eb5fed644ed54ff8a01754e9

SHA-1

• a4abdc1e4b26623e2be6c3715c1a75a5a6e2c397
• fce5bc2ff5d38c068de759868a6ddfb023cb3ca8
• 1463dbd8ac03f10a8a42033c46a9ccd02e5165f4
• 04830604fa3e508ce5c4119831f89e9353d2ae06

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.