An espionage campaign is a coordinated effort, typically by a nation-state or organized group, to secretly gather sensitive information from targeted organizations, governments, or individuals. These campaigns use various cyber techniques, such as phishing, malware, or social engineering, to infiltrate digital systems and steal confidential data. The primary goal is to gain strategic, political, or economic advantages without the target's knowledge. Espionage campaigns can last months or years and often remain undetected, posing significant risks to national security and corporate interests.