War Stories and Other Helpful Information

Executive summary On September 30th, 2022, GTSC, a Vietnamese cybersecurity company, released a warning stating, “while providing SOC service to a customer, GTSC Blueteam detected exploit requests in IIS logs with the same format as ProxyShell vulnerability.” This vulnerability would allow attackers to formulate a specially crafted HTTP request to the on-prem exchange server over port 443, enabling the attacker to execute malicious remote code on the system as the “SYSTEM” user. Microsoft confirmed both zero-day vulnerabilities late the evening of September 29, 2022 and said they were aware of “limited, targeted attacks using the two vulnerabilities to get into

What is an indicator of compromise (IOC)?  An indicator of compromise is a piece of digital forensic data that indicates a potential network breach. This information helps security investigators identify malicious or suspicious activity including threats, data breaches, and malware. IOCs can be collected during routine cybersecurity scans or manually if suspicious activity is detected.  Since IOC identification is primarily reactive, the discovery of an IOC typically means that an organization has already been compromised. However, this detection helps organizations to stop in-process attacks sooner and reduce the attack’s impact. In addition, investigating IOCs can be used to repair existing