A notorious cybercriminal gang is tricking businesses into installing malware. The hackers call their customer service representatives and convince them to open malicious email attachments. The culprits in these hacks appear to be the Carbanak gang, a group that was blamed last year for stealing as much as $1 billion from various banks. Security firm Trustwave said that three of its clients in the past month encountered malware built with coding found in previous attacks. Once the malware is installed, it can download other malicious tools to tamper with the rest of a business’s network.”]