According to the September 2020 threat intelligence feeds a new malware called Egregor was introduced and used in many attacks. Distnbution of Egregor is pnmanly through a Cobalt Strike that has been

While Egregor is malware, 'malware attack' is a broad category, and 'ransomware attack' is a more specific and accurate classification given the detailed attack methodology and motivation.

The description details a ransomware attack, characterized by the exfiltration of data and the threat of public release to compel victims to pay a ransom, a common tactic known as double extortion.

Whale-phishing is a social engineering attack targeting high-value individuals, which is not the primary mechanism described for Egregor's distribution via RDP exploits.

An insider threat involves malicious activity by an authorized individual within an organization, which contradicts the external RDP exploits and malware distribution described.