The GitHub repository «V-i-x-x/AMSI-BYPASS» provides information about a vulnerability known as «AMSI WRITE RAID» that can be exploited to bypass the Antimalware Scan Interface (AMSI).
📌Vulnerability Description: The «AMSI WRITE RAID» vulnerability allows attackers to overwrite specific writable entries in the AMSI call stack, effectively bypassing AMSI’s protections.
📌Writable Entries: The repository highlights that multiple entries in the AMSI call stack are writable and can be targeted to achieve the bypass. These entries are detailed in images such as «vulnerable_entries.png» and «writable_entries_part_1.png» provided in the repository.
📌Proof of Concept: The repository includes a PDF document (Amsi.pdf) that elaborates on the vulnerability, providing a comprehensive explanation and proof of concept for how the AMSI bypass can be executed.
📌Impact: Successfully exploiting this vulnerability allows malicious code to evade detection by AMSI, which is a significant security concern as AMSI is designed to provide an additional layer of defense against malware.
Impact on Industries
📌Increased Risk of Malware Infections: AMSI bypass techniques allow attackers to execute malicious code undetected, increasing the risk of malware infections, including ransomware and fileless attacks. This is particularly concerning for industries with sensitive data, such as finance, healthcare, and government sectors.
📌Compromised Security Posture: Bypassing AMSI can lead to a compromised security posture, as traditional antivirus and endpoint detection and response (EDR) solutions may fail to detect and prevent malicious activities. This can result in data breaches, financial losses, and damage to reputation.
📌Operational Disruptions: Successful AMSI bypass attacks can cause significant operational disruptions, especially in critical infrastructure sectors like energy, transportation, and utilities. These disruptions can have cascading effects on service delivery and public safety.