Phishing schemes are always evolving. This past year, email thread hijacking took phishing to new depths of subterfuge as criminals hid in plain sight within existing conversations. But no matter how well cybercriminals have refined their messaging or counterfeited legitimate logos and branding, the one constant has always been their delivery method: email. Until now. Online chat services have become a new target for cybercriminals to introduce documents loaded with malware into organizations.