- Create a file using kaseya agent procedure update#
- Create a file using kaseya agent procedure software#
- Create a file using kaseya agent procedure windows#
This acted as a “ sleep ” function, delaying the subsequent PowerShell command for 5,693 seconds which is roughly 94 minutes.
Create a file using kaseya agent procedure windows#
The PING command has a -n parameter which instructs the Windows PING.EXE tool to send echo requests to the localhost (127.0.0.1). The first command is essentially a timer. The commands (given in probable sequence of execution) and what they do It is to be noted that since this file was deployed within the “ working ” directory which was excluded from malware defenses under Kaseya’s requirements, the encoding was probably not necessary in this case.Īfter deploying the payload, the Kaseya agent ran Windows shell commands (7 together), concatenated into a single string by using ‘ & ’ as delimiter. AGENT.CRT is encoded to prevent malware defenses from performing static file analysis with pattern scanning and machine learning when it is dropped. The Kaseya Agent Monitor (at C:\PROGRAM FILES (X86)\KASEYA\\AGENTMON.EXE, with the ID being the identification key for the server connected to the monitor instance) wrote out the Base64-encoded malicious payload AGENT.CRT to the VSA agent’s “ working ” directory for updates (by default, C:\KWORKING\).
Create a file using kaseya agent procedure software#
Create a file using kaseya agent procedure update#
The malware was delivered via a malicious update payload sent out to VSA servers, and in turn to the VSA agent applications running on managed Windows devices.This gave REvil the stealth in several ways: The researchers believe that REvil threat actors managed to exploit a zero-day vulnerability in Kaseya’s VSA servers to bypass authentication on the web panel and execute SQL commands on the appliance to deploy REvil payload to all connected clients. The attack narration in this document is created based on that information and other publicly available information on the internet. Security company SOPHOS had performed a detailed forensic analysis of the ransomware.
Kaseya supply chain attack resulted in more than a million individual devices being encrypted and frozen out of operation, according to the update on the official REvil blog. The customers received the malicious “VSA agent hotfix” pack that was able to overcome anti-virus protections by leveraging the old flawed version of the Microsoft Defender application. The attack was first detected on 2nd July and had spread to over over 30 MSPs and over 1,500 businesses in the US, AUS, EU, LATAM and Asia. Posted by Arnab Kumar Chattopadhayay on Jat 1:15am