Cybercriminals have breached dozens of major companies including AT&T, Ticketmaster and Hot Topic by exploiting "infostealer" malware that harvests login credentials from infected computers, an investigation has found. The malware, spread through pirated software and social media, has infected 250,000 new devices daily, according to cybersecurity firm Recorded Future. Russian developers create the malware while contractors distribute it globally, deliberately avoiding former Soviet states. Hot Topic suffered potentially the largest retail hack ever in October when attackers accessed 350 million customer records using stolen developer credentials. Google and Microsoft are racing to patch vulnerabilities, but malware makers quickly adapt to new security measures.

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