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Operation High Roller is an advanced persistent threat (APT) that was discovered in 2013 and has been active since at least 2010. It targets financial institutions, particularly banks, to steal large amounts of money from their accounts. The APT uses a combination of social engineering tactics such as phishing emails or malware-infected USB drives to gain access to the target's network and then exploits vulnerabilities in banking software to transfer funds into its own accounts. Operation High Roller is known for being one of the most sophisticated APT attacks ever discovered, with a high level of stealthiness and persistence that makes it difficult to detect and stop.

Techniques, tactics and practices:

Operation High Roller uses a combination of social engineering tactics such as phishing emails or malware-infected USB drives to gain access to its target's network. Once inside, it exploits vulnerabilities in banking software to transfer funds into its own accounts. The APT is known for being highly stealthy and persistent, making it difficult to detect and stop. It targets financial institutions, particularly banks, with the goal of stealing large amounts of money from their accounts.