WildNeutron__2015__butterfly-corporate-spies-out-for-financial-gain.pdf

Symantec's Butterfly report profiles a financially motivated corporate espionage group, Butterfly, that used zero-day exploits to breach major technology firms and other sectors, deploying backdoors and hacktools while maintaining strong operational security and a multi-stage C&C infrastructure; it documents victims, targets, tools, and IoCs and concludes the attackers are a small, well-resourced team monetizing stolen data.